Do not build VBOs on a dedicated server.

[xonotic/darkplaces.git] / thread_win.c

diff --git a/thread_win.c b/thread_win.c
index 893e8306048ede60d060f24efbe3e5c9b8669a23..8564ca195dd64fa416f4557efe3a871fe535c59e 100644 (file)
--- a/thread_win.c
+++ b/thread_win.c
@@ -4,6 +4,9 @@
 
 int Thread_Init(void)
 {
+#ifdef THREADDISABLE
+       Con_Printf("Threading disabled in this build\n");
+#endif
        return 0;
 }
 
@@ -13,7 +16,11 @@ void Thread_Shutdown(void)
 
 qboolean Thread_HasThreads(void)
 {
+#ifdef THREADDISABLE
+       return false;
+#else
        return true;
+#endif
 }
 
 void *_Thread_CreateMutex(const char *filename, int fileline)
@@ -243,3 +250,54 @@ int _Thread_WaitThread(void *d, int retval, const char *filename, int fileline)
        free(w);
        return retval;
 }
+
+// standard barrier implementation using conds and mutexes
+// see: http://www.howforge.com/implementing-barrier-in-pthreads
+typedef struct {
+       unsigned int needed;
+       unsigned int called;
+       void *mutex;
+       void *cond;
+} barrier_t;
+
+void *_Thread_CreateBarrier(unsigned int count, const char *filename, int fileline)
+{
+       volatile barrier_t *b = (volatile barrier_t *) Z_Malloc(sizeof(barrier_t));
+#ifdef THREADDEBUG
+       Sys_PrintfToTerminal("%p barrier create(%d) %s:%i\n", b, count, filename, fileline);
+#endif
+       b->needed = count;
+       b->called = 0;
+       b->mutex = Thread_CreateMutex();
+       b->cond = Thread_CreateCond();
+       return (void *) b;
+}
+
+void _Thread_DestroyBarrier(void *barrier, const char *filename, int fileline)
+{
+       volatile barrier_t *b = (volatile barrier_t *) barrier;
+#ifdef THREADDEBUG
+       Sys_PrintfToTerminal("%p barrier destroy %s:%i\n", b, filename, fileline);
+#endif
+       Thread_DestroyMutex(b->mutex);
+       Thread_DestroyCond(b->cond);
+}
+
+void _Thread_WaitBarrier(void *barrier, const char *filename, int fileline)
+{
+       volatile barrier_t *b = (volatile barrier_t *) barrier;
+#ifdef THREADDEBUG
+       Sys_PrintfToTerminal("%p barrier wait %s:%i\n", b, filename, fileline);
+#endif
+       Thread_LockMutex(b->mutex);
+       b->called++;
+       if (b->called == b->needed) {
+               b->called = 0;
+               Thread_CondBroadcast(b->cond);
+       } else {
+               do {
+                       Thread_CondWait(b->cond, b->mutex);
+               } while(b->called);
+       }
+       Thread_UnlockMutex(b->mutex);
+}