FreeCalypso > hg > freecalypso-sw
annotate gsm-fw/nucleus/evf.c @ 809:4c476f4254c4
aci: psa_sat?.c done
author | Space Falcon <falcon@ivan.Harhan.ORG> |
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date | Sun, 05 Apr 2015 07:31:18 +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 /* evf.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 /* EV - Event Group 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 routines to obtain facts about the Event */ |
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25 /* Group 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 /* EVF_Established_Event_Groups Number of created groups */ |
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34 /* EVF_Event_Group_Pointers Build event group pointer */ |
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35 /* list */ |
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36 /* EVF_Event_Group_Information Retrieve event group info */ |
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37 /* */ |
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38 /* DEPENDENCIES */ |
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39 /* */ |
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40 /* cs_extr.h Common Service functions */ |
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41 /* tc_extr.h Thread Control functions */ |
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42 /* ev_extr.h Event Group functions */ |
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43 /* hi_extr.h History functions */ |
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44 /* */ |
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45 /* HISTORY */ |
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46 /* */ |
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47 /* DATE REMARKS */ |
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48 /* */ |
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49 /* 03-01-1994 Initial version of event fact */ |
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50 /* service file, version 1.1 */ |
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51 /* */ |
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52 /* 03-18-1994 Verified version 1.1 */ |
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53 /* 04-17-1996 updated to version 1.2 */ |
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54 /* 11-18-1996 Protected Informational service */ |
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55 /* from NULL Control Block pointers */ |
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56 /* creating 1.2a. (SPR220) */ |
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57 /* 03-24-1998 Released version 1.3 */ |
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58 /* 03-26-1999 Released 1.11m (new release */ |
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59 /* numbering scheme) */ |
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60 /* 04-17-2002 Released version 1.13m */ |
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61 /* 11-07-2002 Released version 1.14 */ |
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62 /*************************************************************************/ |
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63 #define NU_SOURCE_FILE |
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64 |
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65 |
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66 #include "cs_extr.h" /* Common service functions */ |
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67 #include "tc_extr.h" /* Thread control functions */ |
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68 #include "ev_extr.h" /* Event Group functions */ |
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69 #include "hi_extr.h" /* History functions */ |
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70 |
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71 |
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72 /* Define external inner-component global data references. */ |
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73 |
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74 extern CS_NODE *EVD_Created_Event_Groups_List; |
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75 extern UNSIGNED EVD_Total_Event_Groups; |
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76 extern TC_PROTECT EVD_List_Protect; |
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77 |
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78 |
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79 |
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80 /*************************************************************************/ |
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81 /* */ |
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82 /* FUNCTION */ |
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83 /* */ |
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84 /* EVF_Established_Event_Groups */ |
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85 /* */ |
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86 /* DESCRIPTION */ |
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87 /* */ |
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88 /* This function returns the current number of established */ |
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89 /* event groups. Event groups previously deleted are no longer */ |
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90 /* considered established. */ |
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91 /* */ |
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92 /* CALLED BY */ |
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93 /* */ |
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94 /* Application */ |
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95 /* */ |
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96 /* CALLS */ |
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97 /* */ |
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98 /* [TCT_Check_Stack] Stack checking function */ |
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99 /* */ |
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100 /* INPUTS */ |
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101 /* */ |
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102 /* None */ |
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103 /* */ |
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104 /* OUTPUTS */ |
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105 /* */ |
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106 /* EVD_Total_Event_Groups Number of established */ |
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107 /* event groups */ |
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108 /* */ |
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109 /* HISTORY */ |
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110 /* */ |
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111 /* DATE REMARKS */ |
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112 /* */ |
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113 /* 03-01-1993 Created initial version 1.0 */ |
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114 /* 04-19-1993 Verified version 1.0 */ |
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115 /* 03-01-1994 Modified function interface, */ |
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116 /* resulting in version 1.1 */ |
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117 /* */ |
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118 /* 03-18-1994 Verified version 1.1 */ |
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119 /* */ |
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120 /*************************************************************************/ |
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121 UNSIGNED EVF_Established_Event_Groups(VOID) |
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122 { |
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123 |
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124 |
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125 #ifdef NU_ENABLE_STACK_CHECK |
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126 |
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127 /* Call stack checking function to check for an overflow condition. */ |
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128 TCT_Check_Stack(); |
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129 |
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130 #endif |
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131 |
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132 /* Return the number of established event groups. */ |
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133 return(EVD_Total_Event_Groups); |
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134 } |
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135 |
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136 |
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137 /*************************************************************************/ |
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138 /* */ |
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139 /* FUNCTION */ |
