FreeCalypso > hg > fc-selenite
annotate src/nucleus/smf.c @ 12:e825175be40d
helpers: s/Magnetite/Selenite/
| author | Mychaela Falconia <falcon@freecalypso.org> | 
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| date | Sun, 15 Jul 2018 21:29:27 +0000 | 
| parents | 0f80e1e4dce4 | 
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| rev | line source | 
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| 7 
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changeset | 1 /*************************************************************************/ | 
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changeset | 2 /* */ | 
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changeset | 3 /* Copyright Mentor Graphics Corporation 2002 */ | 
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changeset | 4 /* All Rights Reserved. */ | 
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changeset | 5 /* */ | 
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changeset | 6 /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ | 
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changeset | 7 /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ | 
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changeset | 8 /* SUBJECT TO LICENSE TERMS. */ | 
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changeset | 9 /* */ | 
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changeset | 10 /*************************************************************************/ | 
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changeset | 11 | 
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changeset | 12 /*************************************************************************/ | 
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changeset | 13 /* */ | 
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changeset | 14 /* FILE NAME VERSION */ | 
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changeset | 15 /* */ | 
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changeset | 16 /* smf.c Nucleus PLUS 1.14 */ | 
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changeset | 17 /* */ | 
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changeset | 18 /* COMPONENT */ | 
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changeset | 19 /* */ | 
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changeset | 20 /* SM - Semaphore Management */ | 
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changeset | 21 /* */ | 
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changeset | 22 /* DESCRIPTION */ | 
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changeset | 23 /* */ | 
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changeset | 24 /* This file contains routines to obtain facts about the Semaphore */ | 
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changeset | 25 /* Management component. */ | 
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changeset | 26 /* */ | 
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changeset | 27 /* DATA STRUCTURES */ | 
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changeset | 28 /* */ | 
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changeset | 29 /* None */ | 
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changeset | 30 /* */ | 
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changeset | 31 /* FUNCTIONS */ | 
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changeset | 32 /* */ | 
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changeset | 33 /* SMF_Established_Semaphores Number of created semaphores */ | 
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changeset | 34 /* SMF_Semaphore_Pointers Build semaphore pointer list */ | 
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changeset | 35 /* SMF_Semaphore_Information Retrieve semaphore info */ | 
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changeset | 36 /* */ | 
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changeset | 37 /* DEPENDENCIES */ | 
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changeset | 38 /* */ | 
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changeset | 39 /* cs_extr.h Common Service functions */ | 
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changeset | 40 /* tc_extr.h Thread Control functions */ | 
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changeset | 41 /* sm_extr.h Semaphore functions */ | 
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changeset | 42 /* hi_extr.h History functions */ | 
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changeset | 43 /* */ | 
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changeset | 44 /* HISTORY */ | 
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changeset | 45 /* */ | 
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changeset | 46 /* DATE REMARKS */ | 
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changeset | 47 /* */ | 
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changeset | 48 /* 03-01-1994 Initial version of semaphore */ | 
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changeset | 49 /* fact service file, version 1.1 */ | 
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changeset | 50 /* */ | 
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changeset | 51 /* 03-18-1994 Verified version 1.1 */ | 
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changeset | 52 /* 04-17-1996 updated to version 1.2 */ | 
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changeset | 53 /* 11-18-1996 Protected Informational service */ | 
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changeset | 54 /* from NULL Control Block pointers */ | 
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changeset | 55 /* creating 1.2a. (SPR220) */ | 
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changeset | 56 /* 03-24-1998 Released version 1.3 */ | 
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changeset | 57 /* 03-26-1999 Released 1.11m (new release */ | 
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changeset | 58 /* numbering scheme) */ | 
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changeset | 59 /* 04-17-2002 Released version 1.13m */ | 
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changeset | 60 /* 11-07-2002 Released version 1.14 */ | 
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changeset | 61 /*************************************************************************/ | 
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changeset | 62 #define NU_SOURCE_FILE | 
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changeset | 63 | 
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changeset | 64 | 
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changeset | 65 #include "cs_extr.h" /* Common service functions */ | 
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changeset | 66 #include "tc_extr.h" /* Thread control functions */ | 
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changeset | 67 #include "sm_extr.h" /* Semaphore functions */ | 
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changeset | 68 #include "hi_extr.h" /* History functions */ | 
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changeset | 69 | 
