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#import "ContextUpdater.h"
#import <pthread.h>
@implementation ContextUpdater
{
}
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(NULL);
}
+ (void) lock
{
if (ctx != NULL)
{
pthread_mutex_lock(&resourceLock);
}
}
+ (void) lockInFunction:(char *)func atLine:(int)line
{
if (ctx != NULL)
{
printLockDebugInfo("locked ", func, line);
[self lock];
}
}
+ (void) unlock
{
if (ctx != NULL)
{
pthread_mutex_unlock(&resourceLock);
}
}
+ (void) unlockInFunction:(char *)func atLine:(int)line
{
if (ctx != NULL)
{
printLockDebugInfo("unlocked", func, line);
[self unlock];
}
}
- (void) update:(NSNotification *)notification
{
[ContextUpdater lock];
NSRect r = [view frame];
if(viewRect.origin.x != r.origin.x ||
viewRect.origin.y != r.origin.y ||
viewRect.size.width != r.size.width ||
viewRect.size.height != r.size.height) {
viewUpdated = TRUE;
viewRect = r;
}
[ContextUpdater unlock];
}
- (BOOL) needsUpdate
{
BOOL r;
[ContextUpdater lock];
r = viewUpdated;
viewUpdated = FALSE;
[ContextUpdater unlock];
return r;
}
- (id) initWithContext:(NSOpenGLContext *)context view: (NSView *)nsView
{
ctx = context;
view = nsView;
[ctx retain];
[view retain];
viewRect = [view frame];
viewUpdated = FALSE;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(update:) name:NSViewGlobalFrameDidChangeNotification object: view];
return [super init];
}
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
[view release];
[ctx release];
[super dealloc];
}
@end
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