FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/dmc.c @ 444:caeff442faf1
os_sem_fl.c: os_ResetSemaphore() done
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 23 Jun 2014 01:10:51 +0000 |
parents | afceeeb2cba1 |
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rev | line source |
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1 /*************************************************************************/ |
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2 /* */ |
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3 /* Copyright Mentor Graphics Corporation 2002 */ |
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4 /* All Rights Reserved. */ |
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5 /* */ |
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6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ |
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7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ |
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8 /* SUBJECT TO LICENSE TERMS. */ |
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9 /* */ |
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10 /*************************************************************************/ |
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11 |
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12 /*************************************************************************/ |
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13 /* */ |
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14 /* FILE NAME VERSION */ |
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15 /* */ |
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16 /* dmc.c Nucleus PLUS 1.14 */ |
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17 /* */ |
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18 /* COMPONENT */ |
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19 /* */ |
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20 /* DM - Dynamic Memory Management */ |
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21 /* */ |
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22 /* DESCRIPTION */ |
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23 /* */ |
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24 /* This file contains the core routines for the Dynamic Memory */ |
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25 /* Management component. */ |
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26 /* */ |
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27 /* DATA STRUCTURES */ |
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28 /* */ |
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29 /* None */ |
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30 /* */ |
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31 /* FUNCTIONS */ |
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32 /* */ |
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33 /* DMC_Create_Memory_Pool Create a dynamic memory pool */ |
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34 /* DMC_Delete_Memory_Pool Delete a dynamic memory pool */ |
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35 /* DMC_Allocate_Memory Allocate a memory block from */ |
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36 /* a dynamic memory pool */ |
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37 /* DMC_Deallocate_Memory Deallocate a memory block */ |
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38 /* from a dynamic memory pool */ |
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39 /* DMC_Cleanup Cleanup on timeout or a */ |
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40 /* terminate condition */ |
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41 /* */ |
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42 /* DEPENDENCIES */ |
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43 /* */ |
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44 /* cs_extr.h Common Service functions */ |
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45 /* tc_extr.h Thread Control functions */ |
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46 /* dm_extr.h Partition functions */ |
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47 /* hi_extr.h History functions */ |
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48 /* */ |
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49 /* HISTORY */ |
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50 /* */ |
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51 /* DATE REMARKS */ |
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52 /* */ |
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53 /* 03-01-1993 Created initial version 1.0 */ |
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54 /* 04-19-1993 Verified version 1.0 */ |
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55 /* 08-09-1993 Corrected pointer retrieval */ |
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56 /* loop, resulting in version 1.0a */ |
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57 /* 08-09-1993 Verified version 1.0a */ |
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58 /* 03-01-1994 Moved non-core functions into */ |
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59 /* supplemental files, changed */ |
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60 /* function interfaces to match */ |
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61 /* those in prototype, added */ |
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62 /* register options, changed */ |
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63 /* protection logic to reduce */ |
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64 /* overhead, resulting in */ |
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65 /* version 1.1 */ |
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66 /* */ |
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67 /* 03-18-1994 Verified version 1.1 */ |
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68 /* 04-17-1996 updated to version 1.2 */ |
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69 /* 03-24-1998 Released version 1.3. */ |
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70 /* 03-26-1999 Released 1.11m (new release */ |
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71 /* numbering scheme) */ |
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72 /* 04-17-2002 Released version 1.13m */ |
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73 /* 11-07-2002 Released version 1.14 */ |
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74 /*************************************************************************/ |
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75 #define NU_SOURCE_FILE |
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76 |
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77 |
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78 #include "cs_extr.h" /* Common service functions */ |
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79 #include "tc_extr.h" /* Thread control functions */ |
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80 #include "dm_extr.h" /* Dynamic memory functions */ |
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81 #include "hi_extr.h" /* History functions */ |
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82 #include "profiler.h" /* ProView interface */ |
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83 |
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84 |
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85 /* Define external inner-component global data references. */ |
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86 |
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87 extern CS_NODE *DMD_Created_Pools_List; |
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88 extern UNSIGNED DMD_Total_Pools; |
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89 extern TC_PROTECT DMD_List_Protect; |
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90 |
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91 |
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92 /* Define internal component function prototypes. */ |
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93 |
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94 VOID DMC_Cleanup(VOID *information); |
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95 |
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96 |
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97 /*************************************************************************/ |
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98 /* */ |
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99 /* FUNCTION */ |
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100 /* */ |
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101 /* DMC_Create_Memory_Pool */ |
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102 /* */ |
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103 /* DESCRIPTION */ |
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104 /* */ |
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105 /* This function creates a dynamic memory pool and then places it */ |
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106 /* on the list of created dynamic memory pools. */ |
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107 /* */ |
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108 /* CALLED BY */ |
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109 /* */ |
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110 /* Application */ |
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111 /* DMCE_Create_Memory_Pool Error checking shell */ |
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112 /* */ |
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113 /* CALLS */ |
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114 /* */ |
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115 /* CSC_Place_On_List Add node to linked-list */ |
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116 /* [HIC_Make_History_Entry] Make entry in history log */ |
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117 /* [TCT_Check_Stack] Stack checking function */ |
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118 /* TCT_Protect Data structure protect */ |
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119 /* TCT_Unprotect Un-protect data structure */ |
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120 /* */ |
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121 /* INPUTS */ |
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122 /* */ |
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123 /* pool_ptr Memory pool control block */ |
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124 /* pointer */ |
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125 /* name Memory pool name */ |
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126 /* start_address Starting address of the pool */ |
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127 /* pool_size Number of bytes in the pool */ |
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128 /* min_allocation Minimum allocation size */ |
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129 /* suspend_type Suspension type */ |
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130 /* */ |
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131 /* OUTPUTS */ |
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132 /* */ |
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133 /* NU_SUCCESS */ |
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134 /* */ |
