GCD Background Thread Helpers

gistfile1.m

void perform_block_after_delay(CGFloat seconds, dispatch_block_t block) {
	dispatch_after(dispatch_time(DISPATCH_TIME_NOW, seconds * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
        block();
	});
}

void perform_block_on_main(dispatch_block_t block) {
	dispatch_async(dispatch_get_main_queue(), ^{
        block();
	});
}

void perform_block_in_bg_after_delay(CGFloat seconds, dispatch_block_t block) {
	dispatch_after(dispatch_time(DISPATCH_TIME_NOW, seconds * NSEC_PER_SEC), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        block();
	});
}

void perform_block_in_bg(dispatch_block_t block) {
	dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0 * NSEC_PER_SEC), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
        block();
	});
}

void perform_block_in_bg_high(dispatch_block_t block) {
	dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0 * NSEC_PER_SEC), dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
        block();
	});
}