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1// RUN: %clang_tsan %s -o %t2// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'3 4#include <dispatch/dispatch.h>5 6#include <stdio.h>7 8long global;9 10int main(int argc, const char *argv[]) {11 fprintf(stderr, "Hello world.\n");12 13 dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);14 dispatch_source_t timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, q);15 long long interval_ms = 10;16 dispatch_source_set_timer(timer, dispatch_time(DISPATCH_TIME_NOW, 0), interval_ms * NSEC_PER_MSEC, 0);17 18 dispatch_semaphore_t sem = dispatch_semaphore_create(0);19 dispatch_source_set_event_handler(timer, ^{20 fprintf(stderr, "timer\n");21 global++;22 23 if (global > 50) {24 dispatch_semaphore_signal(sem);25 dispatch_suspend(timer);26 }27 });28 dispatch_resume(timer);29 30 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);31 32 fprintf(stderr, "Done.\n");33}34 35// CHECK: Hello world.36// CHECK: timer37// CHECK: Done.38// CHECK-NOT: timer39