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135 /* HISTORY */ |
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136 /* */ |
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137 /* DATE REMARKS */ |
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138 /* */ |
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139 /* 03-01-1993 Created initial version 1.0 */ |
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140 /* 04-19-1993 Verified version 1.0 */ |
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141 /* 03-01-1994 Changed function interfaces to */ |
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142 /* match those in prototype, */ |
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143 /* added register options, */ |
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144 /* resulting in version 1.1 */ |
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145 /* */ |
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146 /* 03-18-1994 Verified version 1.1 */ |
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147 /* */ |
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148 /*************************************************************************/ |
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149 STATUS DMC_Create_Memory_Pool(NU_MEMORY_POOL *pool_ptr, CHAR *name, |
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150 VOID *start_address, UNSIGNED pool_size, |
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151 UNSIGNED min_allocation, OPTION suspend_type) |
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152 { |
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153 |
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154 R1 DM_PCB *pool; /* Pool control block ptr */ |
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155 INT i; /* Working index variable */ |
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156 DM_HEADER *header_ptr; /* Partition block header ptr*/ |
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157 NU_SUPERV_USER_VARIABLES |
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158 |
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159 /* Switch to supervisor mode */ |
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160 NU_SUPERVISOR_MODE(); |
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161 |
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162 /* Move input pool pointer into internal pointer. */ |
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163 pool = (DM_PCB *) pool_ptr; |
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164 |
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165 |
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166 #ifdef NU_ENABLE_STACK_CHECK |
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167 |
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168 /* Call stack checking function to check for an overflow condition. */ |
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169 TCT_Check_Stack(); |
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170 |
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171 #endif |
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172 |
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173 #ifdef NU_ENABLE_HISTORY |
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174 |
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175 /* Make an entry that corresponds to this function in the system history |
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176 log. */ |
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177 HIC_Make_History_Entry(NU_CREATE_MEMORY_POOL_ID, (UNSIGNED) pool, |
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178 (UNSIGNED) start_address, (UNSIGNED) pool_size); |
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179 |
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180 #endif |
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181 |
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182 /* First, clear the partition pool ID just in case it is an old |
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183 pool control block. */ |
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184 pool -> dm_id = 0; |
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185 |
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186 /* Fill in the partition pool name. */ |
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187 for (i = 0; i < NU_MAX_NAME; i++) |
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188 pool -> dm_name[i] = name[i]; |
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189 |
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190 /* Convert the pool's size into something that is evenly divisible by |
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191 the sizeof an UNSIGNED data element. */ |
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192 pool_size = (pool_size/sizeof(UNSIGNED)) * sizeof(UNSIGNED); |
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193 |
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194 /* Save the starting address and size parameters in the dynamic memory |
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195 control block. */ |
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196 pool -> dm_start_address = start_address; |
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197 pool -> dm_pool_size = pool_size; |
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198 pool -> dm_min_allocation = |
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199 ((min_allocation + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * |
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200 sizeof(UNSIGNED); |
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201 |
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202 /* Setup the dynamic memory pool suspension type. */ |
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203 if (suspend_type == NU_FIFO) |
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204 |
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205 /* FIFO suspension is selected, setup the flag accordingly. */ |
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206 pool -> dm_fifo_suspend = NU_TRUE; |
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207 else |
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208 |
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209 /* Priority suspension is selected. */ |
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210 pool -> dm_fifo_suspend = NU_FALSE; |
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211 |
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212 /* Clear the suspension list pointer. */ |
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213 pool -> dm_suspension_list = NU_NULL; |
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214 |
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215 /* Clear the number of tasks waiting on the dynamic memory pool. */ |
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216 pool -> dm_tasks_waiting = 0; |
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217 |
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218 /* Initialize link pointers. */ |
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219 pool -> dm_created.cs_previous = NU_NULL; |
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220 pool -> dm_created.cs_next = NU_NULL; |
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221 |
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222 /* Build a single block that has all of the memory. */ |
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223 header_ptr = (DM_HEADER *) start_address; |
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224 |
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225 /* Initialize the memory parameters. */ |
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226 pool -> dm_available = pool_size - (2 * DM_OVERHEAD); |
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227 pool -> dm_memory_list = header_ptr; |
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228 pool -> dm_search_ptr = header_ptr; |
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229 |
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230 /* Build the block header. */ |
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231 header_ptr -> dm_memory_pool = pool; |
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232 header_ptr -> dm_memory_free = NU_TRUE; |
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233 header_ptr -> dm_next_memory = (DM_HEADER *) |
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234 (((BYTE_PTR) header_ptr) + pool -> dm_available + DM_OVERHEAD); |
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235 header_ptr -> dm_previous_memory = header_ptr -> dm_next_memory; |
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236 |
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237 /* Build the small trailer block that prevents block merging when the |
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238 pool wraps around. Note that the list is circular so searching can |
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239 wrap across the physical end of the memory pool. */ |
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240 header_ptr = header_ptr -> dm_next_memory; |
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241 header_ptr -> dm_next_memory = (DM_HEADER *) start_address; |
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242 header_ptr -> dm_previous_memory = (DM_HEADER *) start_address; |
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243 header_ptr -> dm_memory_pool = pool; |
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244 header_ptr -> dm_memory_free = NU_FALSE; |
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245 |
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246 /* Initialize the protection structure. */ |
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247 pool -> dm_protect.tc_tcb_pointer = NU_NULL; |
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248 |
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249 /* Protect against access to the list of created memory pools. */ |
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250 TCT_Protect(&DMD_List_Protect); |
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251 |
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252 /* At this point the dynamic memory pool is completely built. The ID can |
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253 now be set and it can be linked into the created dynamic memory |
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254 pool list. */ |
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255 pool -> dm_id = DM_DYNAMIC_ID; |
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256 |
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257 /* Link the memory pool into the list of created memory pools and |
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258 increment the total number of pools in the system. */ |
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259 CSC_Place_On_List(&DMD_Created_Pools_List, &(pool -> dm_created)); |
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260 DMD_Total_Pools++; |
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261 |
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262 #ifdef INCLUDE_PROVIEW |
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263 _RTProf_DumpMemoryPool(RT_PROF_CREATE_MEMORY_POOL,pool,RT_PROF_OK); |
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264 #endif /*INCLUDE_PROVIEW*/ |
