[61] | 1 | /*
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| 2 | * TOPPERS/ASP Kernel
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| 3 | * Toyohashi Open Platform for Embedded Real-Time Systems/
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| 4 | * Advanced Standard Profile Kernel
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| 5 | *
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| 6 | * Copyright (C) 2005-2009 by Embedded and Real-Time Systems Laboratory
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| 7 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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| 8 | *
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| 9 | * ãLì ÒÍCȺÌ(1)`(4)Ìðð½·êÉÀèC{\tgEF
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| 10 | * Ai{\tgEFAðüϵ½àÌðÜÞDȺ¯¶jðgpE¡»Eü
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| 11 | * ÏEÄzziȺCpÆÄÔj·é±Æð³Åø·éD
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| 12 | * (1) {\tgEFAð\[XR[hÌ`Åp·éêÉÍCãLÌì
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| 13 | * \¦C±Ìpð¨æѺL̳ÛØKèªC»ÌÜÜÌ`Å\[
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| 14 | * XR[hÉÜÜêÄ¢é±ÆD
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| 15 | * (2) {\tgEFAðCCu`®ÈÇC¼Ì\tgEFAJÉg
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| 16 | * pÅ«é`ÅÄzz·éêÉÍCÄzzɺ¤hL
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| 17 | gip
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| 18 | * Ò}j
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| 19 | AÈÇjÉCãLÌì \¦C±Ìpð¨æѺL
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| 20 | * ̳ÛØKèðfÚ·é±ÆD
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| 21 | * (3) {\tgEFAðC@íÉgÝÞÈÇC¼Ì\tgEFAJÉg
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| 22 | * pÅ«È¢`ÅÄzz·éêÉÍCÌ¢¸ê©Ìðð½·±
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| 23 | * ÆD
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| 24 | * (a) Äzzɺ¤hL
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| 25 | gipÒ}j
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| 26 | AÈÇjÉCãLÌ
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| 27 | * ì \¦C±Ìpð¨æѺL̳ÛØKèðfÚ·é±ÆD
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| 28 | * (b) ÄzzÌ`ÔðCÊÉèßéû@ÉæÁÄCTOPPERSvWFNgÉ
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| 29 | * ñ·é±ÆD
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| 30 | * (4) {\tgEFAÌpÉæè¼ÚIܽÍÔÚIɶ¶é¢©Èé¹
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| 31 | * Q©çàCãLì Ò¨æÑTOPPERSvWFNgðÆÓ·é±ÆD
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| 32 | * ܽC{\tgEFAÌ[UܽÍGh[U©çÌ¢©Èé
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| 33 | * RÉîÿ©çàCãLì Ò¨æÑTOPPERSvWFNgð
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| 34 | * ÆÓ·é±ÆD
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| 35 | *
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| 36 | * {\tgEFAÍC³ÛØÅñ³êÄ¢éàÌÅ éDãLì Ò¨
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| 37 | * æÑTOPPERSvWFNgÍC{\tgEFAÉÖµÄCÁèÌgpÚI
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| 38 | * ÉηéK«àÜßÄC¢©ÈéÛØàsíÈ¢DܽC{\tgEF
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| 39 | * AÌpÉæè¼ÚIܽÍÔÚIɶ¶½¢©Èé¹QÉÖµÄàC»
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| 40 | * ÌÓCðíÈ¢D
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| 41 | *
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| 42 | * @(#) $Id: mutex.c 1694 2010-01-01 15:59:09Z ertl-hiro $
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| 43 | */
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| 44 |
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| 45 | /*
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| 46 | * ~
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| 47 | [ebNX@\
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| 48 | */
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| 49 |
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| 50 | #include "kernel_impl.h"
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| 51 | #include "check.h"
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| 52 | #include "task.h"
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| 53 | #include "wait.h"
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| 54 | #include "mutex.h"
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| 55 |
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| 56 | /*
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| 57 | * g[XO}NÌftHgè`
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| 58 | */
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| 59 | #ifndef LOG_LOC_MTX_ENTER
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| 60 | #define LOG_LOC_MTX_ENTER(mtxid)
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| 61 | #endif /* LOG_LOC_MTX_ENTER */