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140 /* */ |
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141 /* EVF_Event_Group_Pointers */ |
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142 /* */ |
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143 /* DESCRIPTION */ |
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144 /* */ |
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145 /* This function builds a list of event group pointers, starting at */ |
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146 /* the specified location. The number of event group pointers */ |
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147 /* placed in the list is equivalent to the total number of */ |
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148 /* event groups or the maximum number of pointers specified in the */ |
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149 /* call. */ |
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150 /* */ |
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151 /* CALLED BY */ |
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152 /* */ |
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153 /* Application */ |
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154 /* */ |
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155 /* CALLS */ |
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156 /* */ |
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157 /* [TCT_Check_Stack] Stack checking function */ |
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158 /* TCT_Protect Protect created list */ |
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159 /* TCT_Unprotect Release protection */ |
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160 /* */ |
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161 /* INPUTS */ |
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162 /* */ |
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163 /* pointer_list Pointer to the list area */ |
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164 /* maximum_pointers Maximum number of pointers */ |
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165 /* */ |
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166 /* OUTPUTS */ |
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167 /* */ |
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168 /* pointers Number of event groups placed*/ |
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169 /* in the list */ |
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170 /* HISTORY */ |
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171 /* */ |
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172 /* DATE REMARKS */ |
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173 /* */ |
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174 /* 03-01-1993 Created initial version 1.0 */ |
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175 /* 04-19-1993 Verified version 1.0 */ |
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176 /* 08-09-1993 Corrected pointer retrieval */ |
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177 /* loop, resulting in version 1.0a */ |
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178 /* 08-09-1993 Verified version 1.0a */ |
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179 /* 03-01-1994 Modified function interface, */ |
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180 /* resulting in version 1.1 */ |
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181 /* */ |
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182 /* 03-18-1994 Verified version 1.1 */ |
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183 /* */ |
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184 /*************************************************************************/ |
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185 UNSIGNED EVF_Event_Group_Pointers(NU_EVENT_GROUP **pointer_list, |
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186 UNSIGNED maximum_pointers) |
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187 { |
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188 CS_NODE *node_ptr; /* Pointer to each GCB */ |
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189 UNSIGNED pointers; /* Number of pointers in list*/ |
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190 NU_SUPERV_USER_VARIABLES |
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191 |
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192 /* Switch to supervisor mode */ |
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193 NU_SUPERVISOR_MODE(); |
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194 |
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195 #ifdef NU_ENABLE_STACK_CHECK |
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196 |
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197 /* Call stack checking function to check for an overflow condition. */ |
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198 TCT_Check_Stack(); |
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199 |
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200 #endif |
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201 |
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202 /* Initialize the number of pointers returned. */ |
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203 pointers = 0; |
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204 |
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205 /* Protect against access to the list of created event groups. */ |
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206 TCT_Protect(&EVD_List_Protect); |
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207 |
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208 /* Loop until all event group pointers are in the list or until |
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209 the maximum list size is reached. */ |
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210 node_ptr = EVD_Created_Event_Groups_List; |
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211 while ((node_ptr) && (pointers < maximum_pointers)) |
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212 { |
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213 |
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214 /* Place the node into the destination list. */ |
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215 *pointer_list++ = (NU_EVENT_GROUP *) node_ptr; |
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216 |
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217 /* Increment the pointers variable. */ |
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218 pointers++; |
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219 |
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220 /* Position the node pointer to the next node. */ |
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221 node_ptr = node_ptr -> cs_next; |
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222 |
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223 /* Determine if the pointer is at the head of the list. */ |
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224 if (node_ptr == EVD_Created_Event_Groups_List) |
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225 |
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226 /* The list search is complete. */ |
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227 node_ptr = NU_NULL; |
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228 } |
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229 |
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230 /* Release protection against access to the list of created |
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231 event groups. */ |
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232 TCT_Unprotect(); |
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233 |
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234 /* Return to user mode */ |
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235 NU_USER_MODE(); |
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236 |
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237 /* Return the number of pointers in the list. */ |
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238 return(pointers); |
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239 } |
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240 |
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241 |
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242 /*************************************************************************/ |
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243 /* */ |
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244 /* FUNCTION */ |
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245 /* */ |
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246 /* EVF_Event_Group_Information */ |
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247 /* */ |
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248 /* DESCRIPTION */ |
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249 /* */ |
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250 /* This function returns information about the specified event */ |
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251 /* group. However, if the supplied event group pointer is invalid, */ |
