A while ago I was fiddling with various APIs to do rate limited calls. This is
the simplest one. Morph it as you please. Maybe it'll be useful to someone.
@interface GCDCoalescent : NSObject
- (void)dispatchOn:(dispatch_queue_t)queue after:(double)seconds
block:(dispatch_block_t)block;
@end
@implementation GCDCoalescent
{
uint64_t count;
}
- (void)dispatchOn:(dispatch_queue_t)queue after:(double)seconds
block:(dispatch_block_t)block;
{
uint64_t eventNumber = __sync_add_and_fetch(&count, 1);
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, seconds *
NSEC_PER_SEC), queue, ^{
if (count > eventNumber) return;
block();
});
}
@end
--
Seth Willits
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