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265 /* Release protection against access to the list of created memory |
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266 pools. */ |
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267 TCT_Unprotect(); |
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268 |
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269 /* Return to user mode */ |
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270 NU_USER_MODE(); |
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271 |
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272 /* Return successful completion. */ |
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273 return(NU_SUCCESS); |
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274 } |
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275 |
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276 |
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277 /*************************************************************************/ |
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278 /* */ |
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279 /* FUNCTION */ |
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280 /* */ |
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281 /* DMC_Delete_Memory_Pool */ |
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282 /* */ |
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283 /* DESCRIPTION */ |
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284 /* */ |
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285 /* This function deletes a dynamic memory pool and removes it from */ |
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286 /* the list of created memory pools. All tasks suspended on the */ |
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287 /* memory pool are resumed with the appropriate error status. */ |
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288 /* Note that this function does not free any memory associated with */ |
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289 /* either the pool area or the pool control block. */ |
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290 /* */ |
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291 /* CALLED BY */ |
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292 /* */ |
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293 /* Application */ |
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294 /* DMCE_Delete_Memory_Pool Error checking shell */ |
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295 /* */ |
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296 /* CALLS */ |
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297 /* */ |
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298 /* CSC_Remove_From_List Remove node from list */ |
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299 /* [HIC_Make_History_Entry] Make entry in history log */ |
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300 /* TCC_Resume_Task Resume a suspended task */ |
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301 /* [TCT_Check_Stack] Stack checking function */ |
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302 /* TCT_Control_To_System Transfer control to system */ |
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303 /* TCT_Protect Protect created list */ |
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304 /* TCT_Set_Current_Protect Modify current protection */ |
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305 /* TCT_System_Protect Setup system protection */ |
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306 /* TCT_System_Unprotect Release system protection */ |
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307 /* TCT_Unprotect Release protection */ |
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308 /* */ |
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309 /* INPUTS */ |
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310 /* */ |
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311 /* pool_ptr Memory pool control block */ |
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312 /* pointer */ |
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313 /* */ |
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314 /* OUTPUTS */ |
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315 /* */ |
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316 /* NU_SUCCESS */ |
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317 /* */ |
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318 /* HISTORY */ |
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319 /* */ |
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320 /* DATE REMARKS */ |
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321 /* */ |
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322 /* 03-01-1993 Created initial version 1.0 */ |
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323 /* 04-19-1993 Verified version 1.0 */ |
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324 /* 03-01-1994 Changed function interfaces to */ |
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325 /* match those in prototype, */ |
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326 /* added register options, changed */ |
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327 /* protection logic to reduce */ |
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328 /* overhead, resulting in */ |
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329 /* version 1.1 */ |
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330 /* */ |
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331 /* 03-18-1994 Verified version 1.1 */ |
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332 /* */ |
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333 /*************************************************************************/ |
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334 STATUS DMC_Delete_Memory_Pool(NU_MEMORY_POOL *pool_ptr) |
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335 { |
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336 |
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337 R1 DM_PCB *pool; /* Pool control block ptr */ |
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338 DM_SUSPEND *suspend_ptr; /* Suspend block pointer */ |
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339 DM_SUSPEND *next_ptr; /* Next suspend block */ |
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340 STATUS preempt; /* Status for resume call */ |
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341 NU_SUPERV_USER_VARIABLES |
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342 |
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343 /* Switch to supervisor mode */ |
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344 NU_SUPERVISOR_MODE(); |
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345 |
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346 /* Move input pool pointer into internal pointer. */ |
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347 pool = (DM_PCB *) pool_ptr; |
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348 |
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349 #ifdef NU_ENABLE_STACK_CHECK |
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350 |
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351 /* Call stack checking function to check for an overflow condition. */ |
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352 TCT_Check_Stack(); |
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353 |
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354 #endif |
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355 |
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356 #ifdef NU_ENABLE_HISTORY |
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357 |
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358 /* Make an entry that corresponds to this function in the system history |
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359 log. */ |
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360 HIC_Make_History_Entry(NU_DELETE_MEMORY_POOL_ID, (UNSIGNED) pool, |
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361 (UNSIGNED) 0, (UNSIGNED) 0); |
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362 |
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363 #endif |
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364 |
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365 /* Protect against simultaneous access to the memory pool. */ |
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366 TCT_Protect(&(pool -> dm_protect)); |
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367 |
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368 #ifdef INCLUDE_PROVIEW |
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369 _RTProf_DumpMemoryPool(RT_PROF_DELETE_MEMORY_POOL,pool,RT_PROF_OK); |
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370 #endif /*INCLUDE_PROVIEW*/ |
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371 /* Clear the memory pool ID. */ |
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372 pool -> dm_id = 0; |
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373 |
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374 /* Release protection. */ |
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375 TCT_Unprotect(); |
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376 |
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377 /* Protect against access to the list of created memory pools. */ |
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378 TCT_Protect(&DMD_List_Protect); |
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379 |
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380 /* Remove the memory pool from the list of created memory pools. */ |
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381 CSC_Remove_From_List(&DMD_Created_Pools_List, &(pool -> dm_created)); |
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382 |
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383 /* Decrement the total number of created memory pools. */ |
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384 DMD_Total_Pools--; |
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385 |
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386 /* Pickup the suspended task pointer list. */ |
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387 suspend_ptr = pool -> dm_suspension_list; |
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388 |
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389 /* Walk the chain task(s) currently suspended on the memory pool. */ |
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390 preempt = 0; |
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391 while (suspend_ptr) |
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392 { |
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393 |
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394 /* Protect against system access. */ |
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395 TCT_System_Protect(); |
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396 |
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397 /* Resume the suspended task. Insure that the status returned is |
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398 NU_POOL_DELETED. */ |
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399 suspend_ptr -> dm_return_pointer = NU_NULL; |
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400 suspend_ptr -> dm_return_status = NU_POOL_DELETED; |
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401 |