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| 62 |
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| 63 | #ifndef LOG_LOC_MTX_LEAVE
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| 64 | #define LOG_LOC_MTX_LEAVE(ercd)
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| 65 | #endif /* LOG_LOC_MTX_LEAVE */
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| 66 |
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| 67 | #ifndef LOG_PLOC_MTX_ENTER
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| 68 | #define LOG_PLOC_MTX_ENTER(mtxid)
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| 69 | #endif /* LOG_PLOC_MTX_ENTER */
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| 70 |
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| 71 | #ifndef LOG_PLOC_MTX_LEAVE
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| 72 | #define LOG_PLOC_MTX_LEAVE(ercd)
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| 73 | #endif /* LOG_PLOC_MTX_LEAVE */
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| 74 |
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| 75 | #ifndef LOG_TLOC_MTX_ENTER
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| 76 | #define LOG_TLOC_MTX_ENTER(mtxid, tmout)
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| 77 | #endif /* LOG_TLOC_MTX_ENTER */
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| 78 |
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| 79 | #ifndef LOG_TLOC_MTX_LEAVE
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| 80 | #define LOG_TLOC_MTX_LEAVE(ercd)
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| 81 | #endif /* LOG_TLOC_MTX_LEAVE */
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| 82 |
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| 83 | #ifndef LOG_UNL_MTX_ENTER
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| 84 | #define LOG_UNL_MTX_ENTER(mtxid)
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| 85 | #endif /* LOG_UNL_MTX_ENTER */
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| 86 |
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| 87 | #ifndef LOG_UNL_MTX_LEAVE
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| 88 | #define LOG_UNL_MTX_LEAVE(ercd)
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| 89 | #endif /* LOG_UNL_MTX_LEAVE */
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| 90 |
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| 91 | #ifndef LOG_INI_MTX_ENTER
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| 92 | #define LOG_INI_MTX_ENTER(mtxid)
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| 93 | #endif /* LOG_INI_MTX_ENTER */
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| 94 |
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| 95 | #ifndef LOG_INI_MTX_LEAVE
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| 96 | #define LOG_INI_MTX_LEAVE(ercd)
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| 97 | #endif /* LOG_INI_MTX_LEAVE */
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| 98 |
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| 99 | #ifndef LOG_REF_MTX_ENTER
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| 100 | #define LOG_REF_MTX_ENTER(mtxid, pk_rmtx)
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| 101 | #endif /* LOG_REF_MTX_ENTER */
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| 102 |
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| 103 | #ifndef LOG_REF_MTX_LEAVE
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| 104 | #define LOG_REF_MTX_LEAVE(ercd, pk_rmtx)
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| 105 | #endif /* LOG_REF_MTX_LEAVE */
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| 106 |
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| 107 | /*
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| 108 | * ~
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| 109 | [ebNXÌ
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| 110 | */
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| 111 | #define tnum_mtx ((uint_t)(tmax_mtxid - TMIN_MTXID + 1))
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| 112 |
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| 113 | /*
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| 114 | * ~
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| 115 | [ebNXID©ç~
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| 116 | [ebNXÇubNðæèo·½ßÌ}N
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| 117 | */
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| 118 | #define INDEX_MTX(mtxid) ((uint_t)((mtxid) - TMIN_MTXID))
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| 119 | #define get_mtxcb(mtxid) (&(mtxcb_table[INDEX_MTX(mtxid)]))
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| 120 |
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| 121 | /*
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| 122 | * ~
