#if defined(THREADS)
+#ifdef WIN32_THREADS
+/* _glthread_DECLARE_STATIC_MUTEX is broken on windows. There will be race! */
+#define CHECK_MULTITHREAD_LOCK()
+#define CHECK_MULTITHREAD_UNLOCK()
+#else
+_glthread_DECLARE_STATIC_MUTEX(ThreadCheckMutex);
+#define CHECK_MULTITHREAD_LOCK() _glthread_LOCK_MUTEX(ThreadCheckMutex)
+#define CHECK_MULTITHREAD_UNLOCK() _glthread_UNLOCK_MUTEX(ThreadCheckMutex)
+#endif
+
static GLboolean ThreadSafe = GL_FALSE; /**< In thread-safe mode? */
_glthread_TSD _gl_DispatchTSD; /**< Per-thread dispatch pointer */
static _glthread_TSD ContextTSD; /**< Per-thread context pointer */
_glapi_check_multithread(void)
{
#if defined(THREADS) && !defined(GLX_USE_TLS)
- if (!ThreadSafe) {
- static unsigned long knownID;
- static GLboolean firstCall = GL_TRUE;
- if (firstCall) {
- knownID = _glthread_GetID();
- firstCall = GL_FALSE;
- }
- else if (knownID != _glthread_GetID()) {
- ThreadSafe = GL_TRUE;
- _glapi_set_dispatch(NULL);
- _glapi_set_context(NULL);
- }
+ static unsigned long knownID;
+ static GLboolean firstCall = GL_TRUE;
+
+ if (ThreadSafe)
+ return;
+
+ CHECK_MULTITHREAD_LOCK();
+ if (firstCall) {
+ /* initialize TSDs */
+ (void) _glthread_GetTSD(&ContextTSD);
+ (void) _glthread_GetTSD(&_gl_DispatchTSD);
+
+ knownID = _glthread_GetID();
+ firstCall = GL_FALSE;
}
- else if (!_glapi_get_dispatch()) {
- /* make sure that this thread's dispatch pointer isn't null */
+ else if (knownID != _glthread_GetID()) {
+ ThreadSafe = GL_TRUE;
_glapi_set_dispatch(NULL);
+ _glapi_set_context(NULL);
}
+ CHECK_MULTITHREAD_UNLOCK();
#endif
}