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402 /* Point to the next suspend structure in the link. */ |
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403 next_ptr = (DM_SUSPEND *) (suspend_ptr -> dm_suspend_link.cs_next); |
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404 |
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405 /* Resume the specified task. */ |
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406 preempt = preempt | |
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407 TCC_Resume_Task((NU_TASK *) suspend_ptr -> dm_suspended_task, |
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408 NU_MEMORY_SUSPEND); |
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409 |
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410 /* Determine if the next is the same as the current pointer. */ |
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411 if (next_ptr == pool -> dm_suspension_list) |
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412 |
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413 /* Clear the suspension pointer to signal the end of the list |
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414 traversal. */ |
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415 suspend_ptr = NU_NULL; |
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416 else |
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417 |
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418 /* Move the next pointer into the suspend block pointer. */ |
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419 suspend_ptr = next_ptr; |
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420 |
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421 /* Modify current protection. */ |
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422 TCT_Set_Current_Protect(&DMD_List_Protect); |
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|
423 |
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424 /* Clear the system protection. */ |
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425 TCT_System_Unprotect(); |
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426 } |
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427 |
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428 /* Determine if preemption needs to occur. */ |
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429 if (preempt) |
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430 |
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431 /* Transfer control to system to facilitate preemption. */ |
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432 TCT_Control_To_System(); |
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433 |
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434 /* Release protection against access to the list of created memory |
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435 pools. */ |
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|
436 TCT_Unprotect(); |
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|
437 |
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|
438 /* Return to user mode */ |
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|
439 NU_USER_MODE(); |
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|
440 |
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|
441 /* Return a successful completion. */ |
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442 return(NU_SUCCESS); |
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|
443 } |
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|
444 |
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|
445 |
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446 /*************************************************************************/ |
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|
447 /* */ |
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|
448 /* FUNCTION */ |
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|
449 /* */ |
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|
450 /* DMC_Allocate_Memory */ |
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|
451 /* */ |
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|
452 /* DESCRIPTION */ |
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|
453 /* */ |
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|
454 /* This function allocates memory from the specified dynamic memory */ |
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|
455 /* pool. If dynamic memory is currently available, this function */ |
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|
456 /* is completed immediately. Otherwise, if there is not enough */ |
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|
457 /* memory currently available, task suspension is possible. */ |
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|
458 /* */ |
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diff
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|
459 /* CALLED BY */ |
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diff
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|
460 /* */ |
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diff
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|
461 /* Application */ |
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|
462 /* DMCE_Allocate_Memory Error checking shell */ |
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|
463 /* */ |
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diff
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|
464 /* CALLS */ |
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|
465 /* */ |
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|
466 /* CSC_Place_On_List Place on suspend list */ |
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|
467 /* [HIC_Make_History_Entry] Make entry in history log */ |
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|
468 /* TCC_Suspend_Task Suspend calling task */ |
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|
469 /* TCC_Task_Priority Pickup task priority */ |
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|
470 /* [TCT_Check_Stack] Stack checking function */ |
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|
471 /* TCT_Current_Thread Pickup current thread pointer*/ |
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|
472 /* TCT_Protect Protect memory pool */ |
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|
473 /* TCT_Set_Suspend_Protect Save suspend protection */ |
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|
474 /* TCT_System_Protect Protect system structures */ |
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|
475 /* TCT_Unprotect Release protection */ |
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|
476 /* TCT_Unprotect_Specific Release specific protection */ |
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diff
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|
477 /* */ |
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diff
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|
478 /* INPUTS */ |
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|
479 /* */ |
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|
480 /* pool_ptr Memory pool pointer */ |
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|
481 /* return_pointer Pointer to the destination */ |
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diff
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|
482 /* memory pointer */ |
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diff
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|
483 /* size Number of bytes requested */ |
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|
484 /* suspend Suspension option if full */ |
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|
485 /* */ |
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|
486 /* OUTPUTS */ |
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|
487 /* */ |
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|
488 /* NU_SUCCESS If service is successful */ |
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|
489 /* NU_NO_MEMORY Memory not available */ |
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|
490 /* NU_TIMEOUT If timeout on service */ |
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|
491 /* NU_POOL_DELETED If memory pool deleted */ |
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|
492 /* during suspension */ |
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diff
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|
493 /* */ |
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diff
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|
494 /* HISTORY */ |
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diff
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|
495 /* */ |
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|
496 /* DATE REMARKS */ |
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|
497 /* */ |
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|
498 /* 03-01-1993 Created initial version 1.0 */ |
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|
499 /* 04-19-1993 Verified version 1.0 */ |
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|
500 /* 03-01-1994 Changed function interfaces to */ |
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parents:
diff
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|
501 /* match those in prototype, */ |
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parents:
diff
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|
502 /* added register options, changed */ |
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parents:
diff
changeset
|
503 /* protection logic to reduce */ |
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|
504 /* overhead, resulting in */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
505 /* version 1.1 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
506 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
507 /* 03-18-1994 Verified version 1.1 */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
508 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
509 /*************************************************************************/ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
510 STATUS DMC_Allocate_Memory(NU_MEMORY_POOL *pool_ptr, VOID **return_pointer, |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
511 UNSIGNED size, UNSIGNED suspend) |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
512 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
513 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
514 R1 DM_PCB *pool; /* Pool control block ptr */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
515 R2 DM_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
516 DM_SUSPEND suspend_block; /* Allocate suspension block */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
517 R4 DM_HEADER *memory_ptr; /* Pointer to memory */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
518 R3 DM_HEADER *new_ptr; /* New split block pointer */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
519 UNSIGNED free_size; /* Size of block found */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
520 TC_TCB *task; /* Task pointer */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
521 STATUS status; /* Completion status */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
522 NU_SUPERV_USER_VARIABLES |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
523 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
524 /* Switch to supervisor mode */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
525 NU_SUPERVISOR_MODE(); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
526 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