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| 123 | [ebNXÇubNÌmutex_queueÖÌ|C^©çC~
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| 124 | [eb
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| 125 | * NXÇubNÖÌ|C^ðæèo·½ßÌ}N
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| 126 | */
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| 127 | #define MTXCB_QUEUE(p_queue) \
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| 128 | ((MTXCB *)(((char *) p_queue) - offsetof(MTXCB, mutex_queue)))
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| 129 |
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| 130 | /*
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| 131 | * ~
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| 132 | [ebNXÌvgRð»f·é}N
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| 133 | */
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| 134 | #define MTXPROTO_MASK 0x03U
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| 135 | #define MTXPROTO(p_mtxcb) ((p_mtxcb)->p_mtxinib->mtxatr & MTXPROTO_MASK)
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| 136 | #define MTX_CEILING(p_mtxcb) (MTXPROTO(p_mtxcb) == TA_CEILING)
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| 137 |
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| 138 | /*
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| 139 | * tbN[`ÄoµpÌÏ
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| 140 | */
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| 141 | #ifdef TOPPERS_mtxhook
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| 142 |
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| 143 | bool_t (*mtxhook_check_ceilpri)(TCB *p_tcb, uint_t bpriority) = NULL;
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| 144 | bool_t (*mtxhook_scan_ceilmtx)(TCB *p_tcb) = NULL;
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| 145 | bool_t (*mtxhook_release_all)(TCB *p_tcb) = NULL;
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| 146 |
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| 147 | #endif /* TOPPERS_mtxhook */
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| 148 |
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| 149 | /*
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| 150 | * ~
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| 151 | [ebNX@\Ìú»
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| 152 | */
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| 153 | #ifdef TOPPERS_mtxini
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| 154 |
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| 155 | void
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| 156 | initialize_mutex(void)
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| 157 | {
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| 158 | uint_t i;
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| 159 | MTXCB *p_mtxcb;
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| 160 |
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| 161 | mtxhook_check_ceilpri = mutex_check_ceilpri;
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| 162 | mtxhook_scan_ceilmtx = mutex_scan_ceilmtx;
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| 163 | mtxhook_release_all = mutex_release_all;
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| 164 |
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| 165 | for (p_mtxcb = mtxcb_table, i = 0; i < tnum_mtx; p_mtxcb++, i++) {
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| 166 | queue_initialize(&(p_mtxcb->wait_queue));
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| 167 | p_mtxcb->p_mtxinib = &(mtxinib_table[i]);
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| 168 | p_mtxcb->p_loctsk = NULL;
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| 169 | }
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| 170 | }
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| 171 |
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| 172 | #endif /* TOPPERS_mtxini */
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| 173 |
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| 174 | /*
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| 175 | * ãÀDæxá½Ì`FbN
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| 176 | */
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| 177 | #ifdef TOPPERS_mtxchk
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| 178 |
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| 179 | bool_t
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| 180 | mutex_check_ceilpri(TCB *p_tcb, uint_t bpriority)
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| 181 | {
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| 182 | QUEUE *p_queue;
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| 183 | MTXCB *p_mtxcb;
