| 1 | /* |
| 2 | * Mesa 3-D graphics library |
| 3 | * Version: 6.5.1 |
| 4 | * |
| 5 | * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 8 | * copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation |
| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
| 12 | * Software is furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included |
| 15 | * in all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * XXX There's probably some work to do in order to make this file |
| 27 | * truly reusable outside of Mesa. |
| 28 | */ |
| 29 | |
| 30 | #ifdef HAVE_DIX_CONFIG_H |
| 31 | #include <dix-config.h> |
| 32 | #include <X11/Xfuncproto.h> |
| 33 | #endif |
| 34 | |
| 35 | #include <stdlib.h> |
| 36 | #include <stdio.h> |
| 37 | #include "glthread.h" |
| 38 | |
| 39 | /* |
| 40 | * This file should still compile even when THREADS is not defined. |
| 41 | * This is to make things easier to deal with on the makefile scene.. |
| 42 | */ |
| 43 | #ifdef THREADS |
| 44 | #include <errno.h> |
| 45 | |
| 46 | /* |
| 47 | * Error messages |
| 48 | */ |
| 49 | #define INIT_TSD_ERROR "_glthread_: failed to allocate key for thread specific data" |
| 50 | #define GET_TSD_ERROR "_glthread_: failed to get thread specific data" |
| 51 | #define SET_TSD_ERROR "_glthread_: thread failed to set thread specific data" |
| 52 | |
| 53 | /* |
| 54 | * Magic number to determine if a TSD object has been initialized. |
| 55 | * Kind of a hack but there doesn't appear to be a better cross-platform |
| 56 | * solution. |
| 57 | */ |
| 58 | #define INIT_MAGIC 0xff8adc98 |
| 59 | |
| 60 | /* |
| 61 | * POSIX Threads -- The best way to go if your platform supports them. |
| 62 | * Solaris >= 2.5 have POSIX threads, IRIX >= 6.4 reportedly |
| 63 | * has them, and many of the free Unixes now have them. |
| 64 | * Be sure to use appropriate -mt or -D_REENTRANT type |
| 65 | * compile flags when building. |
| 66 | */ |
| 67 | #ifdef PTHREADS |
| 68 | |
| 69 | _X_EXPORT unsigned long |
| 70 | _glthread_GetID(void) |
| 71 | { |
| 72 | return (unsigned long) pthread_self(); |
| 73 | } |
| 74 | |
| 75 | void |
| 76 | _glthread_InitTSD(_glthread_TSD * tsd) |
| 77 | { |
| 78 | if (pthread_key_create(&tsd->key, NULL /*free */ ) != 0) { |
| 79 | perror(INIT_TSD_ERROR); |
| 80 | exit(-1); |
| 81 | } |
| 82 | tsd->initMagic = INIT_MAGIC; |
| 83 | } |
| 84 | |
| 85 | void * |
| 86 | _glthread_GetTSD(_glthread_TSD * tsd) |
| 87 | { |
| 88 | if (tsd->initMagic != (int) INIT_MAGIC) { |
| 89 | _glthread_InitTSD(tsd); |
| 90 | } |
| 91 | return pthread_getspecific(tsd->key); |
| 92 | } |
| 93 | |
| 94 | void |
| 95 | _glthread_SetTSD(_glthread_TSD * tsd, void *ptr) |
| 96 | { |
| 97 | if (tsd->initMagic != (int) INIT_MAGIC) { |
| 98 | _glthread_InitTSD(tsd); |
| 99 | } |
| 100 | if (pthread_setspecific(tsd->key, ptr) != 0) { |
| 101 | perror(SET_TSD_ERROR); |
| 102 | exit(-1); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | #endif /* PTHREADS */ |
| 107 | |
| 108 | /* |
| 109 | * Win32 Threads. The only available option for Windows 95/NT. |
| 110 | * Be sure that you compile using the Multithreaded runtime, otherwise |
| 111 | * bad things will happen. |
| 112 | */ |
| 113 | #ifdef WIN32_THREADS |
| 114 | |
| 115 | void |
| 116 | FreeTSD(_glthread_TSD * p) |
| 117 | { |
| 118 | if (p->initMagic == INIT_MAGIC) { |
| 119 | TlsFree(p->key); |
| 120 | p->initMagic = 0; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | void |
| 125 | InsteadOf_exit(int nCode) |
| 126 | { |
| 127 | DWORD dwErr = GetLastError(); |
| 128 | } |
| 129 | |
| 130 | unsigned long |
| 131 | _glthread_GetID(void) |
| 132 | { |
| 133 | return GetCurrentThreadId(); |
| 134 | } |
| 135 | |
| 136 | void |
| 137 | _glthread_InitTSD(_glthread_TSD * tsd) |
| 138 | { |
| 139 | tsd->key = TlsAlloc(); |
| 140 | if (tsd->key == TLS_OUT_OF_INDEXES) { |
| 141 | perror("Mesa:_glthread_InitTSD"); |
| 142 | InsteadOf_exit(-1); |
| 143 | } |
| 144 | tsd->initMagic = INIT_MAGIC; |
| 145 | } |
| 146 | |
| 147 | void * |
| 148 | _glthread_GetTSD(_glthread_TSD * tsd) |
| 149 | { |
| 150 | if (tsd->initMagic != INIT_MAGIC) { |
| 151 | _glthread_InitTSD(tsd); |
| 152 | } |
| 153 | return TlsGetValue(tsd->key); |
| 154 | } |
| 155 | |
| 156 | void |
| 157 | _glthread_SetTSD(_glthread_TSD * tsd, void *ptr) |
| 158 | { |
| 159 | /* the following code assumes that the _glthread_TSD has been initialized |
| 160 | to zero at creation */ |
| 161 | if (tsd->initMagic != INIT_MAGIC) { |
| 162 | _glthread_InitTSD(tsd); |
| 163 | } |
| 164 | if (TlsSetValue(tsd->key, ptr) == 0) { |
| 165 | perror("Mesa:_glthread_SetTSD"); |
| 166 | InsteadOf_exit(-1); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | #endif /* WIN32_THREADS */ |
| 171 | |
| 172 | #else /* THREADS */ |
| 173 | |
| 174 | /* |
| 175 | * no-op functions |
| 176 | */ |
| 177 | |
| 178 | _X_EXPORT unsigned long |
| 179 | _glthread_GetID(void) |
| 180 | { |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | void |
| 185 | _glthread_InitTSD(_glthread_TSD * tsd) |
| 186 | { |
| 187 | (void) tsd; |
| 188 | } |
| 189 | |
| 190 | void * |
| 191 | _glthread_GetTSD(_glthread_TSD * tsd) |
| 192 | { |
| 193 | (void) tsd; |
| 194 | return NULL; |
| 195 | } |
| 196 | |
| 197 | void |
| 198 | _glthread_SetTSD(_glthread_TSD * tsd, void *ptr) |
| 199 | { |
| 200 | (void) tsd; |
| 201 | (void) ptr; |
| 202 | } |
| 203 | |
| 204 | #endif /* THREADS */ |