--- /dev/null
+/* $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 (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
+ */
+
+
+#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 */
+
+
--- /dev/null
+/* $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 (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
+ */
+
+
+
+/*
+ * 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
projects / mesa.git / commitdiff