FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/smce.c @ 482:9d80090a9e0c
os_tim_{fl,ir}.c: timer list concurrency interlocks redesigned
to something sensible
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sun, 29 Jun 2014 07:37:22 +0000 |
parents | afceeeb2cba1 |
children |
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 /* smce.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 /* SM - Semaphore 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 core */ |
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25 /* functions of the Semaphore component. This permits easy removal */ |
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26 /* of 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 /* SMCE_Create_Semaphore Create a semaphore */ |
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35 /* SMCE_Delete_Semaphore Delete a semaphore */ |
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36 /* SMCE_Obtain_Semaphore Obtain an instance of a */ |
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37 /* semaphore */ |
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38 /* SMCE_Release_Semaphore Release an instance of a */ |
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39 /* semaphore */ |
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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 /* sm_extr.h Semaphore 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 /* 05-15-1993 Corrected comment problem in */ |
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54 /* the header, making the new */ |
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55 /* version 1.0a */ |
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56 /* 05-15-1993 Verified version 1.0a */ |
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57 /* 03-01-1994 Split original error checking */ |
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58 /* file and changed function */ |
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59 /* interfaces, resulting in */ |
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60 /* 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 "sm_extr.h" /* Semaphore 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 /* */ |
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79 /* FUNCTION */ |
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80 /* */ |
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81 /* SMCE_Create_Semaphore */ |
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82 /* */ |
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83 /* DESCRIPTION */ |
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84 /* */ |
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85 /* This function performs error checking on the parameters supplied */ |
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86 /* to the create semaphore function. */ |
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87 /* */ |
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88 /* CALLED BY */ |
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89 /* */ |
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90 /* Application */ |
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91 /* */ |
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92 /* CALLS */ |
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93 /* */ |
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94 /* SMC_Create_Semaphore Actual semaphore create func.*/ |
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95 /* */ |
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96 /* INPUTS */ |
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97 /* */ |
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98 /* semaphore_ptr Semaphore control block ptr */ |
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99 /* name Semaphore name */ |
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100 /* initial_count Initial semaphore instance */ |
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101 /* count */ |
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102 /* suspend_type Suspension type */ |
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103 /* */ |
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104 /* OUTPUTS */ |
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105 /* */ |
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106 /* NU_INVALID_SEMAPHORE Semaphore control block ptr */ |
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107 /* is NULL */ |
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108 /* NU_INVALID_SUSPEND Semaphore suspension is */ |
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109 /* invalid */ |
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110 /* */ |
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111 /* HISTORY */ |
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112 /* */ |
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113 /* DATE REMARKS */ |
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114 /* */ |
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115 /* 03-01-1993 Created initial version 1.0 */ |
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116 /* 04-19-1993 Verified version 1.0 */ |
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117 /* 03-01-1994 Modified function interface, */ |
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118 /* resulting in version 1.1 */ |
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119 /* */ |
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120 /* 03-18-1994 Verified version 1.1 */ |
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121 /* */ |
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122 /*************************************************************************/ |
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123 STATUS SMCE_Create_Semaphore(NU_SEMAPHORE *semaphore_ptr, CHAR *name, |
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124 UNSIGNED initial_count, OPTION suspend_type) |
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125 { |
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126 |
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127 SM_SCB *semaphore; /* Semaphore control blk ptr */ |
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128 STATUS status; /* Completion status */ |
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129 |
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130 |
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131 /* Move input semaphore pointer into internal pointer. */ |
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132 semaphore = (SM_SCB *) semaphore_ptr; |
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133 |
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134 /* Check for a NULL semaphore pointer or an already created semaphore. */ |
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135 if ((semaphore == NU_NULL) || (semaphore -> sm_id == SM_SEMAPHORE_ID)) |
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136 |
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137 /* Invalid semaphore control block pointer. */ |
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138 status = NU_INVALID_SEMAPHORE; |
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139 |
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140 else if ((suspend_type != NU_FIFO) && (suspend_type != NU_PRIORITY)) |
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141 |
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142 /* Invalid suspension type. */ |
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143 status = NU_INVALID_SUSPEND; |
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144 |
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145 else |
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146 |
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147 /* Call the actual service to create the semaphore. */ |
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148 status = SMC_Create_Semaphore(semaphore_ptr, name, initial_count, |
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149 suspend_type); |
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150 |
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151 /* Return completion status. */ |
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152 return(status); |
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153 } |
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154 |
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155 |
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156 /*************************************************************************/ |
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157 /* */ |
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158 /* FUNCTION */ |
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159 /* */ |
