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This commit is contained in:
Brian Paul
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2 changed files with 388 additions and 0 deletions
243
src/mesa/glapi/glthread.c
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243
src/mesa/glapi/glthread.c
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/* $Id: glthread.c,v 1.1 1999/12/16 17:31:06 brianp Exp $ */
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/*
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* Mesa 3-D graphics library
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* Version: 3.3
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*
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* Copyright (C) 1999 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Thread support for gl dispatch.
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*
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* Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
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* and Christoph Poliwoda (poliwoda@volumegraphics.com)
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*
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* Revised by Keith Whitwell
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* Adapted for new gl dispatcher by Brian Paul
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*/
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#ifdef PC_ALL
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#include "all.h"
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#else
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#include "glheader.h"
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#endif
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/*
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* This file should still compile even when THREADS is not defined.
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* This is to make things easier to deal with on the makefile scene..
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*/
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#ifdef THREADS
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#include <errno.h>
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#include "glthread.h"
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/*
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* Error messages
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*/
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#define INIT_TSD_ERROR "_glthread_: failed to allocate key for thread specific data"
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#define GET_TSD_ERROR "_glthread_: failed to get thread specific data"
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#define SET_TSD_ERROR "_glthread_: thread failed to set thread specific data"
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/*
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* magic number for win32 and solaris threads equivalents of pthread_once
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* This could probably be done better, but we haven't figured out how yet.
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*/
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#define INITFUNC_CALLED_MAGIC 0xff8adc98
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/*
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* POSIX Threads -- The best way to go if your platform supports them.
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* Solaris >= 2.5 have POSIX threads, IRIX >= 6.4 reportedly
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* has them, and many of the free Unixes now have them.
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* Be sure to use appropriate -mt or -D_REENTRANT type
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* compile flags when building.
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*/
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#ifdef PTHREADS
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unsigned long
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_glthread_GetID(void)
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{
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return (unsigned long) pthread_self();
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}
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void
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_glthread_InitTSD(_glthread_TSD *tsd)
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{
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if (pthread_key_create(&tsd->key, free) != 0) {
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perror(INIT_TSD_ERROR);
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exit(-1);
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}
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}
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void *
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_glthread_GetTSD(_glthread_TSD *tsd)
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{
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return pthread_getspecific(tsd->key);
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}
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void
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_glthread_SetTSD(_glthread_TSD *tsd, void *ptr, void (*initfunc)(void))
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{
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pthread_once(&tsd->once, initfunc);
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if (pthread_setspecific(tsd->key, ptr) != 0) {
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perror(SET_TSD_ERROR);
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exit(-1);
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};
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}
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#endif /* PTHREADS */
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/*
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* Solaris/Unix International Threads -- Use only if POSIX threads
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* aren't available on your Unix platform. Solaris 2.[34] are examples
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* of platforms where this is the case. Be sure to use -mt and/or
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* -D_REENTRANT when compiling.
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*/
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#ifdef SOLARIS_THREADS
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#define USE_LOCK_FOR_KEY /* undef this to try a version without
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lock for the global key... */
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unsigned long
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_glthread_GetID(void)
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{
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abort(); /* XXX not implemented yet */
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return (unsigned long) 0;
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}
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void
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_glthread_InitTSD(_glthread_TSD *tsd)
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{
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if ((errno = mutex_init(&tsd->keylock, 0, NULL)) != 0 ||
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(errno = thr_keycreate(&(tsd->key), free)) != 0) {
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perror(INIT_TSD_ERROR);
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exit(-1);
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}
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}
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void *
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_glthread_GetTSD(_glthread_TSD *tsd)
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{
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void* ret;
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#ifdef USE_LOCK_FOR_KEY
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mutex_lock(&tsd->keylock);
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thr_getspecific(tsd->key, &ret);
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mutex_unlock(&tsd->keylock);
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#else
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if ((errno = thr_getspecific(tsd->key, &ret)) != 0) {
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perror(GET_TSD_ERROR);
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exit(-1);
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};
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#endif
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return ret;
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}
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void
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_glthread_SetTSD(_glthread_TSD *tsd, void *ptr, void (*initfunc)(void))
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{
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/* the following code assumes that the _glthread_TSD has been initialized
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to zero at creation */
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fprintf(stderr, "initfuncCalled = %d\n", tsd->initfuncCalled);
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if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) {
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initfunc();
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tsd->initfuncCalled = INITFUNC_CALLED_MAGIC;
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}
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if ((errno = thr_setspecific(tsd->key, ptr)) != 0) {
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perror(SET_TSD_ERROR);
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exit(-1);
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};
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}
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#undef USE_LOCK_FOR_KEY
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#endif /* SOLARIS_THREADS */
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/*
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* Win32 Threads. The only available option for Windows 95/NT.
