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-rw-r--r--src/mesa/glapi/glthread.c374
1 files changed, 374 insertions, 0 deletions
diff --git a/src/mesa/glapi/glthread.c b/src/mesa/glapi/glthread.c
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+++ b/src/mesa/glapi/glthread.c
@@ -0,0 +1,374 @@
+/*
+ * 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.
+ */
+
+
+#include "glheader.h"
+#include "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
+
+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 */
+
+
+
+/*
+ * 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);
+ }
+ tsd->initMagic = INIT_MAGIC;
+}
+
+
+void *
+_glthread_GetTSD(_glthread_TSD *tsd)
+{
+ void* ret;
+ if (tsd->initMagic != INIT_MAGIC) {
+ _glthread_InitTSD(tsd);
+ }
+#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)
+{
+ if (tsd->initMagic != INIT_MAGIC) {
+ _glthread_InitTSD(tsd);
+ }
+ 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_THREADS
+
+void FreeTSD(_glthread_TSD *p)
+{
+ if (p->initMagic==INIT_MAGIC) {
+ TlsFree(p->key);
+ p->initMagic=0;
+ }
+}
+
+void InsteadOf_exit(int nCode)
+{
+ DWORD dwErr=GetLastError();
+}
+
+unsigned long
+_glthread_GetID(void)
+{
+ return GetCurrentThreadId();
+}
+
+
+void
+_glthread_InitTSD(_glthread_TSD *tsd)
+{
+ tsd->key = TlsAlloc();
+ if (tsd->key == TLS_OUT_OF_INDEXES) {
+ perror("Mesa:_glthread_InitTSD");
+ InsteadOf_exit(-1);
+ }
+ tsd->initMagic = INIT_MAGIC;
+}
+
+
+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("Mesa:_glthread_SetTSD");
+ InsteadOf_exit(-1);
+ }
+}
+
+#endif /* WIN32_THREADS */
+
+
+
+/*
+ * XFree86 has its own thread wrapper, Xthreads.h
+ * We wrap it again for GL.
+ */
+#ifdef USE_XTHREADS
+
+unsigned long
+_glthread_GetID(void)
+{
+ return (unsigned long) xthread_self();
+}
+
+
+void
+_glthread_InitTSD(_glthread_TSD *tsd)
+{
+ if (xthread_key_create(&tsd->key, NULL) != 0) {
+ perror(INIT_TSD_ERROR);
+ exit(-1);
+ }
+ tsd->initMagic = INIT_MAGIC;
+}
+
+
+void *
+_glthread_GetTSD(_glthread_TSD *tsd)
+{
+ void *ptr;
+ if (tsd->initMagic != INIT_MAGIC) {
+ _glthread_InitTSD(tsd);
+ }
+ xthread_get_specific(tsd->key, &ptr);
+ return ptr;
+}
+
+
+void
+_glthread_SetTSD(_glthread_TSD *tsd, void *ptr)
+{
+ if (tsd->initMagic != INIT_MAGIC) {
+ _glthread_InitTSD(tsd);
+ }
+ xthread_set_specific(tsd->key, ptr);
+}
+
+#endif /* XTHREAD */
+
+
+
+/*
+ * BeOS threads
+ */
+#ifdef BEOS_THREADS
+
+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
+ */
+
+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 */