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160 /* SMCE_Delete_Semaphore */ |
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161 /* */ |
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162 /* DESCRIPTION */ |
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163 /* */ |
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164 /* This function performs error checking on the parameters supplied */ |
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165 /* to the delete semaphore function. */ |
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166 /* */ |
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167 /* CALLED BY */ |
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168 /* */ |
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169 /* Application */ |
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170 /* */ |
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171 /* CALLS */ |
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172 /* */ |
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173 /* SMC_Delete_Semaphore Actual delete semaphore func.*/ |
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174 /* */ |
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175 /* INPUTS */ |
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176 /* */ |
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177 /* semaphore_ptr Semaphore control block ptr */ |
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178 /* */ |
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179 /* OUTPUTS */ |
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180 /* */ |
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181 /* NU_INVALID_SEMAPHORE Invalid semaphore pointer */ |
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182 /* */ |
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183 /* HISTORY */ |
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184 /* */ |
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185 /* DATE REMARKS */ |
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186 /* */ |
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187 /* 03-01-1993 Created initial version 1.0 */ |
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188 /* 04-19-1993 Verified version 1.0 */ |
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189 /* 03-01-1994 Modified function interface, */ |
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190 /* resulting in version 1.1 */ |
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191 /* */ |
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192 /* 03-18-1994 Verified version 1.1 */ |
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193 /* */ |
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194 /*************************************************************************/ |
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195 STATUS SMCE_Delete_Semaphore(NU_SEMAPHORE *semaphore_ptr) |
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196 { |
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197 |
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198 SM_SCB *semaphore; /* Semaphore control blk ptr */ |
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199 STATUS status; /* Completion status */ |
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200 |
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201 |
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202 /* Move input semaphore pointer into internal pointer. */ |
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203 semaphore = (SM_SCB *) semaphore_ptr; |
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204 |
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205 /* Determine if the semaphore pointer is valid. */ |
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206 if ((semaphore) && (semaphore -> sm_id == SM_SEMAPHORE_ID)) |
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|
207 |
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208 /* Semaphore pointer is valid, call function to delete it. */ |
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209 status = SMC_Delete_Semaphore(semaphore_ptr); |
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|
210 |
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|
211 else |
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|
212 |
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213 /* Semaphore pointer is invalid, indicate in completion status. */ |
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214 status = NU_INVALID_SEMAPHORE; |
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|
215 |
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216 /* Return completion status. */ |
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217 return(status); |
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218 } |
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219 |
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220 |
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221 /*************************************************************************/ |
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222 /* */ |
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223 /* FUNCTION */ |
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224 /* */ |
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225 /* SMCE_Obtain_Semaphore */ |
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226 /* */ |
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227 /* DESCRIPTION */ |
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228 /* */ |
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229 /* This function performs error checking on the parameters supplied */ |
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230 /* to the obtain semaphore function. */ |
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231 /* */ |
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232 /* CALLED BY */ |
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233 /* */ |
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234 /* Application */ |
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235 /* */ |
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236 /* CALLS */ |
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237 /* */ |
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238 /* SMC_Obtain_Semaphore Actual function to obtain an */ |
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239 /* instance of the semaphore */ |
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240 /* TCCE_Suspend_Error Check for illegal suspend */ |
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241 /* */ |
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242 /* INPUTS */ |
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243 /* */ |
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244 /* semaphore_ptr Semaphore control block ptr */ |
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245 /* suspend Suspension option if full */ |
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246 /* */ |
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247 /* OUTPUTS */ |
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248 /* */ |
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249 /* NU_INVALID_SEMAPHORE Invalid semaphore pointer */ |
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250 /* NU_INVALID_SUSPEND Suspension from non-task */ |
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251 /* */ |
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252 /* HISTORY */ |
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253 /* */ |
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254 /* DATE REMARKS */ |
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255 /* */ |
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256 /* 03-01-1993 Created initial version 1.0 */ |
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257 /* 04-19-1993 Verified version 1.0 */ |
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258 /* 03-01-1994 Modified function interface, */ |
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259 /* resulting in version 1.1 */ |
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260 /* */ |
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261 /* 03-18-1994 Verified version 1.1 */ |
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262 /* */ |
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263 /*************************************************************************/ |
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264 STATUS SMCE_Obtain_Semaphore(NU_SEMAPHORE *semaphore_ptr, UNSIGNED suspend) |
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265 { |
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266 |
