FreeCalypso > hg > freecalypso-citrine
annotate nucleus/dmce.c @ 0:75a11d740a02
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author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 09 Jun 2016 00:02:41 +0000 |
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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 /* dmce.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 error checking routines for the functions */ |
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25 /* in the dynamic memory management component. This permits easy */ |
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26 /* removal of the error checking logic when it is not needed. */ |
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27 /* */ |
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28 /* DATA STRUCTURES */ |
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29 /* */ |
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30 /* None */ |
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31 /* */ |
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32 /* FUNCTIONS */ |
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33 /* */ |
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34 /* DMCE_Create_Memory_Pool Create a dynamic memory pool */ |
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35 /* DMCE_Delete_Memory_Pool Delete a dynamic memory pool */ |
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36 /* DMCE_Allocate_Memory Allocate a memory block from */ |
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37 /* a dynamic memory pool */ |
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38 /* DMCE_Deallocate_Memory Deallocate a memory block */ |
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39 /* from a dynamic memory pool */ |
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40 /* */ |
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41 /* DEPENDENCIES */ |
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42 /* */ |
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43 /* cs_extr.h Common Service functions */ |
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44 /* tc_extr.h Thread Control functions */ |
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45 /* dm_extr.h Partition functions */ |
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46 /* */ |
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47 /* HISTORY */ |
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48 /* */ |
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49 /* DATE REMARKS */ |
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50 /* */ |
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51 /* 03-01-1993 Created initial version 1.0 */ |
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52 /* 04-19-1993 Verified version 1.0 */ |
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53 /* 11-01-1993 Corrected call of actual */ |
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54 /* function to delete a memory */ |
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55 /* pool, resulting in version 1.0a */ |
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56 /* 11-01-1993 Verfied version 1.0a */ |
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57 /* 03-01-1994 Changed name original error */ |
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58 /* checking file and changed */ |
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59 /* function interfaces, resulting */ |
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60 /* in version 1.1 */ |
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61 /* */ |
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62 /* 03-18-1994 Verified version 1.1 */ |
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63 /* 04-17-1996 updated to version 1.2 */ |
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64 /* 03-24-1998 Released version 1.3. */ |
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65 /* 04-17-2002 Released version 1.13m */ |
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66 /* 11-07-2002 Released version 1.14 */ |
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67 /*************************************************************************/ |
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68 #define NU_SOURCE_FILE |
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69 |
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70 |
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71 #include "cs_extr.h" /* Common service functions */ |
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72 #include "tc_extr.h" /* Thread control functions */ |
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73 #include "dm_extr.h" /* Dynamic memory functions */ |
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74 |
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75 |
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76 /*************************************************************************/ |
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77 /* */ |
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78 /* FUNCTION */ |
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79 /* */ |
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80 /* DMCE_Create_Memory_Pool */ |
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81 /* */ |
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82 /* DESCRIPTION */ |
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83 /* */ |
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84 /* This function performs error checking on the parameters supplied */ |
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85 /* to the create dynamic memory pool function. */ |
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86 /* */ |
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87 /* CALLED BY */ |
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88 /* */ |
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89 /* Application */ |
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90 /* */ |
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91 /* CALLS */ |
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92 /* */ |
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93 /* DMC_Create_Memory_Pool Actual create dynamic memory */ |
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94 /* pool function */ |
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95 /* */ |
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96 /* INPUTS */ |
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97 /* */ |
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98 /* pool_ptr Memory pool control block */ |
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99 /* pointer */ |
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100 /* name Memory pool name */ |
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101 /* start_address Starting address of the pool */ |
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102 /* pool_size Number of bytes in the pool */ |
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103 /* min_allocation Minimum allocation size */ |
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104 /* suspend_type Suspension type */ |
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105 /* */ |
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106 /* OUTPUTS */ |
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107 /* */ |
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108 /* NU_INVALID_POOL Indicates the pool control */ |
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109 /* block pointer is invalid */ |
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110 /* NU_INVALID_MEMORY Indicates the starting */ |
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111 /* memory address is NULL */ |
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112 /* NU_INVALID_SIZE Indicates that either the */ |
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113 /* pool size and/or the */ |
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114 /* minimum allocation size is */ |
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115 /* invalid */ |
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116 /* NU_INVALID_SUSPEND Indicate the suspension type */ |
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117 /* is invalid */ |
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118 /* */ |
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119 /* HISTORY */ |
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120 /* */ |
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121 /* DATE REMARKS */ |
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122 /* */ |
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123 /* 03-01-1993 Created initial version 1.0 */ |
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124 /* 04-19-1993 Verified version 1.0 */ |
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125 /* 03-01-1994 Modified function interface, */ |
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126 /* resulting in version 1.1 */ |