527 /* Move input pool pointer into internal pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
528 pool = (DM_PCB *) pool_ptr; |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
529 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
530 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
531 #ifdef NU_ENABLE_STACK_CHECK |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
532 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
533 /* Call stack checking function to check for an overflow condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
534 TCT_Check_Stack(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
535 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
536 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
537 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
538 #ifdef NU_ENABLE_HISTORY |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
539 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
540 /* Make an entry that corresponds to this function in the system history |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
541 log. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
542 HIC_Make_History_Entry(NU_ALLOCATE_MEMORY_ID, (UNSIGNED) pool, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
543 (UNSIGNED) return_pointer, (UNSIGNED) size); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
544 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
545 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
546 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
547 /* Initialize the status as successful. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
548 status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
549 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
550 /* Adjust the request to a size evenly divisible by the number of bytes |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
551 in an UNSIGNED data element. Also, check to make sure it is of the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
552 minimum size. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
553 if (size < pool -> dm_min_allocation) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
554 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
555 /* Change size to the minimum allocation. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
556 size = pool -> dm_min_allocation; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
557 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
558 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
559 /* Insure that size is a multiple of the UNSIGNED size. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
560 size = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
561 ((size + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * sizeof(UNSIGNED); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
562 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
563 /* Protect against simultaneous access to the memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
564 TCT_Protect(&(pool -> dm_protect)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
565 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
566 /* Search the memory list for the first available block of memory that |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
567 satisfies the request. Note that blocks are merged during the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
568 deallocation function. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
569 memory_ptr = pool -> dm_search_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
570 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
571 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
572 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
573 /* Determine if the block is free and if it can satisfy the request. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
574 if (memory_ptr -> dm_memory_free) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
575 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
576 /* Calculate the free block size. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
577 free_size = (((BYTE_PTR) (memory_ptr -> dm_next_memory)) - |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
578 ((BYTE_PTR) memory_ptr)) - DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
579 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
580 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
581 /* There are no free bytes available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
582 free_size = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
583 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
584 /* Determine if the search should continue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
585 if (free_size < size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
586 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
587 /* Large enough block has not been found. Move the search |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
588 pointer to the next block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
589 memory_ptr = memory_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
590 } while((free_size < size) && (memory_ptr != pool -> dm_search_ptr)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
591 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
592 /* Determine if the memory is available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
593 if (free_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
594 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
595 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
596 /* A block that satisfies the request has been found. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
597 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
598 /* Determine if the block needs to be split. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
599 if (free_size >= (size + DM_OVERHEAD + pool -> dm_min_allocation)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
600 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
601 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
602 /* Yes, split the block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
603 new_ptr = (DM_HEADER *) (((BYTE_PTR) memory_ptr) + size + |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
604 DM_OVERHEAD); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
605 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
606 /* Mark the new block as free. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
607 new_ptr -> dm_memory_free = NU_TRUE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
608 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
609 /* Put the pool pointer into the new block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
610 new_ptr -> dm_memory_pool = pool; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
611 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
612 /* Build the necessary pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
613 new_ptr -> dm_previous_memory = memory_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
614 new_ptr -> dm_next_memory = memory_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
615 (new_ptr -> dm_next_memory) -> dm_previous_memory = new_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
616 memory_ptr -> dm_next_memory = new_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
617 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
618 /* Decrement the available byte count. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
619 pool -> dm_available = pool -> dm_available - size - DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
620 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
621 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
622 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
623 /* Decrement the entire free size from the available bytes |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
624 count. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
625 pool -> dm_available = pool -> dm_available - free_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
626 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
627 /* Mark the allocated block as not available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
628 memory_ptr -> dm_memory_free = NU_FALSE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
629 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
630 /* Should the search pointer be moved? */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
631 if (pool -> dm_search_ptr == memory_ptr) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
632 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
633 /* Move the search pointer to the next free memory slot. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
634 pool -> dm_search_ptr = memory_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
635 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
636 /* Return a memory address to the caller. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
637 *return_pointer = (VOID *) (((BYTE_PTR) memory_ptr) + DM_OVERHEAD); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
638 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
639 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
640 #endif /*INCLUDE_PROVIEW*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
641 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
642 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
643 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
644 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
645 /* Enough dynamic memory is not available. Determine if suspension is |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
646 required. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
647 if (suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
648 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
649 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
650 /* Suspension is selected. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
651 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
652 /* Increment the number of tasks waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
653 pool -> dm_tasks_waiting++; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
654 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
655 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
656 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_WAIT); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
657 #endif /*INCLUDE_PROVIEW*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
658 /* Setup the suspend block and suspend the calling task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
659 suspend_ptr = &suspend_block; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
660 suspend_ptr -> dm_memory_pool = pool; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
661 suspend_ptr -> dm_request_size = size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
662 suspend_ptr -> dm_suspend_link.cs_next = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
663 suspend_ptr -> dm_suspend_link.cs_previous = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
664 task = (TC_TCB *) TCT_Current_Thread(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
665 suspend_ptr -> dm_suspended_task = task; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
666 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
667 /* Determine if priority or FIFO suspension is associated with the |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
668 memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
669 if (pool -> dm_fifo_suspend) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
