diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/glapi/glthread.c | 243 | ||||
| -rw-r--r-- | src/mesa/glapi/glthread.h | 145 |
2 files changed, 388 insertions, 0 deletions
diff --git a/src/mesa/glapi/glthread.c b/src/mesa/glapi/glthread.c new file mode 100644 index 00000000000..f4a68f21ef1 --- /dev/null +++ b/src/mesa/glapi/glthread.c @@ -0,0 +1,243 @@ +/* $Id: glthread.c,v 1.1 1999/12/16 17:31:06 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.3 + * + * Copyright (C) 1999 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 ([email protected]) ([email protected]) + * and Christoph Poliwoda ([email protected]) + * + * Revised by Keith Whitwell + * Adapted for new gl dispatcher by Brian Paul + */ + + +#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, 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 */ + + diff --git a/src/mesa/glapi/glthread.h b/src/mesa/glapi/glthread.h new file mode 100644 index 00000000000..c1b9f9df355 --- /dev/null +++ b/src/mesa/glapi/glthread.h @@ -0,0 +1,145 @@ +/* $Id: glthread.h,v 1.1 1999/12/16 17:31:06 brianp Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.3 + * + * Copyright (C) 1999 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 ([email protected]) ([email protected]) + * and Christoph Poliwoda ([email protected]) + * Revised by Keith Whitwell + * Adapted for new gl dispatcher by Brian Paul + */ + + + +/* + * If this file is accidentally included by a non-threaded build, + * it should not cause the build to fail, or otherwise cause problems. + * In general, it should only be included when needed however. + */ +#ifdef THREADS +/* + * It is an error not to select a specific threads API when compiling. + */ +#if !defined(PTHREADS) && !defined(SOLARIS_THREADS) && !defined(WIN32) +#error One of PTHREADS, SOLARIS_THREADS or WIN32 must be defined. +#endif + + + +/* + * POSIX threads. This should be your choice in the Unix world + * whenever possible. When building with POSIX threads, be sure + * to enable any compiler flags which will cause the MT-safe + * libc (if one exists) to be used when linking, as well as any + * header macros for MT-safe errno, etc. For Solaris, this is the -mt + * compiler flag. On Solaris with gcc, use -D_REENTRANT to enable + * proper compiling for MT-safe libc etc. + */ +#ifdef PTHREADS +#include <pthread.h> /* POSIX threads headers */ + +typedef struct { + pthread_key_t key; + pthread_once_t once; +} _glthread_TSD; + +typedef pthread_mutex_t _glthread_Mutex; +typedef pthread_t _glthread_Thread; + +#endif /* PTHREADS */ + + + + +/* + * Solaris threads. Use only up to Solaris 2.4. + * Solaris 2.5 and higher provide POSIX threads. + * Be sure to compile with -mt on the Solaris compilers, or + * use -D_REENTRANT if using gcc. + */ +#ifdef SOLARIS_THREADS +#include <thread.h> + +typedef struct { + thread_key_t key; + mutex_t keylock; + int initfuncCalled; +} _glthread_TSD; + +typedef mutex_t _glthread_Mutex; +typedef thread_t _glthread_Thread; + +#endif /* SOLARIS_THREADS */ + + + + +/* + * Windows threads. Should work with Windows NT and 95. + * IMPORTANT: Link with multithreaded runtime library when THREADS are + * used! + */ + +#ifdef WIN32 +#include <windows.h> + +typedef struct { + DWORD key; + int initfuncCalled; +} _glthread_TSD; + +typedef CRITICAL_SECTION _glthread_Mutex; +typedef HANDLE _glthread_Thread; + +#endif /* WIN32 */ + + + + +/* + * Platform independent thread specific data API. + */ + +extern unsigned long +_glthread_GetID(void); + + +extern void +_glthread_InitTSD(_glthread_TSD *); + + +extern void * +_glthread_GetTSD(_glthread_TSD *); + + +extern void +_glthread_SetTSD(_glthread_TSD *, void *, void (*initfunc)(void)); + + + +#endif |