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127 /* */ |
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128 /* 03-18-1994 Verified version 1.1 */ |
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129 /* */ |
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130 /*************************************************************************/ |
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131 STATUS DMCE_Create_Memory_Pool(NU_MEMORY_POOL *pool_ptr, CHAR *name, |
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132 VOID *start_address, UNSIGNED pool_size, |
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133 UNSIGNED min_allocation, OPTION suspend_type) |
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134 { |
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135 |
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136 DM_PCB *pool; /* Pool control block ptr */ |
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137 STATUS status; /* Completion status */ |
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138 UNSIGNED adjusted_min; /* Adjusted size of minimum */ |
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139 UNSIGNED adjusted_pool; /* Adjusted size of pool */ |
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140 |
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141 |
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142 /* Move input pool pointer into internal pointer. */ |
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143 pool = (DM_PCB *) pool_ptr; |
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144 |
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145 /* Adjust the minimum allocation size to something that is evenly |
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146 divisible by the number of bytes in an UNSIGNED data type. */ |
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147 adjusted_min = ((min_allocation + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * |
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148 sizeof(UNSIGNED); |
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149 |
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150 /* Adjust the pool size to something that is evenly divisible by the |
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151 number of bytes in an UNSIGNED data type. */ |
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152 adjusted_pool = ((pool_size + sizeof(UNSIGNED) - 1)/sizeof(UNSIGNED)) * |
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153 sizeof(UNSIGNED); |
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154 |
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155 /* Check for a NULL dynamic memory pool control block pointer or a control |
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156 block that is already created. */ |
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157 if ((pool == NU_NULL) || (pool -> dm_id == DM_DYNAMIC_ID)) |
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158 |
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159 /* Invalid dynamic memory pool control block pointer. */ |
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160 status = NU_INVALID_POOL; |
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161 |
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162 else if (start_address == NU_NULL) |
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163 |
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164 /* Invalid memory pointer. */ |
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165 status = NU_INVALID_MEMORY; |
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166 |
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167 else if ((adjusted_min == 0) || |
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168 ((adjusted_min + (2 * DM_OVERHEAD)) > adjusted_pool)) |
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169 |
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170 /* Pool could not even accommodate one allocation. */ |
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171 status = NU_INVALID_SIZE; |
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172 |
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173 else if ((suspend_type != NU_FIFO) && (suspend_type != NU_PRIORITY)) |
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174 |
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175 /* Invalid suspension type. */ |
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176 status = NU_INVALID_SUSPEND; |
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177 |
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178 else |
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179 |
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180 /* Call the actual service to create the dynamic memory pool. */ |
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181 status = DMC_Create_Memory_Pool(pool_ptr, name, start_address, |
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182 pool_size, min_allocation, suspend_type); |
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183 |
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184 /* Return completion status. */ |
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185 return(status); |
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186 } |
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187 |
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188 |
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189 /*************************************************************************/ |
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190 /* */ |
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191 /* FUNCTION */ |
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192 /* */ |
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193 /* DMCE_Delete_Memory_Pool */ |
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194 /* */ |
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195 /* DESCRIPTION */ |
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196 /* */ |
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197 /* This function performs error checking on the parameters supplied */ |
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198 /* to the delete dynamic memory pool function. */ |
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199 /* */ |
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200 /* CALLED BY */ |
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201 /* */ |
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202 /* Application */ |
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203 /* */ |
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204 /* CALLS */ |
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205 /* */ |
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206 /* DMC_Delete_Memory_Pool Actual function to delete a */ |
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207 /* dynamic memory pool */ |
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208 /* */ |
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209 /* INPUTS */ |
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210 /* */ |
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211 /* pool_ptr Memory pool control block */ |
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212 /* pointer */ |
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213 /* */ |
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214 /* OUTPUTS */ |
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215 /* */ |
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216 /* NU_INVALID_POOL Indicates the pool pointer */ |
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217 /* is invalid */ |
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218 /* */ |
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219 /* HISTORY */ |
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220 /* */ |
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221 /* DATE REMARKS */ |
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222 /* */ |
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223 /* 03-01-1993 Created initial version 1.0 */ |
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224 /* 04-19-1993 Verified version 1.0 */ |
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225 /* 11-01-1993 Corrected call of actual */ |
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226 /* function to delete a memory */ |
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227 /* pool, resulting in version 1.0a */ |
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228 /* 11-01-1993 Verfied version 1.0a */ |
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229 /* 03-01-1994 Modified function interface, */ |
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230 /* resulting in version 1.1 */ |
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231 /* */ |
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232 /* 03-18-1994 Verified version 1.1 */ |
