From a1fb90635fa80182447a8c2a1d6a21345a20c45d Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Wed, 16 Oct 2013 00:52:52 -0700
Subject: [PATCH] Functions for explicitly pausing and unpausing

---
 src/gba/gba-thread.c | 37 ++++++++++++++++++++++++++++++++++++-
 src/gba/gba-thread.h |  3 +++
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/gba/gba-thread.c b/src/gba/gba-thread.c
index 8bb1e642a..47a6fc575 100644
--- a/src/gba/gba-thread.c
+++ b/src/gba/gba-thread.c
@@ -167,11 +167,47 @@ void GBAThreadJoin(struct GBAThread* threadContext) {
 	pthread_cond_destroy(&threadContext->sync.audioRequiredCond);
 }
 
+void GBAThreadPause(struct GBAThread* threadContext) {
+	int frameOn = 1;
+	pthread_mutex_lock(&threadContext->stateMutex);
+	if (threadContext->state == THREAD_RUNNING) {
+		if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
+			threadContext->debugger->state = DEBUGGER_EXITING;
+		}
+		threadContext->state = THREAD_PAUSED;
+		frameOn = 0;
+	}
+	pthread_mutex_unlock(&threadContext->stateMutex);
+	pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
+	if (frameOn != threadContext->sync.videoFrameOn) {
+		threadContext->sync.videoFrameOn = frameOn;
+		pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
+	}
+	pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
+}
+
+void GBAThreadUnpause(struct GBAThread* threadContext) {
+	int frameOn = 1;
+	pthread_mutex_lock(&threadContext->stateMutex);
+	if (threadContext->state == THREAD_PAUSED) {
+		threadContext->state = THREAD_RUNNING;
+		pthread_cond_broadcast(&threadContext->stateCond);
+	}
+	pthread_mutex_unlock(&threadContext->stateMutex);
+	pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
+	if (frameOn != threadContext->sync.videoFrameOn) {
+		threadContext->sync.videoFrameOn = frameOn;
+		pthread_cond_broadcast(&threadContext->sync.videoFrameAvailableCond);
+	}
+	pthread_mutex_unlock(&threadContext->sync.videoFrameMutex);
+}
+
 void GBAThreadTogglePause(struct GBAThread* threadContext) {
 	int frameOn = 1;
 	pthread_mutex_lock(&threadContext->stateMutex);
 	if (threadContext->state == THREAD_PAUSED) {
 		threadContext->state = THREAD_RUNNING;
+		pthread_cond_broadcast(&threadContext->stateCond);
 	} else if (threadContext->state == THREAD_RUNNING) {
 		if (threadContext->debugger && threadContext->debugger->state == DEBUGGER_RUNNING) {
 			threadContext->debugger->state = DEBUGGER_EXITING;
@@ -179,7 +215,6 @@ void GBAThreadTogglePause(struct GBAThread* threadContext) {
 		threadContext->state = THREAD_PAUSED;
 		frameOn = 0;
 	}
-	pthread_cond_broadcast(&threadContext->stateCond);
 	pthread_mutex_unlock(&threadContext->stateMutex);
 	pthread_mutex_lock(&threadContext->sync.videoFrameMutex);
 	if (frameOn != threadContext->sync.videoFrameOn) {
diff --git a/src/gba/gba-thread.h b/src/gba/gba-thread.h
index 8974050ca..97c683ce4 100644
--- a/src/gba/gba-thread.h
+++ b/src/gba/gba-thread.h
@@ -54,6 +54,9 @@ struct GBAThread {
 
 int GBAThreadStart(struct GBAThread* threadContext);
 void GBAThreadJoin(struct GBAThread* threadContext);
+
+void GBAThreadPause(struct GBAThread* threadContext);
+void GBAThreadUnpause(struct GBAThread* threadContext);
 void GBAThreadTogglePause(struct GBAThread* threadContext);
 struct GBAThread* GBAThreadGetContext(void);