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changeset | 70 | 
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changeset | 71 /* Define external inner-component global data references. */ | 
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changeset | 72 | 
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changeset | 73 extern CS_NODE *SMD_Created_Semaphores_List; | 
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changeset | 74 extern UNSIGNED SMD_Total_Semaphores; | 
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changeset | 75 extern TC_PROTECT SMD_List_Protect; | 
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changeset | 76 | 
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changeset | 77 | 
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changeset | 78 | 
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changeset | 79 /*************************************************************************/ | 
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changeset | 80 /* */ | 
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changeset | 81 /* FUNCTION */ | 
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changeset | 82 /* */ | 
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changeset | 83 /* SMF_Established_Semaphores */ | 
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changeset | 84 /* */ | 
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changeset | 85 /* DESCRIPTION */ | 
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changeset | 86 /* */ | 
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changeset | 87 /* This function returns the current number of established */ | 
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changeset | 88 /* semaphores. Semaphores previously deleted are no longer */ | 
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changeset | 89 /* considered established. */ | 
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changeset | 90 /* */ | 
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changeset | 91 /* CALLED BY */ | 
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changeset | 92 /* */ | 
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changeset | 93 /* Application */ | 
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changeset | 94 /* */ | 
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changeset | 95 /* CALLS */ | 
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changeset | 96 /* */ | 
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changeset | 97 /* [TCT_Check_Stack] Stack checking function */ | 
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changeset | 98 /* */ | 
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changeset | 99 /* INPUTS */ | 
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changeset | 100 /* */ | 
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changeset | 101 /* None */ | 
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changeset | 102 /* */ | 
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changeset | 103 /* OUTPUTS */ | 
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changeset | 104 /* */ | 
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changeset | 105 /* SMD_Total_Semaphores Number of established */ | 
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changeset | 106 /* semaphores */ | 
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changeset | 107 /* */ | 
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changeset | 108 /* HISTORY */ | 
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changeset | 109 /* */ | 
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changeset | 110 /* DATE REMARKS */ | 
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changeset | 111 /* */ | 
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changeset | 112 /* 03-01-1993 Created initial version 1.0 */ | 
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changeset | 113 /* 04-19-1993 Verified version 1.0 */ | 
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changeset | 114 /* 03-01-1994 Modified function interface, */ | 
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changeset | 115 /* resulting in version 1.1 */ | 
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changeset | 116 /* */ | 
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changeset | 117 /* 03-18-1994 Verified version 1.1 */ | 
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changeset | 118 /* */ | 
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changeset | 119 /*************************************************************************/ | 
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changeset | 120 UNSIGNED SMF_Established_Semaphores(VOID) | 
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changeset | 121 { | 
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changeset | 122 | 
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changeset | 123 | 
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changeset | 124 #ifdef NU_ENABLE_STACK_CHECK | 
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changeset | 125 | 
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changeset | 126 /* Call stack checking function to check for an overflow condition. */ | 
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changeset | 127 TCT_Check_Stack(); | 
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changeset | 128 | 
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changeset | 129 #endif | 
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changeset | 130 | 
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changeset | 131 /* Return the number of established semaphores. */ | 
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changeset | 132 return(SMD_Total_Semaphores); | 
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changeset | 133 } | 
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changeset | 134 | 
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changeset | 135 | 
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changeset | 136 /*************************************************************************/ | 
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changeset | 137 /* */ | 
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changeset | 138 /* FUNCTION */ | 
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changeset | 139 /* */ | 
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changeset | 140 /* SMF_Semaphore_Pointers */ | 
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changeset | 141 /* */ | 
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changeset | 142 /* DESCRIPTION */ | 
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changeset | 143 /* */ | 
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changeset | 144 /* This function builds a list of semaphore pointers, starting at */ | 
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changeset | 145 /* the specified location. The number of semaphore pointers */ | 
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changeset | 146 /* placed in the list is equivalent to the total number of */ | 
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changeset | 147 /* semaphores or the maximum number of pointers specified in the */ | 
