valerieosmith
valerieosmith
/ DispatchQueueSurprise.m
Created
February 6, 2018 15:54
— forked from steipete/DispatchQueueSurprise.m
This fails in iOS 9, but passes for iOS 10/11. What changed around serial/concurrent dispatch queues in iOS 10 so that this now works. Or rather, why does this not work in iOS 9?
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| - (void)testDispatchConcurrentExecutionWithNamedQueuesRaw { | |
| let expectation = [self expectationWithDescription:@"Concurrent execution must happen"]; | |
| let semaphore = dispatch_semaphore_create(0); | |
| // global queue, concurrent | |
| let attributes = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_CONCURRENT, QOS_CLASS_DEFAULT, 0); | |
| let defaultQueue = dispatch_queue_create("com.pspdfkit.default-concurrent", attributes); | |
| // serial sub-queues that dispatch to concurrent queue | |
| let queue1 = dispatch_queue_create("com.pspdfkit.queue1", DISPATCH_QUEUE_SERIAL); |