670 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
671 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
672 /* FIFO suspension is required. Link the suspend block into |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
673 the list of suspended tasks on this memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
674 CSC_Place_On_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
675 &(pool -> dm_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
676 &(suspend_ptr -> dm_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
677 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
678 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
679 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
680 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
681 /* Get the priority of the current thread so the suspend block |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
682 can be placed in the appropriate place. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
683 suspend_ptr -> dm_suspend_link.cs_priority = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
684 TCC_Task_Priority(task); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
685 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
686 CSC_Priority_Place_On_List((CS_NODE **) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
687 &(pool -> dm_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
688 &(suspend_ptr -> dm_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
689 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
690 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
691 /* Protect against system access. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
692 TCT_System_Protect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
693 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
694 /* Save the list protection in preparation for suspension. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
695 TCT_Set_Suspend_Protect(&(pool -> dm_protect)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
696 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
697 /* Release protection of dynamic memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
698 TCT_Unprotect_Specific(&(pool -> dm_protect)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
699 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
700 /* Finally, suspend the calling task. Note that the suspension call |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
701 automatically clears the system protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
702 TCC_Suspend_Task((NU_TASK *) task, NU_MEMORY_SUSPEND, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
703 DMC_Cleanup, suspend_ptr, suspend); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
704 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
705 /* Pickup the return status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
706 status = suspend_ptr -> dm_return_status; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
707 *return_pointer = suspend_ptr -> dm_return_pointer; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
708 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
709 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
710 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
711 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
712 /* No suspension requested. Simply return an error status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
713 status = NU_NO_MEMORY; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
714 *return_pointer = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
715 #ifdef INCLUDE_PROVIEW |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
716 _RTProf_DumpMemoryPool(RT_PROF_ALLOCATE_MEMORY,pool,RT_PROF_FAIL); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
717 #endif /*INCLUDE_PROVIEW*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
718 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
719 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
720 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
721 /* Release protection of the memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
722 TCT_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
723 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
724 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
725 NU_USER_MODE(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
726 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
727 /* Return the completion status. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
728 return(status); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
729 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
730 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
731 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
732 /*************************************************************************/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
733 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
734 /* FUNCTION */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
735 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
736 /* DMC_Deallocate_Memory */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
737 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
738 /* DESCRIPTION */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
739 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
740 /* This function deallocates a previously allocated dynamic memory */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
741 /* block. The deallocated dynamic memory block is merged with any */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
742 /* adjacent neighbors. This insures that there are no consecutive */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
743 /* blocks of free memory in the pool (makes the search easier!). */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
744 /* If there is a task waiting for dynamic memory, a determination */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
745 /* of whether or not the request can now be satisfied is made after */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
746 /* the deallocation is complete. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
747 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
748 /* CALLED BY */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
749 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
750 /* Application */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
751 /* DMCE_Deallocate_Memory Error checking shell */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
752 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
753 /* CALLS */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
754 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
755 /* CSC_Remove_From_List Remove from suspend list */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
756 /* [HIC_Make_History_Entry] Make entry in history log */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
757 /* TCC_Resume_Task Resume a suspended task */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
758 /* [TCT_Check_Stack] Stack checking function */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
759 /* TCT_Control_To_System Transfer control to system */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
760 /* TCT_Set_Current_Protect Set current protection */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
761 /* TCT_System_Protect Protect system structures */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
762 /* TCT_System_Unprotect Release system protection */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
763 /* TCT_Protect Protect dynamic memory pool */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
764 /* TCT_Unprotect Release protection */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
765 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
766 /* INPUTS */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
767 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
768 /* memory Pointer to dynamic memory */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
769 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
770 /* OUTPUTS */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
771 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
772 /* NU_SUCCESS */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
773 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
774 /* HISTORY */ |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
775 /* */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
776 /* DATE REMARKS */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
777 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
778 /* 03-01-1993 Created initial version 1.0 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
779 /* 04-19-1993 Verified version 1.0 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
780 /* 03-01-1994 Added register options, changed */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
781 /* protection logic to reduce */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
782 /* overhead, resulting in */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
783 /* version 1.1 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
784 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
785 /* 03-18-1994 Verified version 1.1 */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
786 /* */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
787 /*************************************************************************/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
788 STATUS DMC_Deallocate_Memory(VOID *memory) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
789 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
790 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
791 R1 DM_PCB *pool; /* Pool pointer */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
792 R3 DM_SUSPEND *suspend_ptr; /* Pointer to suspend block */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
793 R2 DM_HEADER *header_ptr; /* Pointer to memory hdr */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
794 R4 DM_HEADER *new_ptr; /* New memory block pointer */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
795 UNSIGNED size; /* Suspended task request */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
796 UNSIGNED free_size; /* Amount of free bytes */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
797 STATUS preempt; /* Preemption flag */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
798 STATUS status; /* Completion status */ |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
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|
799 NU_SUPERV_USER_VARIABLES |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
800 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
801 /* Switch to supervisor mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
802 NU_SUPERVISOR_MODE(); |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
803 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
804 #ifdef NU_ENABLE_STACK_CHECK |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
805 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
806 /* Call stack checking function to check for an overflow condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
807 TCT_Check_Stack(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
808 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
809 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
810 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
811 #ifdef NU_ENABLE_HISTORY |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
