41 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 global;9 10int main(int argc, const char *argv[]) {11 dispatch_semaphore_t done = dispatch_semaphore_create(0);12 dispatch_queue_t target_queue = dispatch_queue_create(NULL, DISPATCH_QUEUE_SERIAL);13 dispatch_queue_t q1 = dispatch_queue_create(NULL, DISPATCH_QUEUE_CONCURRENT);14 dispatch_queue_t q2 = dispatch_queue_create(NULL, DISPATCH_QUEUE_CONCURRENT);15 dispatch_set_target_queue(q1, target_queue);16 dispatch_set_target_queue(q2, target_queue);17 18 for (int i = 0; i < 100000; i++) {19 dispatch_async(q1, ^{20 global++;21 22 if (global == 200000) {23 dispatch_semaphore_signal(done);24 }25 });26 dispatch_async(q2, ^{27 global++;28 29 if (global == 200000) {30 dispatch_semaphore_signal(done);31 }32 });33 }34 35 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);36 fprintf(stderr, "Done.\n");37 return 0;38}39 40// CHECK: Done.41