42 lines · c
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 my_global;9long my_global2;10dispatch_semaphore_t done;11 12void callback(void *context) {13 my_global2 = 42;14 15 dispatch_semaphore_signal(done);16}17 18int main(int argc, const char *argv[]) {19 fprintf(stderr, "start\n");20 done = dispatch_semaphore_create(0);21 22 dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);23 24 my_global = 10;25 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10 * NSEC_PER_MSEC)), q, ^{26 my_global = 42;27 28 dispatch_semaphore_signal(done);29 });30 31 my_global2 = 10;32 dispatch_after_f(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10 * NSEC_PER_MSEC)), q, NULL, &callback);33 34 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);35 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);36 fprintf(stderr, "done\n");37 return 0;38}39 40// CHECK: start41// CHECK: done42