dwindows: gtk4/dw.c comparison

GTK4: Port dw_mutex_lock() fix from Mac since the GTK4 thread safety is basically the same as the Mac method now.

comparison

equal deleted inserted replaced

-:ef078d219bfc
+:b9b10bb1f689
 * Parameters:
 *       mutex: The handle to the mutex returned by dw_mutex_new().
 */
 void API dw_mutex_lock(HMTX mutex)
 {
-pthread_mutex_lock(mutex);
+/* We need to handle locks from the main thread differently...
+* since we can't stop message processing... otherwise we
+* will deadlock... so try to acquire the lock and continue
+* processing messages in between tries.
+*/
+if(_dw_thread == pthread_self())
+{
+while(pthread_mutex_trylock(mutex) != 0)
+{
+/* Process any pending events */
+if(g_main_context_pending(NULL))
+{
+do
+{
+g_main_context_iteration(NULL, FALSE);
+}
+while(g_main_context_pending(NULL));
+}
+else
+sched_yield();
+}
+}
+else
+{
+pthread_mutex_lock(mutex);
+}
 }
 /*
 * Tries to gain access to the semaphore.
 * Parameters:

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