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changeset | 148 /* call. */ | 
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changeset | 149 /* */ | 
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changeset | 150 /* CALLED BY */ | 
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changeset | 151 /* */ | 
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changeset | 152 /* Application */ | 
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changeset | 153 /* */ | 
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changeset | 154 /* CALLS */ | 
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changeset | 155 /* */ | 
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changeset | 156 /* [TCT_Check_Stack] Stack checking function */ | 
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changeset | 157 /* TCT_Protect Protect created list */ | 
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changeset | 158 /* TCT_Unprotect Release protection */ | 
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changeset | 159 /* */ | 
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changeset | 160 /* INPUTS */ | 
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changeset | 161 /* */ | 
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changeset | 162 /* pointer_list Pointer to the list area */ | 
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changeset | 163 /* maximum_pointers Maximum number of pointers */ | 
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changeset | 164 /* */ | 
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changeset | 165 /* OUTPUTS */ | 
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changeset | 166 /* */ | 
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changeset | 167 /* pointers Number of semaphores placed */ | 
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changeset | 168 /* in the list */ | 
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changeset | 169 /* HISTORY */ | 
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changeset | 170 /* */ | 
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changeset | 171 /* DATE REMARKS */ | 
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changeset | 172 /* */ | 
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changeset | 173 /* 03-01-1993 Created initial version 1.0 */ | 
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changeset | 174 /* 04-19-1993 Verified version 1.0 */ | 
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changeset | 175 /* 08-09-1993 Corrected pointer retrieval */ | 
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changeset | 176 /* loop, resulting in version 1.0a */ | 
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changeset | 177 /* 08-09-1993 Verified version 1.0a */ | 
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changeset | 178 /* 03-01-1994 Modified function interface, */ | 
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changeset | 179 /* resulting in version 1.1 */ | 
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changeset | 180 /* */ | 
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changeset | 181 /* 03-18-1994 Verified version 1.1 */ | 
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changeset | 182 /* */ | 
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changeset | 183 /*************************************************************************/ | 
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changeset | 184 UNSIGNED SMF_Semaphore_Pointers(NU_SEMAPHORE **pointer_list, | 
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changeset | 185 UNSIGNED maximum_pointers) | 
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changeset | 186 { | 
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changeset | 187 CS_NODE *node_ptr; /* Pointer to each SMB */ | 
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changeset | 188 UNSIGNED pointers; /* Number of pointers in list*/ | 
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changeset | 189 NU_SUPERV_USER_VARIABLES | 
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changeset | 190 | 
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changeset | 191 /* Switch to supervisor mode */ | 
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changeset | 192 NU_SUPERVISOR_MODE(); | 
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changeset | 193 | 
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changeset | 194 #ifdef NU_ENABLE_STACK_CHECK | 
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changeset | 195 | 
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changeset | 196 /* Call stack checking function to check for an overflow condition. */ | 
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changeset | 197 TCT_Check_Stack(); | 
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changeset | 198 | 
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changeset | 199 #endif | 
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changeset | 200 | 
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changeset | 201 /* Initialize the number of pointers returned. */ | 
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changeset | 202 pointers = 0; | 
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changeset | 203 | 
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changeset | 204 /* Protect against access to the list of created semaphores. */ | 
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changeset | 205 TCT_Protect(&SMD_List_Protect); | 
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changeset | 206 | 
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changeset | 207 /* Loop until all semaphore pointers are in the list or until the maximum | 
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changeset | 208 list size is reached. */ | 
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changeset | 209 node_ptr = SMD_Created_Semaphores_List; | 
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changeset | 210 while ((node_ptr) && (pointers < maximum_pointers)) | 
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changeset | 211 { | 
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changeset | 212 | 
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changeset | 213 /* Place the node into the destination list. */ | 
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changeset | 214 *pointer_list++ = (NU_SEMAPHORE *) node_ptr; | 
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changeset | 215 | 
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changeset | 216 /* Increment the pointers variable. */ | 
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changeset | 217 pointers++; | 
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changeset | 218 | 
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changeset | 219 /* Position the node pointer to the next node. */ | 
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changeset | 220 node_ptr = node_ptr -> cs_next; | 
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changeset | 221 | 
