Android: fix black screen at boot on some devices

core/hw/pvr/Renderer_if.cpp

@@ -269,7 +269,12 @@ bool rend_single_frame()
 	do
 	{
 #if !defined(TARGET_NO_THREADS)
+#if defined(_ANDROID)
+		if (!rs.Wait(100))
+			return false;
+#else
 		rs.Wait();
+#endif
 #endif
 		if (!renderer_enabled)
 			return false;

core/linux/common.cpp

@@ -169,9 +169,21 @@ void cResetEvent::Reset()//reset
 	state=false;
 	pthread_mutex_unlock( &mutx );
 }
-void cResetEvent::Wait(u32 msec)//Wait for signal , then reset
+bool cResetEvent::Wait(u32 msec)//Wait for signal , then reset
 {
-	verify(false);
+	bool rc = true;
+	pthread_mutex_lock( &mutx );
+	if (!state)
+	{
+		struct timespec ts;
+		ts.tv_sec = msec / 1000;
+		ts.tv_nsec = (msec % 1000) * 1000;
+		rc = pthread_cond_timedwait( &cond, &mutx, &ts ) == 0;
+	}
+	state=false;
+	pthread_mutex_unlock( &mutx );
+
+	return rc;
 }
 void cResetEvent::Wait()//Wait for signal , then reset
 {

core/stdclass.h

@@ -201,7 +201,7 @@ public :
 	~cResetEvent();
 	void Set();		//Set state to signaled
 	void Reset();	//Set state to non signaled
-	void Wait(u32 msec);//Wait for signal , then reset[if auto]
+	bool Wait(u32 msec);//Wait for signal , then reset[if auto]. Returns false if timed out
 	void Wait();	//Wait for signal , then reset[if auto]
 };
 

core/windows/winmain.cpp

@@ -785,12 +785,12 @@ void cResetEvent::Reset()//reset
 	#endif
 	ResetEvent(hEvent);
 }
-void cResetEvent::Wait(u32 msec)//Wait for signal , then reset
+bool cResetEvent::Wait(u32 msec)//Wait for signal , then reset
 {
 	#if defined(DEBUG_THREADS)
 		Sleep(rand() % 10);
 	#endif
-	WaitForSingleObject(hEvent,msec);
+	return WaitForSingleObject(hEvent,msec) == WAIT_OBJECT_0;
 }
 void cResetEvent::Wait()//Wait for signal , then reset
 {

shell/android-studio/reicast/src/main/jni/src/Android.cpp

@@ -521,7 +521,7 @@ JNIEXPORT jint JNICALL Java_com_reicast_emulator_emu_JNIdc_data(JNIEnv *env, job
 
 JNIEXPORT void JNICALL Java_com_reicast_emulator_emu_JNIdc_rendframe(JNIEnv *env,jobject obj)
 {
-    while(!rend_single_frame()) ;
+    rend_single_frame();
 }
 
 JNIEXPORT void JNICALL Java_com_reicast_emulator_emu_JNIdc_kcode(JNIEnv * env, jobject obj, jintArray k_code, jintArray l_t, jintArray r_t, jintArray jx, jintArray jy)