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252 /* the function simply returns an error status. */ |
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253 /* */ |
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254 /* CALLED BY */ |
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255 /* */ |
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256 /* Application */ |
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257 /* */ |
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258 /* CALLS */ |
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259 /* */ |
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260 /* [TCT_Check_Stack] Stack checking function */ |
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261 /* TCT_System_Protect Protect event group */ |
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262 /* TCT_Unprotect Release protection */ |
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263 /* */ |
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264 /* INPUTS */ |
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265 /* */ |
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266 /* event_group_ptr Pointer to the event group */ |
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267 /* name Destination for the name */ |
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268 /* event_flags Pointer to a variable to hold*/ |
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269 /* the current event flags */ |
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270 /* tasks_waiting Destination for the tasks */ |
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271 /* waiting count */ |
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272 /* first_task Destination for the pointer */ |
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273 /* to the first task waiting */ |
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274 /* */ |
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275 /* OUTPUTS */ |
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276 /* */ |
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277 /* NU_SUCCESS If a valid event group */ |
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278 /* pointer is supplied */ |
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279 /* NU_INVALID_GROUP If event group pointer is */ |
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280 /* not valid */ |
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281 /* */ |
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282 /* HISTORY */ |
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283 /* */ |
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284 /* DATE REMARKS */ |
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285 /* */ |
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286 /* 03-01-1993 Created initial version 1.0 */ |
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287 /* 04-19-1993 Verified version 1.0 */ |
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288 /* 03-01-1994 Modified function interface, */ |
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289 /* resulting in version 1.1 */ |
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290 /* */ |
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291 /* 03-18-1994 Verified version 1.1 */ |
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292 /* 11-18-1996 Corrected SPR220. */ |
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293 /* */ |
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294 /*************************************************************************/ |
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295 STATUS EVF_Event_Group_Information(NU_EVENT_GROUP *event_group_ptr, CHAR *name, |
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296 UNSIGNED *event_flags, UNSIGNED *tasks_waiting, NU_TASK **first_task) |
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297 { |
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298 |
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299 EV_GCB *event_group; /* Event control block ptr */ |
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300 INT i; /* Working integer variable */ |
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301 STATUS completion; /* Completion status */ |
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302 NU_SUPERV_USER_VARIABLES |
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303 |
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304 /* Switch to supervisor mode */ |
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305 NU_SUPERVISOR_MODE(); |
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306 |
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307 /* Move input event group pointer into internal pointer. */ |
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308 event_group = (EV_GCB *) event_group_ptr; |
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309 |
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310 |
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311 #ifdef NU_ENABLE_STACK_CHECK |
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312 |
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313 /* Call stack checking function to check for an overflow condition. */ |
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314 TCT_Check_Stack(); |
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315 |
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316 #endif |
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317 |
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318 /* Determine if this event_group id is valid. */ |
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319 if ((event_group != NU_NULL) && (event_group -> ev_id == EV_EVENT_ID)) |
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320 { |
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321 |
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322 /* Setup protection of the event_group. */ |
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323 TCT_System_Protect(); |
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324 |
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325 /* The event_group pointer is valid. Reflect this in the completion |
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326 status and fill in the actual information. */ |
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327 completion = NU_SUCCESS; |
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328 |
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329 /* Copy the event_group's name. */ |
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330 for (i = 0; i < NU_MAX_NAME; i++) |
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331 *name++ = event_group -> ev_name[i]; |
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332 |
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333 /* Return the current event flags. */ |
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334 *event_flags = event_group -> ev_current_events; |
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335 |
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336 /* Retrieve the number of tasks waiting and the pointer to the |
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337 first task waiting. */ |
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338 *tasks_waiting = event_group -> ev_tasks_waiting; |
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339 if (event_group -> ev_suspension_list) |
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340 |
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341 /* There is a task waiting. */ |
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342 *first_task = (NU_TASK *) |
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343 (event_group -> ev_suspension_list) -> ev_suspended_task; |
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344 else |
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345 |
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346 /* There are no tasks waiting. */ |
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347 *first_task = NU_NULL; |
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348 |
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349 /* Release protection of the event group. */ |
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350 TCT_Unprotect(); |
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351 } |
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352 else |
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353 |
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354 /* Indicate that the event group pointer is invalid. */ |
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355 completion = NU_INVALID_GROUP; |
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356 |
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357 /* Return to user mode */ |
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358 NU_USER_MODE(); |
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359 |
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360 /* Return the appropriate completion status. */ |
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361 return(completion); |
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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 |