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changeset | 222 /* Determine if the pointer is at the head of the list. */ | 
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changeset | 223 if (node_ptr == SMD_Created_Semaphores_List) | 
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changeset | 224 | 
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changeset | 225 /* The list search is complete. */ | 
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changeset | 226 node_ptr = NU_NULL; | 
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changeset | 227 } | 
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changeset | 228 | 
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changeset | 229 /* Release protection against access to the list of created semaphores. */ | 
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changeset | 230 TCT_Unprotect(); | 
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changeset | 231 | 
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changeset | 232 /* Return to user mode */ | 
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changeset | 233 NU_USER_MODE(); | 
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changeset | 234 | 
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changeset | 235 /* Return the number of pointers in the list. */ | 
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changeset | 236 return(pointers); | 
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changeset | 237 } | 
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changeset | 238 | 
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changeset | 239 | 
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changeset | 240 /*************************************************************************/ | 
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changeset | 241 /* */ | 
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changeset | 242 /* FUNCTION */ | 
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changeset | 243 /* */ | 
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changeset | 244 /* SMF_Semaphore_Information */ | 
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changeset | 245 /* */ | 
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changeset | 246 /* DESCRIPTION */ | 
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changeset | 247 /* */ | 
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changeset | 248 /* This function returns information about the specified semaphore. */ | 
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changeset | 249 /* However, if the supplied semaphore pointer is invalid, the */ | 
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changeset | 250 /* function simply returns an error status. */ | 
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changeset | 251 /* */ | 
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changeset | 252 /* CALLED BY */ | 
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changeset | 253 /* */ | 
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changeset | 254 /* Application */ | 
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changeset | 255 /* */ | 
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changeset | 256 /* CALLS */ | 
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changeset | 257 /* */ | 
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changeset | 258 /* [TCT_Check_Stack] Stack checking function */ | 
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changeset | 259 /* TCT_System_Protect Protect semaphore */ | 
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changeset | 260 /* TCT_Unprotect Release protection */ | 
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changeset | 261 /* */ | 
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changeset | 262 /* INPUTS */ | 
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changeset | 263 /* */ | 
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changeset | 264 /* semaphore_ptr Pointer to the semaphore */ | 
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changeset | 265 /* name Destination for the name */ | 
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changeset | 266 /* current_count Destination for semaphore */ | 
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changeset | 267 /* instance count */ | 
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changeset | 268 /* suspend_type Destination for the type of */ | 
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changeset | 269 /* suspension */ | 
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changeset | 270 /* tasks_waiting Destination for the tasks */ | 
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changeset | 271 /* waiting count */ | 
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changeset | 272 /* first_task Destination for the pointer */ | 
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changeset | 273 /* to the first task waiting */ | 
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changeset | 274 /* */ | 
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changeset | 275 /* OUTPUTS */ | 
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changeset | 276 /* */ | 
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changeset | 277 /* NU_SUCCESS If a valid semaphore pointer */ | 
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changeset | 278 /* is supplied */ | 
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changeset | 279 /* NU_INVALID_SEMAPHORE If semaphore pointer invalid */ | 
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changeset | 280 /* */ | 
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changeset | 281 /* HISTORY */ | 
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changeset | 282 /* */ | 
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changeset | 283 /* DATE REMARKS */ | 
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changeset | 284 /* */ | 
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changeset | 285 /* 03-01-1993 Created initial version 1.0 */ | 
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changeset | 286 /* 04-19-1993 Verified version 1.0 */ | 
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changeset | 287 /* 03-01-1994 Modified function interface, */ | 
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changeset | 288 /* resulting in version 1.1 */ | 
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changeset | 289 /* */ | 
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changeset | 290 /* 03-18-1994 Verified version 1.1 */ | 
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changeset | 291 /* 11-18-1996 Corrected SPR220. */ | 
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changeset | 292 /* */ | 
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changeset | 293 /*************************************************************************/ | 
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changeset | 294 STATUS SMF_Semaphore_Information(NU_SEMAPHORE *semaphore_ptr, CHAR *name, | 
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changeset | 295 UNSIGNED *current_count, OPTION *suspend_type, | 
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changeset | 296 UNSIGNED *tasks_waiting, NU_TASK **first_task) | 
