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Diffstat (limited to 'xc/extras/Mesa/src/glthread.c')
| -rw-r--r-- | xc/extras/Mesa/src/glthread.c | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/xc/extras/Mesa/src/glthread.c b/xc/extras/Mesa/src/glthread.c new file mode 100644 index 000000000..ade862e5c --- /dev/null +++ b/xc/extras/Mesa/src/glthread.c @@ -0,0 +1,246 @@ +/* $Id: glthread.c,v 1.2 2000/01/30 00:27:02 brianp Exp $ */ + +/* + * 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. + */ + + +/* + * Thread support for gl dispatch. + * + * Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu) + * and Christoph Poliwoda (poliwoda@volumegraphics.com) + * + * Revised by Keith Whitwell + * Adapted for new gl dispatcher by Brian Paul + * + * 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" +#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 <errno.h> +#include "glthread.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 for win32 and solaris threads equivalents of pthread_once + * This could probably be done better, but we haven't figured out how yet. + */ +#define INITFUNC_CALLED_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); + } +} + + +void * +_glthread_GetTSD(_glthread_TSD *tsd) +{ + return pthread_getspecific(tsd->key); +} + + +void +_glthread_SetTSD(_glthread_TSD *tsd, void *ptr, void (*initfunc)(void)) +{ + pthread_once(&tsd->once, initfunc); + 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); + } +} + + +void * +_glthread_GetTSD(_glthread_TSD *tsd) +{ + void* ret; +#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, void (*initfunc)(void)) +{ + /* the following code assumes that the _glthread_TSD has been initialized + to zero at creation */ + fprintf(stderr, "initfuncCalled = %d\n", tsd->initfuncCalled); + if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) { + initfunc(); + tsd->initfuncCalled = INITFUNC_CALLED_MAGIC; + } + 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 + +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); + } +} + + +void * +_glthread_GetTSD(_glthread_TSD *tsd) +{ + return TlsGetValue(tsd->key); +} + + +void +_glthread_SetTSD(_glthread_TSD *tsd, void *ptr, void (*initfunc)(void)) +{ + /* the following code assumes that the _glthread_TSD has been initialized + to zero at creation */ + if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) { + initfunc(); + tsd->initfuncCalled = INITFUNC_CALLED_MAGIC; + } + 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 */ + +#endif /* THREADS */ + + |