/* * Mesa 3-D graphics library * Version: 6.5.1 * * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include #include #include "u_compiler.h" #include "u_thread.h" /* * This file should still compile even when THREADS is not defined. * This is to make things easier to deal with on the makefile scene.. */ #ifdef THREADS #include /* * Error messages */ #define INIT_TSD_ERROR "_glthread_: failed to allocate key for thread specific data" #define GET_TSD_ERROR "_glthread_: failed to get thread specific data" #define SET_TSD_ERROR "_glthread_: thread failed to set thread specific data" /* * Magic number to determine if a TSD object has been initialized. * Kind of a hack but there doesn't appear to be a better cross-platform * solution. */ #define INIT_MAGIC 0xff8adc98 /* * POSIX Threads -- The best way to go if your platform supports them. * Solaris >= 2.5 have POSIX threads, IRIX >= 6.4 reportedly * has them, and many of the free Unixes now have them. * Be sure to use appropriate -mt or -D_REENTRANT type * compile flags when building. */ #ifdef PTHREADS unsigned long u_thread_self(void) { return (unsigned long) pthread_self(); } void u_tsd_init(struct u_tsd *tsd) { if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) { perror(INIT_TSD_ERROR); exit(-1); } tsd->initMagic = INIT_MAGIC; } void * u_tsd_get(struct u_tsd *tsd) { if (tsd->initMagic != (int) INIT_MAGIC) { u_tsd_init(tsd); } return pthread_getspecific(tsd->key); } void u_tsd_set(struct u_tsd *tsd, void *ptr) { if (tsd->initMagic != (int) INIT_MAGIC) { u_tsd_init(tsd); } if (pthread_setspecific(tsd->key, ptr) != 0) { perror(SET_TSD_ERROR); exit(-1); } } #endif /* PTHREADS */ /* * Win32 Threads. The only available option for Windows 95/NT. * Be sure that you compile using the Multithreaded runtime, otherwise * bad things will happen. */ #ifdef WIN32 unsigned long u_thread_self(void) { return GetCurrentThreadId(); } void u_tsd_init(struct u_tsd *tsd) { tsd->key = TlsAlloc(); if (tsd->key == TLS_OUT_OF_INDEXES) { perror(INIT_TSD_ERROR); exit(-1); } tsd->initMagic = INIT_MAGIC; } void u_tsd_destroy(struct u_tsd *tsd) { if (tsd->initMagic != INIT_MAGIC) { return; } TlsFree(tsd->key); tsd->initMagic = 0x0; } void * u_tsd_get(struct u_tsd *tsd) { if (tsd->initMagic != INIT_MAGIC) { u_tsd_init(tsd); } return TlsGetValue(tsd->key); } void u_tsd_set(struct u_tsd *tsd, void *ptr) { /* the following code assumes that the struct u_tsd has been initialized to zero at creation */ if (tsd->initMagic != INIT_MAGIC) { u_tsd_init(tsd); } if (TlsSetValue(tsd->key, ptr) == 0) { perror(SET_TSD_ERROR); exit(-1); } } #endif /* WIN32 */ #else /* THREADS */ /* * no-op functions */ unsigned long u_thread_self(void) { return 0; } void u_tsd_init(struct u_tsd *tsd) { (void) tsd; } void * u_tsd_get(struct u_tsd *tsd) { (void) tsd; return NULL; } void u_tsd_set(struct u_tsd *tsd, void *ptr) { (void) tsd; (void) ptr; } #endif /* THREADS */