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changeset | 297 { | 
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changeset | 298 | 
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changeset | 299 SM_SCB *semaphore; /* Semaphore control blk ptr */ | 
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changeset | 300 INT i; /* Working integer variable */ | 
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changeset | 301 STATUS completion; /* Completion status */ | 
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changeset | 302 NU_SUPERV_USER_VARIABLES | 
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changeset | 303 | 
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changeset | 304 /* Switch to supervisor mode */ | 
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changeset | 305 NU_SUPERVISOR_MODE(); | 
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changeset | 306 | 
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changeset | 307 /* Move input semaphore pointer into internal pointer. */ | 
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changeset | 308 semaphore = (SM_SCB *) semaphore_ptr; | 
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changeset | 309 | 
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changeset | 310 | 
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changeset | 311 #ifdef NU_ENABLE_STACK_CHECK | 
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changeset | 312 | 
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changeset | 313 /* Call stack checking function to check for an overflow condition. */ | 
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changeset | 314 TCT_Check_Stack(); | 
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changeset | 315 | 
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changeset | 316 #endif | 
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changeset | 317 | 
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changeset | 318 /* Determine if this semaphore id is valid. */ | 
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changeset | 319 if ((semaphore != NU_NULL) && (semaphore -> sm_id == SM_SEMAPHORE_ID)) | 
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changeset | 320 { | 
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changeset | 321 | 
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changeset | 322 /* Setup protection of the semaphore. */ | 
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changeset | 323 TCT_System_Protect(); | 
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changeset | 324 | 
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changeset | 325 /* The semaphore pointer is valid. Reflect this in the completion | 
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changeset | 326 status and fill in the actual information. */ | 
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changeset | 327 completion = NU_SUCCESS; | 
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changeset | 328 | 
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changeset | 329 /* Copy the semaphore's name. */ | 
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changeset | 330 for (i = 0; i < NU_MAX_NAME; i++) | 
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changeset | 331 *name++ = semaphore -> sm_name[i]; | 
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changeset | 332 | 
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changeset | 333 /* Determine the suspension type. */ | 
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changeset | 334 if (semaphore -> sm_fifo_suspend) | 
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changeset | 335 *suspend_type = NU_FIFO; | 
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changeset | 336 else | 
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changeset | 337 *suspend_type = NU_PRIORITY; | 
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changeset | 338 | 
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changeset | 339 /* Return the current semaphore available instance count. */ | 
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changeset | 340 *current_count = semaphore -> sm_semaphore_count; | 
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changeset | 341 | 
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changeset | 342 /* Retrieve the number of tasks waiting and the pointer to the | 
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changeset | 343 first task waiting. */ | 
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changeset | 344 *tasks_waiting = semaphore -> sm_tasks_waiting; | 
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changeset | 345 if (semaphore -> sm_suspension_list) | 
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changeset | 346 | 
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changeset | 347 /* There is a task waiting. */ | 
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changeset | 348 *first_task = (NU_TASK *) | 
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changeset | 349 (semaphore -> sm_suspension_list) -> sm_suspended_task; | 
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changeset | 350 else | 
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changeset | 351 | 
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changeset | 352 /* There are no tasks waiting. */ | 
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changeset | 353 *first_task = NU_NULL; | 
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changeset | 354 | 
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changeset | 355 /* Release protection of the semaphore. */ | 
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changeset | 356 TCT_Unprotect(); | 
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changeset | 357 } | 
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changeset | 358 else | 
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changeset | 359 | 
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changeset | 360 /* Indicate that the semaphore pointer is invalid. */ | 
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changeset | 361 completion = NU_INVALID_SEMAPHORE; | 
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changeset | 362 | 
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changeset | 363 /* Return to user mode */ | 
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changeset | 364 NU_USER_MODE(); | 
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changeset | 365 | 
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changeset | 366 /* Return the appropriate completion status. */ | 
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changeset | 367 return(completion); | 
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changeset | 368 } | 
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changeset | 369 | 
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changeset | 370 | 
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changeset | 371 | 
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changeset | 372 | 
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changeset | 373 | 
