62 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 = 0;9 10int main(int argc, const char *argv[]) {11 fprintf(stderr, "Hello world.\n");12 13 dispatch_queue_t queue = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);14 dispatch_semaphore_t sem = dispatch_semaphore_create(0);15 16 const char *path = tempnam(NULL, "libdispatch-fd-");17 18 dispatch_io_t channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path, O_CREAT | O_WRONLY,19 0666, queue, ^(int error) { });20 dispatch_io_set_high_water(channel, 1);21 22 char buf[1000];23 dispatch_data_t data = dispatch_data_create(buf, sizeof(buf), NULL, DISPATCH_DATA_DESTRUCTOR_DEFAULT);24 25 my_global++;26 dispatch_io_write(channel, 0, data, queue, ^(bool done, dispatch_data_t remainingData, int error) {27 my_global++;28 dispatch_async(queue, ^{29 my_global++;30 if (done) {31 dispatch_semaphore_signal(sem);32 }33 });34 });35 36 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);37 my_global++;38 dispatch_io_close(channel, 0);39 channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path, O_RDONLY,40 0, queue, ^(int error) { });41 dispatch_io_set_high_water(channel, 1);42 43 my_global++;44 dispatch_io_read(channel, 0, SIZE_MAX, queue, ^(bool done, dispatch_data_t remainingData, int error) {45 my_global++;46 dispatch_async(queue, ^{47 my_global++;48 if (done) {49 dispatch_semaphore_signal(sem);50 }51 });52 });53 54 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);55 my_global++;56 fprintf(stderr, "Done.\n");57 return 0;58}59 60// CHECK: Hello world.61// CHECK: Done.62