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| 184 |
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| 185 | /*
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| 186 | * ^XNªbNµÄ¢éDæxãÀ~
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| 187 | [ebNXÌÅCãÀDæ
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| 188 | * xªbpriorityæèàá¢à̪ êÎCfalseðÔ·D
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| 189 | */
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| 190 | p_queue = p_tcb->mutex_queue.p_next;
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| 191 | while (p_queue != &(p_tcb->mutex_queue)) {
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| 192 | p_mtxcb = MTXCB_QUEUE(p_queue);
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| 193 | if (MTX_CEILING(p_mtxcb) && bpriority < p_mtxcb->p_mtxinib->ceilpri) {
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| 194 | return(false);
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| 195 | }
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| 196 | p_queue = p_queue->p_next;
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| 197 | }
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| 198 |
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| 199 | /*
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| 200 | * ^XNªDæxãÀ~
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| 201 | [ebNXÌbNðÒÁÄ¢éêÉC»
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| 202 | * ÌãÀDæxªbpriorityæèàá¯êÎCfalseðÔ·D
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| 203 | */
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| 204 | if (TSTAT_WAIT_MTX(p_tcb->tstat)) {
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| 205 | p_mtxcb = ((WINFO_MTX *)(p_tcb->p_winfo))->p_mtxcb;
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| 206 | if (MTX_CEILING(p_mtxcb) && bpriority < p_mtxcb->p_mtxinib->ceilpri) {
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| 207 | return(false);
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| 208 | }
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| 209 | }
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| 210 |
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| 211 | /*
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| 212 | * ¢¸êÌðÉàÄÍÜçȯêÎtrueðÔ·D
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| 213 | */
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| 214 | return(true);
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| 215 | }
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| 216 |
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| 217 | #endif /* TOPPERS_mtxchk */
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| 218 |
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| 219 | /*
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| 220 | * DæxãÀ~
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| 221 | [ebNXðbNµÄ¢é©Ì`FbN
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| 222 | */
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| 223 | #ifdef TOPPERS_mtxscan
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| 224 |
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| 225 | bool_t
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| 226 | mutex_scan_ceilmtx(TCB *p_tcb)
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| 227 | {
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| 228 | QUEUE *p_queue;
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| 229 | MTXCB *p_mtxcb;
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| 230 |
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| 231 | p_queue = p_tcb->mutex_queue.p_next;
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| 232 | while (p_queue != &(p_tcb->mutex_queue)) {
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| 233 | p_mtxcb = MTXCB_QUEUE(p_queue);
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| 234 | if (MTX_CEILING(p_mtxcb)) {
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| 235 | return(true);
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| 236 | }
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| 237 | p_queue = p_queue->p_next;
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| 238 | }
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| 239 | return(false);
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| 240 | }
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| 241 |
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| 242 | #endif /* TOPPERS_mtxscan */
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| 243 |
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| 244 | /*
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| 245 | * ^XNÌ»ÝDæxÌvZ
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| 246 | */
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| 247 | #ifdef TOPPERS_mtxcalc