812 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
813 /* Make an entry that corresponds to this function in the system history |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
814 log. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
815 HIC_Make_History_Entry(NU_DEALLOCATE_MEMORY_ID, (UNSIGNED) memory, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
816 (UNSIGNED) 0, (UNSIGNED) 0); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
817 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
818 #endif |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
819 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
820 /* Initialize the status as successful. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
821 status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
822 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
823 /* Pickup the associated pool's pointer. It is inside the header of |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
824 each memory. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
825 header_ptr = (DM_HEADER *) (((BYTE_PTR) memory) - DM_OVERHEAD); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
826 pool = header_ptr -> dm_memory_pool; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
827 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
828 /* Protect against simultaneous access to the memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
829 TCT_Protect(&(pool -> dm_protect)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
830 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
831 /* Mark the memory as available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
832 header_ptr -> dm_memory_free = NU_TRUE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
833 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
834 /* Adjust the available number of bytes. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
835 pool -> dm_available = pool -> dm_available + |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
836 (((BYTE_PTR) (header_ptr -> dm_next_memory)) - |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
837 ((BYTE_PTR) header_ptr)) - DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
838 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
839 /* Determine if the block can be merged with the previous neighbor. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
840 if ((header_ptr -> dm_previous_memory) -> dm_memory_free) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
841 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
842 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
843 /* Adjust the available number of bytes. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
844 pool -> dm_available = pool -> dm_available + DM_OVERHEAD; |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
845 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
846 /* Yes, merge block with previous neighbor. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
847 (header_ptr -> dm_previous_memory) -> dm_next_memory = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
848 header_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
849 (header_ptr -> dm_next_memory) -> dm_previous_memory = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
850 header_ptr -> dm_previous_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
851 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
852 /* Move header pointer to previous. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
853 header_ptr = header_ptr -> dm_previous_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
854 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
855 /* Adjust the search pointer to the new merged block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
856 pool -> dm_search_ptr = header_ptr; |
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beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
857 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
858 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
859 /* Determine if the block can be merged with the next neighbor. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
860 if ((header_ptr -> dm_next_memory) -> dm_memory_free) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
861 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
862 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
863 /* Adjust the available number of bytes. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
864 pool -> dm_available = pool -> dm_available + DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
865 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
866 /* Yes, merge block with next neighbor. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
867 new_ptr = header_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
868 (new_ptr -> dm_next_memory) -> dm_previous_memory = |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
869 header_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
870 header_ptr -> dm_next_memory = new_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
871 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
872 /* Adjust the search pointer to the new merged block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
873 pool -> dm_search_ptr = header_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
874 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
875 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
876 #ifdef INCLUDE_PROVIEW |
947b1f473960
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
877 _RTProf_DumpMemoryPool(RT_PROF_DEALLOCATE_MEMORY,pool,RT_PROF_OK); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
878 #endif /*INCLUDE_PROVIEW*/ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
879 /* Determine if another task is waiting for memory from the pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
880 suspend_ptr = pool -> dm_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
881 preempt = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
882 while (suspend_ptr) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
883 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
884 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
885 /* Yes, another task is waiting for memory from the pool. Search |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
886 the pool in the same manner as the memory allocation function. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
887 size = suspend_ptr -> dm_request_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
888 header_ptr = pool -> dm_search_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
889 do |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
890 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
891 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
892 /* Determine if the block is free and if it can satisfy the request |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
893 of the first task waiting. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
894 if (header_ptr -> dm_memory_free) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
895 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
896 /* Calculate the free block size. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
897 free_size = (((BYTE_PTR) (header_ptr -> dm_next_memory)) - |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
898 ((BYTE_PTR) header_ptr)) - DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
899 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
900 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
901 /* There are no free bytes available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
902 free_size = 0; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
903 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
904 /* Determine if the search should continue. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
905 if (free_size < size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
906 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
907 /* Large enough block has not been found. Move the search |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
908 pointer to the next block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
909 header_ptr = header_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
910 } while((free_size < size) && (header_ptr != pool -> dm_search_ptr)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
911 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
912 /* Determine if the memory is available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
913 if (free_size >= size) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
914 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
915 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
916 /* A block that satisfies the request has been found. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
917 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
918 /* Determine if the block needs to be split. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
919 if (free_size >= (size + DM_OVERHEAD + pool -> dm_min_allocation)) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
920 { |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
921 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
922 /* Yes, split the block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
923 new_ptr = (DM_HEADER *) (((BYTE_PTR) header_ptr) + size + |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
924 DM_OVERHEAD); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
925 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
926 /* Mark the new block as free. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
927 new_ptr -> dm_memory_free = NU_TRUE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
928 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
929 /* Put the pool pointer into the new block. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
930 new_ptr -> dm_memory_pool = pool; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
931 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
932 /* Build the necessary pointers. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
933 new_ptr -> dm_previous_memory = header_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
934 new_ptr -> dm_next_memory = header_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
935 (new_ptr -> dm_next_memory) -> dm_previous_memory = new_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
936 header_ptr -> dm_next_memory = new_ptr; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
937 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
938 /* Decrement the available byte count. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
939 pool -> dm_available = pool -> dm_available - |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
940 size - DM_OVERHEAD; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
941 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
942 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
943 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
944 /* Decrement the entire free size from the available bytes |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
945 count. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
946 pool -> dm_available = pool -> dm_available - free_size; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
947 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
948 /* Mark the allocated block as not available. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
949 header_ptr -> dm_memory_free = NU_FALSE; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
950 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
