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Diffstat (limited to 'src/mapi/glapi/glthread.c')
| -rw-r--r-- | src/mapi/glapi/glthread.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/mapi/glapi/glthread.c b/src/mapi/glapi/glthread.c new file mode 100644 index 0000000000..f365d17bdd --- /dev/null +++ b/src/mapi/glapi/glthread.c @@ -0,0 +1,263 @@ +/* + * 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. + */ + + +/* + * 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 HAVE_DIX_CONFIG_H +#include <dix-config.h> +#include "glapi/mesa.h" +#else +#include "main/compiler.h" +#endif + +#include "glapi/glthread.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 <errno.h> + +/* + * 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 + +PUBLIC 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 != (int) INIT_MAGIC) { + _glthread_InitTSD(tsd); + } + return pthread_getspecific(tsd->key); +} + + +void +_glthread_SetTSD(_glthread_TSD *tsd, void *ptr) +{ + if (tsd->initMagic != (int) INIT_MAGIC) { + _glthread_InitTSD(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_THREADS + +static void InsteadOf_exit(int nCode) +{ + DWORD dwErr = GetLastError(); +} + +PUBLIC unsigned long +_glthread_GetID(void) +{ + return GetCurrentThreadId(); +} + + +void +_glthread_InitTSD(_glthread_TSD *tsd) +{ + tsd->key = TlsAlloc(); + if (tsd->key == TLS_OUT_OF_INDEXES) { + perror(INIT_TSD_ERROR); + InsteadOf_exit(-1); + } + tsd->initMagic = INIT_MAGIC; +} + + +void +_glthread_DestroyTSD(_glthread_TSD *tsd) +{ + if (tsd->initMagic != INIT_MAGIC) { + return; + } + TlsFree(tsd->key); + tsd->initMagic = 0x0; +} + + +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) { + perror(SET_TSD_ERROR); + InsteadOf_exit(-1); + } +} + +#endif /* WIN32_THREADS */ + +/* + * BeOS threads + */ +#ifdef BEOS_THREADS + +PUBLIC unsigned long +_glthread_GetID(void) +{ + return (unsigned long) find_thread(NULL); +} + +void +_glthread_InitTSD(_glthread_TSD *tsd) +{ + tsd->key = tls_allocate(); + tsd->initMagic = INIT_MAGIC; +} + +void * +_glthread_GetTSD(_glthread_TSD *tsd) +{ + if (tsd->initMagic != (int) INIT_MAGIC) { + _glthread_InitTSD(tsd); + } + return tls_get(tsd->key); +} + +void +_glthread_SetTSD(_glthread_TSD *tsd, void *ptr) +{ + if (tsd->initMagic != (int) INIT_MAGIC) { + _glthread_InitTSD(tsd); + } + tls_set(tsd->key, ptr); +} + +#endif /* BEOS_THREADS */ + + + +#else /* THREADS */ + + +/* + * no-op functions + */ + +PUBLIC 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 */ |