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| 248 |
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| 249 | uint_t
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| 250 | mutex_calc_priority(TCB *p_tcb)
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| 251 | {
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| 252 | uint_t priority;
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| 253 | QUEUE *p_queue;
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| 254 | MTXCB *p_mtxcb;
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| 255 |
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| 256 | priority = p_tcb->bpriority;
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| 257 | p_queue = p_tcb->mutex_queue.p_next;
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| 258 | while (p_queue != &(p_tcb->mutex_queue)) {
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| 259 | p_mtxcb = MTXCB_QUEUE(p_queue);
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| 260 | if (MTX_CEILING(p_mtxcb) && p_mtxcb->p_mtxinib->ceilpri < priority) {
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| 261 | priority = p_mtxcb->p_mtxinib->ceilpri;
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| 262 | }
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| 263 | p_queue = p_queue->p_next;
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| 264 | }
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| 265 | return(priority);
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| 266 | }
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| 267 |
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| 268 | #endif /* TOPPERS_mtxcalc */
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| 269 |
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| 270 | /*
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| 271 | * vfDæxªãªéiܽͦéjêÌ»ÝDæxÏX
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| 272 | */
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| 273 | Inline bool_t
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| 274 | mutex_raise_priority(TCB *p_tcb, uint_t newpri)
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| 275 | {
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| 276 | if (newpri < p_tcb->priority) {
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| 277 | return(change_priority(p_tcb, newpri, true));
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| 278 | }
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| 279 | return(false);
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| 280 | }
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| 281 |
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| 282 | /*
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| 283 | * vfDæxªºªéiܽ͸éjêÌ»ÝDæxÏX
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| 284 | */
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| 285 | Inline bool_t
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| 286 | mutex_drop_priority(TCB *p_tcb, uint_t oldpri)
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| 287 | {
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| 288 | uint_t newpri;
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| 289 |
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| 290 | if (oldpri == p_tcb->priority) {
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| 291 | newpri = mutex_calc_priority(p_tcb);
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| 292 | if (newpri != p_tcb->priority) {
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| 293 | return(change_priority(p_tcb, newpri, true));
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| 294 | }
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| 295 | }
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| 296 | return(false);
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| 297 | }
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| 298 |
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| 299 | /*
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| 300 | * ~
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| 301 | [ebNXðbNµ½êÌ
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| 302 | */
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| 303 | Inline bool_t
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| 304 | mutex_acquire(TCB *p_loctsk, MTXCB *p_mtxcb)
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| 305 | {
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| 306 | p_mtxcb->p_loctsk = p_loctsk;
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| 307 | queue_insert_prev(&(p_loctsk->mutex_queue), &(p_mtxcb->mutex_queue));
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| 308 | if (MTX_CEILING(p_mtxcb)) {