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267 SM_SCB *semaphore; /* Semaphore control blk ptr */ |
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268 STATUS status; /* Completion status */ |
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269 |
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270 |
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271 /* Move input semaphore pointer into internal pointer. */ |
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272 semaphore = (SM_SCB *) semaphore_ptr; |
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273 |
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274 /* Determine if semaphore pointer is invalid. */ |
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275 if (semaphore == NU_NULL) |
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276 |
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277 /* Semaphore pointer is invalid, indicate in completion status. */ |
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278 status = NU_INVALID_SEMAPHORE; |
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279 |
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280 else if (semaphore -> sm_id != SM_SEMAPHORE_ID) |
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281 |
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282 /* Semaphore pointer is invalid, indicate in completion status. */ |
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283 status = NU_INVALID_SEMAPHORE; |
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284 |
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285 else if ((suspend) && (TCCE_Suspend_Error())) |
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286 |
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287 /* Suspension from an non-task thread. */ |
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288 status = NU_INVALID_SUSPEND; |
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289 |
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290 else |
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291 { |
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292 |
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293 /* Parameters are valid, call actual function. */ |
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294 status = SMC_Obtain_Semaphore(semaphore_ptr, suspend); |
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295 } |
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296 |
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297 /* Return the completion status. */ |
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298 return(status); |
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299 } |
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300 |
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301 |
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302 /*************************************************************************/ |
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303 /* */ |
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304 /* FUNCTION */ |
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305 /* */ |
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306 /* SMCE_Release_Semaphore */ |
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307 /* */ |
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308 /* DESCRIPTION */ |
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309 /* */ |
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310 /* This function performs error checking on the parameters supplied */ |
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311 /* to the release semaphore function. */ |
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312 /* */ |
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313 /* CALLED BY */ |
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314 /* */ |
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315 /* Application */ |
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316 /* */ |
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317 /* CALLS */ |
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318 /* */ |
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319 /* SMC_Release_Semaphore Actual release semaphore fct.*/ |
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320 /* */ |
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321 /* INPUTS */ |
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322 /* */ |
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323 /* semaphore_ptr Semaphore control block ptr */ |
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324 /* */ |
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325 /* OUTPUTS */ |
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326 /* */ |
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327 /* NU_INVALID_SEMAPHORE Invalid semaphore pointer */ |
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328 /* */ |
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329 /* HISTORY */ |
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330 /* */ |
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331 /* DATE REMARKS */ |
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332 /* */ |
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333 /* 03-01-1993 Created initial version 1.0 */ |
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334 /* 04-19-1993 Verified version 1.0 */ |
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335 /* 03-01-1994 Modified function interface, */ |
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336 /* resulting in version 1.1 */ |
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337 /* */ |
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338 /* 03-18-1994 Verified version 1.1 */ |
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339 /* */ |
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340 /*************************************************************************/ |
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341 STATUS SMCE_Release_Semaphore(NU_SEMAPHORE *semaphore_ptr) |
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342 { |
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343 |
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344 SM_SCB *semaphore; /* Semaphore control blk ptr */ |
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345 STATUS status; /* Completion status */ |
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346 |
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347 |
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348 /* Move input semaphore pointer into internal pointer. */ |
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349 semaphore = (SM_SCB *) semaphore_ptr; |
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350 |
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351 /* Determine if semaphore pointer is invalid. */ |
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352 if (semaphore == NU_NULL) |
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353 |
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354 /* Semaphore pointer is invalid, indicate in completion status. */ |
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355 status = NU_INVALID_SEMAPHORE; |
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356 |
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357 else if (semaphore -> sm_id != SM_SEMAPHORE_ID) |
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358 |
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359 /* Semaphore pointer is invalid, indicate in completion status. */ |
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360 status = NU_INVALID_SEMAPHORE; |
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361 |
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362 else |
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363 { |
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364 |
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365 /* Parameters are valid, call actual function. */ |
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366 status = SMC_Release_Semaphore(semaphore_ptr); |
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367 } |
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368 |
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369 /* Return the completion status. */ |
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370 return(status); |
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371 } |
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372 |
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373 |
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374 |
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375 |
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376 |
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377 |