951 /* Should the search pointer be moved? */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
952 if (pool -> dm_search_ptr == header_ptr) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
953 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
954 /* Move the search pointer to the next free memory slot. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
955 pool -> dm_search_ptr = header_ptr -> dm_next_memory; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
956 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
957 /* Decrement the number of tasks waiting counter. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
958 pool -> dm_tasks_waiting--; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
959 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
960 /* Remove the first suspended block from the list. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
961 CSC_Remove_From_List((CS_NODE **) &(pool -> dm_suspension_list), |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
962 &(suspend_ptr -> dm_suspend_link)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
963 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
964 /* Setup the appropriate return value. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
965 suspend_ptr -> dm_return_status = NU_SUCCESS; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
966 suspend_ptr -> dm_return_pointer = (VOID *) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
967 (((BYTE_PTR) header_ptr) + DM_OVERHEAD); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
968 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
969 /* Setup system protect while task is being resumed. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
970 TCT_System_Protect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
971 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
972 /* Resume the suspended task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
973 preempt = preempt | |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
974 TCC_Resume_Task((NU_TASK *) suspend_ptr -> dm_suspended_task, |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
975 NU_MEMORY_SUSPEND); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
976 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
977 /* Switch back to the pool protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
978 TCT_Set_Current_Protect(&(pool -> dm_protect)); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
979 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
980 /* Release system protection. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
981 TCT_System_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
982 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
983 /* Pickup the next suspension pointer. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
984 suspend_ptr = pool -> dm_suspension_list; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
985 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
986 else |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
987 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
988 /* Not enough memory for suspended task. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
989 suspend_ptr = NU_NULL; |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
990 } |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
991 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
992 /* Determine if a preempt condition is present. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
993 if (preempt) |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
994 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
995 /* Transfer control to the system if the resumed task function |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
996 detects a preemption condition. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
997 TCT_Control_To_System(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
998 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
999 /* Release protection of the memory pool. */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1000 TCT_Unprotect(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1001 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1002 /* Return to user mode */ |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1003 NU_USER_MODE(); |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1004 |
947b1f473960
beginning of nuc-fw
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1005 /* Return the completion status. */ |
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|
1006 return(status); |
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|
1007 } |
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|
1008 |
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|
1009 |
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|
1010 /*************************************************************************/ |
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|
1011 /* */ |
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|
1012 /* FUNCTION */ |
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|
1013 /* */ |
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|
1014 /* DMC_Cleanup */ |
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|
1015 /* */ |
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|
1016 /* DESCRIPTION */ |
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|
1017 /* */ |
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1018 /* This function is responsible for removing a suspension block */ |
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1019 /* from a memory pool. It is not called unless a timeout or */ |
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|
1020 /* a task terminate is in progress. Note that protection is */ |
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1021 /* already in effect - the same protection at suspension time. */ |
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1022 /* */ |
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1023 /* CALLED BY */ |
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|
1024 /* */ |
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1025 /* TCC_Timeout Task timeout */ |
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1026 /* TCC_Terminate Task terminate */ |
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|
1027 /* */ |
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1028 /* CALLS */ |
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|
1029 /* */ |
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1030 /* CSC_Remove_From_List Remove suspend block from */ |
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|
1031 /* the suspension list */ |
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|
1032 /* */ |
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|
1033 /* INPUTS */ |
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|
1034 /* */ |
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|
1035 /* information Pointer to suspend block */ |
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|
1036 /* */ |
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|
1037 /* OUTPUTS */ |
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|
1038 /* */ |
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|
1039 /* None */ |
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|
1040 /* */ |
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|
1041 /* HISTORY */ |
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|
1042 /* */ |
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diff
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|
1043 /* DATE REMARKS */ |
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|
1044 /* */ |
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|
1045 /* 03-01-1993 Created initial version 1.0 */ |
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|
1046 /* 04-19-1993 Verified version 1.0 */ |
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|
1047 /* */ |
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|
1048 /*************************************************************************/ |
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|
1049 VOID DMC_Cleanup(VOID *information) |
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|
1050 { |
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diff
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|
1051 |
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|
1052 DM_SUSPEND *suspend_ptr; /* Suspension block pointer */ |
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|
1053 NU_SUPERV_USER_VARIABLES |
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|
1054 |
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|
1055 /* Switch to supervisor mode */ |
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|
1056 NU_SUPERVISOR_MODE(); |
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|
1057 |
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1058 /* Use the information pointer as a suspend pointer. */ |
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|
1059 suspend_ptr = (DM_SUSPEND *) information; |
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|
1060 |
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|
1061 /* By default, indicate that the service timed-out. It really does not |
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|
1062 matter if this function is called from a terminate request since |
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|
1063 the task does not resume. */ |
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|
1064 suspend_ptr -> dm_return_status = NU_TIMEOUT; |
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|
1065 suspend_ptr -> dm_return_pointer = NU_NULL; |
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|
1066 |
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|
1067 /* Decrement the number of tasks waiting counter. */ |
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|
1068 (suspend_ptr -> dm_memory_pool) -> dm_tasks_waiting--; |
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diff
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|
1069 |
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diff
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|
1070 /* Unlink the suspend block from the suspension list. */ |
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|
1071 CSC_Remove_From_List((CS_NODE **) |
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|
1072 &((suspend_ptr -> dm_memory_pool) -> dm_suspension_list), |
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|
1073 &(suspend_ptr -> dm_suspend_link)); |
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diff
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|
1074 |
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diff
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|
1075 /* Return to user mode */ |
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diff
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|
1076 NU_USER_MODE(); |
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diff
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|
1077 } |
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diff
changeset
|
1078 |
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diff
changeset
|
1079 |
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parents:
diff
changeset
|
1080 |
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parents:
diff
changeset
|
1081 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
1082 |
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diff
changeset
|
1083 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff
changeset
|
1084 |