diff options
Diffstat (limited to 'src/mesa/glapi/glapi.c')
| -rw-r--r-- | src/mesa/glapi/glapi.c | 42 |
1 files changed, 28 insertions, 14 deletions
diff --git a/src/mesa/glapi/glapi.c b/src/mesa/glapi/glapi.c index 2b105d0f17d..e36fccb354c 100644 --- a/src/mesa/glapi/glapi.c +++ b/src/mesa/glapi/glapi.c @@ -198,6 +198,16 @@ PUBLIC const void *_glapi_Context = NULL; #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 */ @@ -231,23 +241,27 @@ void _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 } |