File: source-cancel.c

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (37 lines) | stat: -rw-r--r-- 849 bytes parent folder | download | duplicates (40) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
 
// RUN: %clang_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'

#include "dispatch/dispatch.h"

#include <stdio.h>

long global;

int main(int argc, const char *argv[]) {
  dispatch_semaphore_t done = dispatch_semaphore_create(0);

  dispatch_queue_t queue =
      dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);

  dispatch_source_t source =
      dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);

  dispatch_source_set_timer(source, dispatch_walltime(NULL, 0), 1e9, 5);

  global = 42;

  dispatch_source_set_cancel_handler(source, ^{
    fprintf(stderr, "global = %ld\n", global);

    dispatch_semaphore_signal(done);
  });

  dispatch_resume(source);
  dispatch_cancel(source);

  dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);

  return 0;
}

// CHECK: global = 42