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233 /* */ |
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234 /*************************************************************************/ |
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235 STATUS DMCE_Delete_Memory_Pool(NU_MEMORY_POOL *pool_ptr) |
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236 { |
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237 |
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238 DM_PCB *pool; /* Pool control block ptr */ |
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239 STATUS status; /* Completion status */ |
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240 |
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241 |
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242 /* Move input pool pointer into internal pointer. */ |
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243 pool = (DM_PCB *) pool_ptr; |
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244 |
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245 /* Determine if the dynamic memory pool pointer is valid. */ |
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246 if ((pool) && (pool -> dm_id == DM_DYNAMIC_ID)) |
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247 |
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248 /* Dynamic memory pool pointer is valid, call the function to |
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249 delete it. */ |
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250 status = DMC_Delete_Memory_Pool(pool_ptr); |
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251 |
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252 else |
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253 |
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254 /* Dynamic memory pool pointer is invalid, indicate in |
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255 completion status. */ |
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256 status = NU_INVALID_POOL; |
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257 |
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258 /* Return completion status. */ |
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259 return(status); |
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260 } |
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261 |
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262 |
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263 /*************************************************************************/ |
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264 /* */ |
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265 /* FUNCTION */ |
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266 /* */ |
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267 /* DMCE_Allocate_Memory */ |
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268 /* */ |
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269 /* DESCRIPTION */ |
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270 /* */ |
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271 /* This function performs error checking on the parameters supplied */ |
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272 /* to the allocate memory function. */ |
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273 /* */ |
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274 /* CALLED BY */ |
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275 /* */ |
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276 /* Application */ |
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277 /* */ |
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278 /* CALLS */ |
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279 /* */ |
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280 /* DMC_Allocate_Memory Actual memory allocation */ |
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281 /* function */ |
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282 /* TCCE_Suspend_Error Check for suspension error */ |
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283 /* */ |
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284 /* INPUTS */ |
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285 /* */ |
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286 /* pool_ptr Memory pool pointer */ |
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287 /* return_pointer Pointer to the destination */ |
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288 /* memory pointer */ |
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289 /* size Number of bytes requested */ |
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290 /* suspend Suspension option if full */ |
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291 /* */ |
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292 /* OUTPUTS */ |
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293 /* */ |
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294 /* NU_INVALID_POOL Indicates the supplied pool */ |
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295 /* pointer is invalid */ |
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296 /* NU_INVALID_POINTER Indicates the return pointer */ |
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297 /* is NULL */ |
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298 /* NU_INVALID_SIZE Indicates the size is 0 or */ |
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299 /* larger than the pool */ |
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300 /* NU_INVALID_SUSPEND Invalid suspension requested */ |
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301 /* */ |
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302 /* HISTORY */ |
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303 /* */ |
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304 /* DATE REMARKS */ |
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305 /* */ |
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306 /* 03-01-1993 Created initial version 1.0 */ |
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307 /* 04-19-1993 Verified version 1.0 */ |
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308 /* 03-01-1994 Modified function interface , */ |
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309 /* resulting in version 1.1 */ |
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310 /* */ |
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311 /* 03-18-1994 Verified version 1.1 */ |
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312 /* */ |
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313 /*************************************************************************/ |
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314 STATUS DMCE_Allocate_Memory(NU_MEMORY_POOL *pool_ptr, VOID **return_pointer, |
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315 UNSIGNED size, UNSIGNED suspend) |
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316 { |
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317 |
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318 DM_PCB *pool; /* Pool control block ptr */ |
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319 STATUS status; /* Completion status */ |
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320 |
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321 |
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322 /* Move input pool pointer into internal pointer. */ |
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323 pool = (DM_PCB *) pool_ptr; |
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324 |
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325 /* Determine if dynamic memory pool pointer is invalid. */ |
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326 if (pool == NU_NULL) |
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327 |
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328 /* Dynamic memory pool pointer is invalid, indicate in |
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329 completion status. */ |
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330 status = NU_INVALID_POOL; |
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331 |
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332 else if (pool -> dm_id != DM_DYNAMIC_ID) |
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333 |
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334 /* Dynamic memory pool pointer is invalid, indicate in |
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335 completion status. */ |
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336 status = NU_INVALID_POOL; |
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337 |
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338 else if (return_pointer == NU_NULL) |
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339 |
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340 /* Return pointer is invalid. */ |
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341 status = NU_INVALID_POINTER; |
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342 |
