(iOS) Use the nuclear option for life-cycle management.

This should fix hangs caused by incoming calls or launching siri, but will cause more driver reinits than before

apple/RetroArch/RAGameView.m

@@ -189,17 +189,6 @@ static float g_screen_scale = 1.0f;
    ];
 }
 
-- (void)suspend
-{
-   g_view.context = nil;
-   [EAGLContext setCurrentContext:nil];
-}
-
-- (void)resume
-{
-   g_view.context = g_context;
-   [EAGLContext setCurrentContext:g_context];
-}
 #endif
 
 @end
@@ -215,7 +204,7 @@ bool apple_init_game_view()
       g_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
       [EAGLContext setCurrentContext:g_context];
       g_view.context = g_context;
-
+      
       // Show pause button for a few seconds, so people know it's there
       g_pause_indicator_view.alpha = 1.0f;
       [NSObject cancelPreviousPerformRequestsWithTarget:g_instance];
@@ -232,13 +221,6 @@ bool apple_init_game_view()
 void apple_destroy_game_view()
 {
    dispatch_sync(dispatch_get_main_queue(), ^{
-      // Clear the view, otherwise the last frame from this game will be displayed
-      // briefly on the next game.
-      [g_view bindDrawable];
-      glClearColor(0, 0, 0, 1);
-      glClear(GL_COLOR_BUFFER_BIT);
-      [g_view display];
-   
       glFinish();
       
 #ifdef IOS

apple/RetroArch/RetroArch_Apple.h

@@ -39,9 +39,6 @@ extern id<RetroArch_Platform> apple_platform;
 + (RAGameView*)get;
 - (void)openPauseMenu;
 - (void)closePauseMenu;
-
-- (void)suspend;
-- (void)resume;
 @end
 
 @interface RetroArch_iOS : UINavigationController<UIApplicationDelegate, UINavigationControllerDelegate, RetroArch_Platform>

apple/RetroArch/main.m

@@ -83,6 +83,18 @@ static void event_reload_config(void* userdata)
    init_drivers();
 }
 
+static pthread_mutex_t stasis_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+static void event_stasis(void* userdata)
+{
+   // HACK: uninit_drivers is the nuclear option; uninit_audio would be better but will
+   //       crash when resuming.
+   uninit_drivers();
+   pthread_mutex_lock(&stasis_mutex);
+   pthread_mutex_unlock(&stasis_mutex);
+   init_drivers();
+}
+
 #pragma mark EMULATION
 static pthread_t apple_retro_thread;
 static bool apple_is_paused;
@@ -258,14 +270,19 @@ int main(int argc, char *argv[])
       apple_display_alert(@"No libretro cores were found. You will not be able to play any games.", 0);
 }
 
-- (void)applicationWillEnterForeground:(UIApplication *)application
+- (void)applicationDidBecomeActive:(UIApplication *)application
 {
-   [RAGameView.get resume];
+   if (apple_is_running)
+      pthread_mutex_unlock(&stasis_mutex);
 }
 
-- (void)applicationDidEnterBackground:(UIApplication *)application
+- (void)applicationWillResignActive:(UIApplication *)application
 {
-   [RAGameView.get suspend];
+   if (apple_is_running)
+   {
+      pthread_mutex_lock(&stasis_mutex);
+      apple_frontend_post_event(event_stasis, 0);
+   }
 }
 
 // UINavigationControllerDelegate