ANDROID: On pause, put all threads in a coma

Since not every engine respects pauseEngine(), or they're in a state
where it simply gets ignored, put all threads in a group coma. Without
this, code still kept looping and wasting cpu cycles, while the user
might want to do use her/his droid for something else.

1 files changed, 25 insertions, 0 deletions

diff --git a/backends/platform/android/android.cpp b/backends/platform/android/android.cpp
index 484f6886ec..d4a2253c30 100644
--- a/backends/platform/android/android.cpp
+++ b/backends/platform/android/android.cpp
@@ -151,6 +151,12 @@ void *OSystem_Android::timerThreadFunc(void *arg) {
 	tv.tv_nsec = 100 * 1000 * 1000;	// 100ms
 
 	while (!system->_timer_thread_exit) {
+		if (JNI::pause) {
+			LOGD("timer thread going to sleep");
+			sem_wait(&JNI::pause_sem);
+			LOGD("timer thread woke up");
+		}
+			
 		timer->handler();
 		nanosleep(&tv, 0);
 	}
@@ -192,6 +198,12 @@ void *OSystem_Android::audioThreadFunc(void *arg) {
 	uint silence_count = 33;
 
 	while (!system->_audio_thread_exit) {
+		if (JNI::pause) {
+			LOGD("audio thread going to sleep");
+			sem_wait(&JNI::pause_sem);
+			LOGD("audio thread woke up");
+		}
+			
 		buf = (byte *)env->GetPrimitiveArrayCritical(bufa, 0);
 		assert(buf);
 
@@ -401,6 +413,19 @@ bool OSystem_Android::pollEvent(Common::Event &event) {
 			_screen_changeid = JNI::surface_changeid;
 			JNI::deinitSurface();
 		}
+
+		if (JNI::pause) {
+			// release some resources
+			// TODO
+			// free textures? they're garbled anyway since no engine
+			// respects EVENT_SCREEN_CHANGED
+			LOGD("deinitialiting surface");
+			JNI::deinitSurface();
+
+			LOGD("main thread going to sleep");
+			sem_wait(&JNI::pause_sem);
+			LOGD("main thread woke up");
+		}
 	}
 
 	lockMutex(_event_queue_lock);