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| 309 | return(mutex_raise_priority(p_loctsk, p_mtxcb->p_mtxinib->ceilpri));
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| 310 | }
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| 311 | return(false);
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| 312 | }
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| 313 |
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| 314 | /*
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| 315 | * ~
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| 316 | [ebNXÌbNð
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| 317 | */
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| 318 | #ifdef TOPPERS_mtxrel
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| 319 |
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| 320 | bool_t
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| 321 | mutex_release(MTXCB *p_mtxcb)
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| 322 | {
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| 323 | TCB *p_tcb;
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| 324 |
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| 325 | if (queue_empty(&(p_mtxcb->wait_queue))) {
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| 326 | p_mtxcb->p_loctsk = NULL;
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| 327 | return(false);
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| 328 | }
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| 329 | else {
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| 330 | /*
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| 331 | * ~
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| 332 | [ebNXÒ¿L
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| 333 | [Ìæª^XNip_tcbjÉC~
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| 334 | [eb
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| 335 | * NXðbN³¹éD
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| 336 | */
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| 337 | p_tcb = (TCB *) queue_delete_next(&(p_mtxcb->wait_queue));
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| 338 | wait_dequeue_tmevtb(p_tcb);
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| 339 | p_tcb->p_winfo->wercd = E_OK;
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| 340 |
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| 341 | p_mtxcb->p_loctsk = p_tcb;
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| 342 | queue_insert_prev(&(p_tcb->mutex_queue), &(p_mtxcb->mutex_queue));
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| 343 | if (MTX_CEILING(p_mtxcb)) {
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| 344 | if (p_mtxcb->p_mtxinib->ceilpri < p_tcb->priority) {
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| 345 | p_tcb->priority = p_mtxcb->p_mtxinib->ceilpri;
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| 346 | }
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| 347 | }
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| 348 | return(make_non_wait(p_tcb));
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| 349 | }
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| 350 | }
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| 351 |
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| 352 | #endif /* TOPPERS_mtxrel */
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| 353 |
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| 354 | /*
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| 355 | * ^XNªbNµÄ¢é·×ÄÌ~
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| 356 | [ebNXÌbNð
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| 357 | */
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| 358 | #ifdef TOPPERS_mtxrela
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| 359 |
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| 360 | bool_t
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| 361 | mutex_release_all(TCB *p_tcb)
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| 362 | {
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| 363 | MTXCB *p_mtxcb;
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| 364 | bool_t dspreq = false;
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| 365 |
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| 366 | while (!queue_empty(&(p_tcb->mutex_queue))) {
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| 367 | p_mtxcb = MTXCB_QUEUE(p_tcb->mutex_queue.p_next);
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| 368 | queue_delete(&(p_mtxcb->mutex_queue));
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| 369 | if (mutex_release(p_mtxcb)) {
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| 370 | dspreq = true;
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| 371 | }
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| 372 | }
