1 files changed, 83 insertions, 0 deletions
diff --git a/src/jogl/native/macosx/ContextUpdater.m b/src/jogl/native/macosx/ContextUpdater.m
new file mode 100644
index 000000000..587782c98
--- /dev/null
+++ b/src/jogl/native/macosx/ContextUpdater.m
@@ -0,0 +1,83 @@
+#import "ContextUpdater.h"
+#import <pthread.h>
+
+@implementation ContextUpdater
+{
+}
+
+static NSOpenGLContext *theContext;
+static pthread_mutex_t resourceLock = PTHREAD_MUTEX_INITIALIZER;
+
+static void printLockDebugInfo(char *message, char *func, int line)
+{
+	fprintf(stderr, "%s in function: \"%s\" at line: %d\n", message, func, line);
+	fflush(stderr);
+}
+
++ (void) lock
+{
+	if (theContext != NULL)
+	{
+		pthread_mutex_lock(&resourceLock);
+	}
+}
+
++ (void) lockInFunction:(char *)func atLine:(int)line
+{
+	if (theContext != NULL)
+	{
+		printLockDebugInfo("locked  ", func, line);
+		[self lock];
+	}
+}
+
++ (void) unlock
+{
+	if (theContext != NULL)
+	{
+		pthread_mutex_unlock(&resourceLock);
+	}
+}
+
++ (void) unlockInFunction:(char *)func atLine:(int)line
+{
+	if (theContext != NULL)
+	{
+		printLockDebugInfo("unlocked", func, line);
+		[self unlock];
+	}
+}
+
+- (void) registerFor:(NSOpenGLContext *)context with: (NSView *)view
+{
+	if (view != NULL)
+	{
+		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(update:) name:NSViewGlobalFrameDidChangeNotification object: view];
+		theContext = context;
+	}
+}
+
+- (void) update:(NSNotification *)notification
+{
+	[ContextUpdater lock];
+	
+	[theContext update];
+	
+	[ContextUpdater unlock];
+}
+
+- (id) init
+{	
+	theContext = NULL;
+	
+	return [super init];
+}
+
+- (void) dealloc
+{
+	[[NSNotificationCenter defaultCenter] removeObserver:self];
+	
+	[super dealloc];
+}
+
+@end
+\ No newline at end of file