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* Be sure that you compile using the Multithreaded runtime, otherwise
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* bad things will happen.
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*/
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#ifdef WIN32
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unsigned long
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_glthread_GetID(void)
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{
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abort(); /* XXX not implemented yet */
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return (unsigned long) 0;
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}
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void
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_glthread_InitTSD(_glthread_TSD *tsd)
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{
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tsd->key = TlsAlloc();
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if (tsd->key == 0xffffffff) {
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/* Can Windows handle stderr messages for non-console
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applications? Does Windows have perror? */
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/* perror(SET_INIT_ERROR);*/
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exit(-1);
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}
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}
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void *
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_glthread_GetTSD(_glthread_TSD *tsd)
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{
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return TlsGetValue(tsd->key);
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}
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void
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_glthread_SetTSD(_glthread_TSD *tsd, void *ptr, void (*initfunc)(void))
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{
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/* the following code assumes that the _glthread_TSD has been initialized
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to zero at creation */
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if (tsd->initfuncCalled != INITFUNC_CALLED_MAGIC) {
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initfunc();
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tsd->initfuncCalled = INITFUNC_CALLED_MAGIC;
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}
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if (TlsSetValue(tsd->key, ptr) == 0) {
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/* Can Windows handle stderr messages for non-console
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applications? Does Windows have perror? */
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/* perror(SET_TSD_ERROR);*/
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exit(-1);
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};
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}
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#endif /* WIN32 */
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#endif /* THREADS */
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145
src/mesa/glapi/glthread.h
Normal file
145
src/mesa/glapi/glthread.h
Normal file
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@ -0,0 +1,145 @@
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/* $Id: glthread.h,v 1.1 1999/12/16 17:31:06 brianp Exp $ */
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/*
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* Mesa 3-D graphics library
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* Version: 3.3
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*
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* Copyright (C) 1999 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Thread support for gl dispatch.
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*
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* Initial version by John Stone (j.stone@acm.org) (johns@cs.umr.edu)
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* and Christoph Poliwoda (poliwoda@volumegraphics.com)
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* Revised by Keith Whitwell
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* Adapted for new gl dispatcher by Brian Paul
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*/
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/*
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* If this file is accidentally included by a non-threaded build,
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* it should not cause the build to fail, or otherwise cause problems.
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* In general, it should only be included when needed however.
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*/
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#ifdef THREADS
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/*
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* It is an error not to select a specific threads API when compiling.
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*/
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#if !defined(PTHREADS) && !defined(SOLARIS_THREADS) && !defined(WIN32)
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#error One of PTHREADS, SOLARIS_THREADS or WIN32 must be defined.
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#endif
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/*
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* POSIX threads. This should be your choice in the Unix world
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* whenever possible. When building with POSIX threads, be sure
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* to enable any compiler flags which will cause the MT-safe
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* libc (if one exists) to be used when linking, as well as any
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* header macros for MT-safe errno, etc. For Solaris, this is the -mt
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* compiler flag. On Solaris with gcc, use -D_REENTRANT to enable
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* proper compiling for MT-safe libc etc.
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*/
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#ifdef PTHREADS
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#include <pthread.h> /* POSIX threads headers */
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typedef struct {
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pthread_key_t key;
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pthread_once_t once;
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} _glthread_TSD;
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typedef pthread_mutex_t _glthread_Mutex;
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typedef pthread_t _glthread_Thread;
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#endif /* PTHREADS */
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/*
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* Solaris threads. Use only up to Solaris 2.4.
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* Solaris 2.5 and higher provide POSIX threads.
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* Be sure to compile with -mt on the Solaris compilers, or
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* use -D_REENTRANT if using gcc.
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*/
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#ifdef SOLARIS_THREADS
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#include <thread.h>
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typedef struct {
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thread_key_t key;
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mutex_t keylock;
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int initfuncCalled;
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} _glthread_TSD;
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typedef mutex_t _glthread_Mutex;
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typedef thread_t _glthread_Thread;
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#endif /* SOLARIS_THREADS */
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/*
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* Windows threads. Should work with Windows NT and 95.
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* IMPORTANT: Link with multithreaded runtime library when THREADS are
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* used!
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*/
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#ifdef WIN32
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#include <windows.h>
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typedef struct {
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DWORD key;
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int initfuncCalled;
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} _glthread_TSD;
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typedef CRITICAL_SECTION _glthread_Mutex;
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typedef HANDLE _glthread_Thread;
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#endif /* WIN32 */
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/*
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* Platform independent thread specific data API.
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*/
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extern unsigned long
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_glthread_GetID(void);
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extern void
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_glthread_InitTSD(_glthread_TSD *);
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extern void *
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_glthread_GetTSD(_glthread_TSD *);
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extern void
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_glthread_SetTSD(_glthread_TSD *, void *, void (*initfunc)(void));
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#endif
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