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| 373 | return(dspreq);
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| 374 | }
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| 375 |
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| 376 | #endif /* TOPPERS_mtxrela */
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| 377 |
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| 378 | /*
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| 379 | * ~
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| 380 | [ebNXÌbN
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| 381 | */
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| 382 | #ifdef TOPPERS_loc_mtx
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| 383 |
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| 384 | ER
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| 385 | loc_mtx(ID mtxid)
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| 386 | {
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| 387 | MTXCB *p_mtxcb;
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| 388 | WINFO_MTX winfo_mtx;
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| 389 | ER ercd;
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| 390 |
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| 391 | LOG_LOC_MTX_ENTER(mtxid);
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| 392 | CHECK_DISPATCH();
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| 393 | CHECK_MTXID(mtxid);
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| 394 | p_mtxcb = get_mtxcb(mtxid);
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| 395 |
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| 396 | t_lock_cpu();
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| 397 | if (MTX_CEILING(p_mtxcb)
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| 398 | && p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
|
---|
| 399 | ercd = E_ILUSE;
|
---|
| 400 | }
|
---|
| 401 | else if (p_mtxcb->p_loctsk == NULL) {
|
---|
| 402 | (void) mutex_acquire(p_runtsk, p_mtxcb);
|
---|
| 403 | /*
|
---|
| 404 | * DæxãÀ~
|
---|
| 405 | [ebNXðbNµ½êCp_runtskÌDæx
|
---|
| 406 | * ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
|
---|
| 407 | */
|
---|
| 408 | assert(!(p_runtsk != p_schedtsk && dspflg));
|
---|
| 409 | ercd = E_OK;
|
---|
| 410 | }
|
---|
| 411 | else if (p_mtxcb->p_loctsk == p_runtsk) {
|
---|
| 412 | ercd = E_ILUSE;
|
---|
| 413 | }
|
---|
| 414 | else {
|
---|
| 415 | p_runtsk->tstat = (TS_WAITING | TS_WAIT_MTX);
|
---|
| 416 | wobj_make_wait((WOBJCB *) p_mtxcb, (WINFO_WOBJ *) &winfo_mtx);
|
---|
| 417 | dispatch();
|
---|
| 418 | ercd = winfo_mtx.winfo.wercd;
|
---|
| 419 | }
|
---|
| 420 | t_unlock_cpu();
|
---|
| 421 |
|
---|
| 422 | error_exit:
|
---|
| 423 | LOG_LOC_MTX_LEAVE(ercd);
|
---|
| 424 | return(ercd);
|
---|
| 425 | }
|
---|
| 426 |
|
---|
| 427 | #endif /* TOPPERS_loc_mtx */
|
---|
| 428 |
|
---|
| 429 | /*
|
---|
| 430 | * ~
|
---|
| 431 | [ebNXÌbNi|[Oj
|
---|
| 432 | */
|
---|
| 433 | #ifdef TOPPERS_ploc_mtx
|
---|
| 434 |
|
---|
| 435 | ER
|
---|
| 436 | ploc_mtx(ID mtxid)
|
---|
| 437 | {
|
---|
| 438 | MTXCB *p_mtxcb;
|
---|
| 439 | ER ercd;
|
---|
| 440 |
|
---|
| 441 | LOG_PLOC_MTX_ENTER(mtxid);
|
---|
| 442 | CHECK_TSKCTX_UNL();
|
---|
| 443 | CHECK_MTXID(mtxid);
|
---|
| 444 | p_mtxcb = get_mtxcb(mtxid);
|
---|
| 445 |
|
---|
| 446 | t_lock_cpu();
|
---|
| 447 | if (MTX_CEILING(p_mtxcb)
|
---|
| 448 | && p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
|
---|
| 449 | ercd = E_ILUSE;
|
---|
| 450 | }
|
---|
| 451 | else if (p_mtxcb->p_loctsk == NULL) {
|
---|
| 452 | (void) mutex_acquire(p_runtsk, p_mtxcb);
|
---|
| 453 | /*
|
---|
| 454 | * DæxãÀ~
|
---|
| 455 | [ebNXðbNµ½êCp_runtskÌDæx
|
---|
| 456 | * ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
|
---|
| 457 | */
|
---|
| 458 | assert(!(p_runtsk != p_schedtsk && dspflg));
|
---|
| 459 | ercd = E_OK;
|
---|
| 460 | }
|
---|
| 461 | else if (p_mtxcb->p_loctsk == p_runtsk) {
|
---|
| 462 | ercd = E_ILUSE;
|
---|
| 463 | }
|
---|
| 464 | else {
|
---|
| 465 | ercd = E_TMOUT;
|
---|
| 466 | }
|
---|
| 467 | t_unlock_cpu();
|
---|
| 468 |
|
---|
| 469 | error_exit:
|
---|
| 470 | LOG_PLOC_MTX_LEAVE(ercd);
|
---|
| 471 | return(ercd);
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | #endif /* TOPPERS_ploc_mtx */
|
---|
| 475 |
|
---|
| 476 | /*
|
---|
| 477 | * ~
|
---|
| 478 | [ebNXÌbNi^CAEg èj
|
---|
| 479 | */
|
---|
| 480 | #ifdef TOPPERS_tloc_mtx
|
---|
| 481 |
|
---|
| 482 | ER
|
---|
| 483 | tloc_mtx(ID mtxid, TMO tmout)
|
---|
| 484 | {
|
---|
| 485 | MTXCB *p_mtxcb;
|
---|
| 486 | WINFO_MTX winfo_mtx;
|
---|
| 487 | TMEVTB tmevtb;
|
---|
| 488 | ER ercd;
|
---|
| 489 |
|
---|
| 490 | LOG_TLOC_MTX_ENTER(mtxid, tmout);
|
---|
| 491 | CHECK_DISPATCH();
|
---|
| 492 | CHECK_MTXID(mtxid);
|
---|
| 493 | CHECK_TMOUT(tmout);
