/* * Mesa 3-D graphics library * Version: 3.3 * * Copyright (C) 1999-2000 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. */ /* * XXX There's probably some work to do in order to make this file * truly reusable outside of Mesa. First, the glheader.h include must go. */ #ifdef PC_ALL #include "all.h" #else #include "glheader.h" #include "glthread.h" #endif /* * 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 _glthread_GetID(void) { return (unsigned long) pthread_self(); } void _glthread_InitTSD(_glthread_TSD *tsd) { if (pthread_key_create(&tsd->key, NULL/*free*/) != 0) { perror(INIT_TSD_ERROR); exit(-1); } tsd->initMagic = INIT_MAGIC; } void * _glthread_GetTSD(_glthread_TSD *tsd) { if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } return pthread_getspecific(tsd->key); } void _glthread_SetTSD(_glthread_TSD *tsd, void *ptr) { if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } if (pthread_setspecific(tsd->key, ptr) != 0) { perror(SET_TSD_ERROR); exit(-1); } } #endif /* PTHREADS */ /* * Solaris/Unix International Threads -- Use only if POSIX threads * aren't available on your Unix platform. Solaris 2.[34] are examples * of platforms where this is the case. Be sure to use -mt and/or * -D_REENTRANT when compiling. */ #ifdef SOLARIS_THREADS #define USE_LOCK_FOR_KEY /* undef this to try a version without lock for the global key... */ unsigned long _glthread_GetID(void) { abort(); /* XXX not implemented yet */ return (unsigned long) 0; } void _glthread_InitTSD(_glthread_TSD *tsd) { if ((errno = mutex_init(&tsd->keylock, 0, NULL)) != 0 || (errno = thr_keycreate(&(tsd->key), free)) != 0) { perror(INIT_TSD_ERROR); exit(-1); } tsd->initMagic = INIT_MAGIC; } void * _glthread_GetTSD(_glthread_TSD *tsd) { void* ret; if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } #ifdef USE_LOCK_FOR_KEY mutex_lock(&tsd->keylock); thr_getspecific(tsd->key, &ret); mutex_unlock(&tsd->keylock); #else if ((errno = thr_getspecific(tsd->key, &ret)) != 0) { perror(GET_TSD_ERROR); exit(-1); } #endif return ret; } void _glthread_SetTSD(_glthread_TSD *tsd, void *ptr) { if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } if ((errno = thr_setspecific(tsd->key, ptr)) != 0) { perror(SET_TSD_ERROR); exit(-1); } } #undef USE_LOCK_FOR_KEY #endif /* SOLARIS_THREADS */ /* * 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_THREADS unsigned long _glthread_GetID(void) { abort(); /* XXX not implemented yet */ return (unsigned long) 0; } void _glthread_InitTSD(_glthread_TSD *tsd) { tsd->key = TlsAlloc(); if (tsd->key == 0xffffffff) { /* Can Windows handle stderr messages for non-console applications? Does Windows have perror? */ /* perror(SET_INIT_ERROR);*/ exit(-1); } tsd->initMagic = INIT_MAGIC; } void * _glthread_GetTSD(_glthread_TSD *tsd) { if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } return TlsGetValue(tsd->key); } void _glthread_SetTSD(_glthread_TSD *tsd, void *ptr) { /* the following code assumes that the _glthread_TSD has been initialized to zero at creation */ if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } if (TlsSetValue(tsd->key, ptr) == 0) { /* Can Windows handle stderr messages for non-console applications? Does Windows have perror? */ /* perror(SET_TSD_ERROR);*/ exit(-1); } } #endif /* WIN32_THREADS */ /* * XFree86 has its own thread wrapper, Xthreads.h * We wrap it again for GL. */ #ifdef XTHREADS unsigned long _glthread_GetID(void) { return (unsigned long) xthread_self(); } void _glthread_InitTSD(_glthread_TSD *tsd) { if (xthread_key_create(&tsd->key, NULL) != 0) { perror(INIT_TSD_ERROR); exit(-1); } tsd->initMagic = INIT_MAGIC; } void * _glthread_GetTSD(_glthread_TSD *tsd) { void *ptr; if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } xthread_get_specific(tsd->key, &ptr); return ptr; } void _glthread_SetTSD(_glthread_TSD *tsd, void *ptr) { if (tsd->initMagic != INIT_MAGIC) { _glthread_InitTSD(tsd); } xthread_set_specific(tsd->key, ptr); } #endif /* XTHREAD */ #else /* THREADS */ /* * no-op functions */ unsigned long _glthread_GetID(void) { return 0; } void _glthread_InitTSD(_glthread_TSD *tsd) { (void) tsd; } void * _glthread_GetTSD(_glthread_TSD *tsd) { (void) tsd; return NULL; } void _glthread_SetTSD(_glthread_TSD *tsd, void *ptr) { (void) tsd; (void) ptr; } #endif /* THREADS */