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343 else if ((size == 0) || |
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344 (size > (pool -> dm_pool_size - (2 * DM_OVERHEAD)))) |
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345 |
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346 /* Return the invalid size error. */ |
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347 status = NU_INVALID_SIZE; |
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348 |
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349 else if ((suspend) && (TCCE_Suspend_Error())) |
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350 |
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351 /* Suspension from an non-task thread. */ |
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352 status = NU_INVALID_SUSPEND; |
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353 |
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354 else |
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355 |
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356 /* Parameters are valid, call actual function. */ |
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357 status = DMC_Allocate_Memory(pool_ptr, return_pointer, size, suspend); |
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358 |
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359 /* Return the completion status. */ |
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360 return(status); |
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361 } |
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362 |
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363 |
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364 /*************************************************************************/ |
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365 /* */ |
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366 /* FUNCTION */ |
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367 /* */ |
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368 /* DMCE_Deallocate_Memory */ |
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369 /* */ |
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370 /* DESCRIPTION */ |
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371 /* */ |
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372 /* This function performs error checking on the parameters supplied */ |
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373 /* to the deallocate memory function. */ |
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374 /* */ |
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375 /* CALLED BY */ |
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376 /* */ |
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377 /* Application */ |
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378 /* */ |
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379 /* CALLS */ |
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380 /* */ |
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381 /* DMC_Deallocate_Memory Actual deallocate memory */ |
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382 /* function */ |
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383 /* */ |
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384 /* INPUTS */ |
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385 /* */ |
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386 /* memory Pointer to dynamic memory */ |
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387 /* */ |
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388 /* OUTPUTS */ |
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389 /* */ |
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390 /* NU_INVALID_POINTER Indicates the supplied */ |
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391 /* pointer is invalid */ |
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392 /* */ |
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393 /* HISTORY */ |
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394 /* */ |
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395 /* DATE REMARKS */ |
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396 /* */ |
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397 /* 03-01-1993 Created initial version 1.0 */ |
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398 /* 04-19-1993 Verified version 1.0 */ |
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399 /* 03-01-1994 Modified function interface, */ |
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400 /* resulting in version 1.1 */ |
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401 /* */ |
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402 /* 03-18-1994 Verified version 1.1 */ |
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403 /* */ |
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404 /*************************************************************************/ |
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405 STATUS DMCE_Deallocate_Memory(VOID *memory) |
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406 { |
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407 |
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408 DM_PCB *pool; /* Pool pointer */ |
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409 DM_HEADER *header_ptr; /* Pointer to memory block */ |
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410 STATUS status; /* Completion status */ |
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411 |
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412 |
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413 /* Pickup the associated pool's pointer. It is inside the header of |
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414 each memory block. */ |
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415 header_ptr = (DM_HEADER *) (((BYTE_PTR) memory) - DM_OVERHEAD); |
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416 |
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417 /* Determine if the pointer(s) are NULL. */ |
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418 if ((header_ptr == NU_NULL) || (memory == NU_NULL)) |
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419 |
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420 /* Dynamic memory pointer is invalid. */ |
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421 status = NU_INVALID_POINTER; |
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422 |
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423 /* Determine if dynamic memory pool pointer is invalid. */ |
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424 else if ((pool = header_ptr -> dm_memory_pool) == NU_NULL) |
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425 |
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426 /* Dynamic memory pointer is invalid, indicate in completion |
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427 status. */ |
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428 status = NU_INVALID_POINTER; |
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429 |
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430 else if (pool -> dm_id != DM_DYNAMIC_ID) |
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431 |
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432 /* Dynamic memory pool pointer is invalid, indicate in completion |
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433 status. */ |
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434 status = NU_INVALID_POINTER; |
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435 |
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436 else if (header_ptr -> dm_memory_free) |
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437 |
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438 /* Dynamic memory is free - must not be allocated. */ |
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439 status = NU_INVALID_POINTER; |
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440 |
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441 else |
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442 |
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443 /* Parameters are valid, call actual function. */ |
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444 status = DMC_Deallocate_Memory(memory); |
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445 |
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446 /* Return the completion status. */ |
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447 return(status); |
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448 } |
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449 |
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450 |
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451 |
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452 |
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453 |
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454 |
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455 |
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456 |