|
---|
| 494 | p_mtxcb = get_mtxcb(mtxid);
|
---|
| 495 |
|
---|
| 496 | t_lock_cpu();
|
---|
| 497 | if (MTX_CEILING(p_mtxcb)
|
---|
| 498 | && p_runtsk->bpriority < p_mtxcb->p_mtxinib->ceilpri) {
|
---|
| 499 | ercd = E_ILUSE;
|
---|
| 500 | }
|
---|
| 501 | else if (p_mtxcb->p_loctsk == NULL) {
|
---|
| 502 | (void) mutex_acquire(p_runtsk, p_mtxcb);
|
---|
| 503 | /*
|
---|
| 504 | * DæxãÀ~
|
---|
| 505 | [ebNXðbNµ½êCp_runtskÌDæx
|
---|
| 506 | * ªãªéÂ\«ª éªCfBXpb`ªKvÉÈé±ÆÍÈ¢D
|
---|
| 507 | */
|
---|
| 508 | assert(!(p_runtsk != p_schedtsk && dspflg));
|
---|
| 509 | ercd = E_OK;
|
---|
| 510 | }
|
---|
| 511 | else if (p_mtxcb->p_loctsk == p_runtsk) {
|
---|
| 512 | ercd = E_ILUSE;
|
---|
| 513 | }
|
---|
| 514 | else if (tmout == TMO_POL) {
|
---|
| 515 | ercd = E_TMOUT;
|
---|
| 516 | }
|
---|
| 517 | else {
|
---|
| 518 | p_runtsk->tstat = (TS_WAITING | TS_WAIT_MTX);
|
---|
| 519 | wobj_make_wait_tmout((WOBJCB *) p_mtxcb, (WINFO_WOBJ *) &winfo_mtx,
|
---|
| 520 | &tmevtb, tmout);
|
---|
| 521 | dispatch();
|
---|
| 522 | ercd = winfo_mtx.winfo.wercd;
|
---|
| 523 | }
|
---|
| 524 | t_unlock_cpu();
|
---|
| 525 |
|
---|
| 526 | error_exit:
|
---|
| 527 | LOG_TLOC_MTX_LEAVE(ercd);
|
---|
| 528 | return(ercd);
|
---|
| 529 | }
|
---|
| 530 |
|
---|
| 531 | #endif /* TOPPERS_tloc_mtx */
|
---|
| 532 |
|
---|
| 533 | /*
|
---|
| 534 | * ~
|
---|
| 535 | [ebNXÌbNð
|
---|
| 536 | */
|
---|
| 537 | #ifdef TOPPERS_unl_mtx
|
---|
| 538 |
|
---|
| 539 | ER
|
---|
| 540 | unl_mtx(ID mtxid)
|
---|
| 541 | {
|
---|
| 542 | MTXCB *p_mtxcb;
|
---|
| 543 | bool_t dspreq = false;
|
---|
| 544 | ER ercd;
|
---|
| 545 |
|
---|
| 546 | LOG_UNL_MTX_ENTER(mtxid);
|
---|
| 547 | CHECK_TSKCTX_UNL();
|
---|
| 548 | CHECK_MTXID(mtxid);
|
---|
| 549 | p_mtxcb = get_mtxcb(mtxid);
|
---|
| 550 |
|
---|
| 551 | t_lock_cpu();
|
---|
| 552 | if (p_mtxcb->p_loctsk != p_runtsk) {
|
---|
| 553 | ercd = E_ILUSE;
|
---|
| 554 | }
|
---|
| 555 | else {
|
---|
| 556 | queue_delete(&(p_mtxcb->mutex_queue));
|
---|
| 557 | if (MTX_CEILING(p_mtxcb)) {
|
---|
| 558 | if (mutex_drop_priority(p_runtsk, p_mtxcb->p_mtxinib->ceilpri)) {
|
---|
| 559 | dspreq = true;
|
---|
| 560 | }
|
---|
| 561 | }
|
---|
| 562 | if (mutex_release(p_mtxcb)) {
|
---|
| 563 | dspreq = true;
|
---|
| 564 | }
|
---|
| 565 | if (dspreq) {
|
---|
| 566 | dispatch();
|
---|
| 567 | }
|
---|
| 568 | ercd = E_OK;
|
---|
| 569 | }
|
---|
| 570 | t_unlock_cpu();
|
---|
| 571 |
|
---|
| 572 | error_exit:
|
---|
| 573 | LOG_UNL_MTX_LEAVE(ercd);
|
---|
| 574 | return(ercd);
|
---|
| 575 | }
|
---|
| 576 |
|
---|
| 577 | #endif /* TOPPERS_unl_mtx */
|
---|
| 578 |
|
---|
| 579 | /*
|
---|
| 580 | * ~
|
---|
| 581 | [ebNXÌú»
|
---|
| 582 | */
|
---|
| 583 | #ifdef TOPPERS_ini_mtx
|
---|
| 584 |
|
---|
| 585 | ER
|
---|
| 586 | ini_mtx(ID mtxid)
|
---|
| 587 | {
|
---|
| 588 | MTXCB *p_mtxcb;
|
---|
| 589 | TCB *p_loctsk;
|
---|
| 590 | bool_t dspreq;
|
---|
| 591 | ER ercd;
|
---|
| 592 |
|
---|
| 593 | LOG_INI_MTX_ENTER(mtxid);
|
---|
| 594 | CHECK_TSKCTX_UNL();
|
---|
| 595 | CHECK_MTXID(mtxid);
|
---|
| 596 | p_mtxcb = get_mtxcb(mtxid);
|
---|
| 597 |
|
---|
| 598 | t_lock_cpu();
|
---|
| 599 | dspreq = init_wait_queue(&(p_mtxcb->wait_queue));
|
---|
| 600 | p_loctsk = p_mtxcb->p_loctsk;
|
---|
| 601 | if (p_loctsk != NULL) {
|
---|
| 602 | queue_delete(&(p_mtxcb->mutex_queue));
|
---|
| 603 | p_mtxcb->p_loctsk = NULL;
|
---|
| 604 | if (MTX_CEILING(p_mtxcb)) {
|
---|
| 605 | if (mutex_drop_priority(p_loctsk, p_mtxcb->p_mtxinib->ceilpri)) {
|
---|
| 606 | dspreq = true;
|
---|
| 607 | }
|
---|
| 608 | }
|
---|
| 609 | }
|
---|
| 610 | if (dspreq) {
|
---|
| 611 | dispatch();
|
---|
| 612 | }
|
---|
| 613 | ercd = E_OK;
|
---|
| 614 | t_unlock_cpu();
|
---|
| 615 |
|
---|
| 616 | error_exit:
|
---|
| 617 | LOG_INI_MTX_LEAVE(ercd);
|
---|
| 618 | return(ercd);
|
---|
| 619 | }
|
---|
| 620 |
|
---|
| 621 | #endif /* TOPPERS_ini_mtx */
|
---|
| 622 |
|
---|
| 623 | /*
|
---|
| 624 | * ~
|
---|
| 625 | [ebNXÌóÔQÆ
|
---|
| 626 | */
|
---|
| 627 | #ifdef TOPPERS_ref_mtx
|
---|
| 628 |
|
---|
| 629 | ER
|
---|
| 630 | ref_mtx(ID mtxid, T_RMTX *pk_rmtx)
|
---|
| 631 | {
|
---|
| 632 | MTXCB *p_mtxcb;
|
---|
| 633 | ER ercd;
|
---|
| 634 |
|
---|
| 635 | LOG_REF_MTX_ENTER(mtxid, pk_rmtx);
|
---|
| 636 | CHECK_TSKCTX_UNL();
|
---|
| 637 | CHECK_MTXID(mtxid);
|
---|
| 638 | p_mtxcb = get_mtxcb(mtxid);
|
---|
| 639 |
|
---|
| 640 | t_lock_cpu();
|
---|
| 641 | pk_rmtx->htskid = (p_mtxcb->p_loctsk != NULL) ? TSKID(p_mtxcb->p_loctsk)
|
---|
| 642 | : TSK_NONE;
|
---|
| 643 | pk_rmtx->wtskid = wait_tskid(&(p_mtxcb->wait_queue));
|
---|
| 644 | ercd = E_OK;
|
---|
| 645 | t_unlock_cpu();
|
---|
| 646 |
|
---|
| 647 | error_exit:
|
---|
| 648 | LOG_REF_MTX_LEAVE(ercd, pk_rmtx);
|
---|
| 649 | return(ercd);
|
---|
| 650 | }
|
---|
| 651 |
|
---|
| 652 | #endif /* TOPPERS_ref_mtx */
|
---|