compiler-rt/test/tsan/libdispatch/source-cancel.c

   1 // RUN: %clang_tsan %s -o %t
   2 // RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
   3
   4 #include "dispatch/dispatch.h"
   5
   6 #include <stdio.h>
   7
   8 long global;
   9
  10 int main(int argc, const char *argv[]) {
  11   dispatch_semaphore_t done = dispatch_semaphore_create(0);
  12
  13   dispatch_queue_t queue =
  14       dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
  15
  16   dispatch_source_t source =
  17       dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
  18
  19   dispatch_source_set_timer(source, dispatch_walltime(NULL, 0), 1e9, 5);
  20
  21   global = 42;
  22
  23   dispatch_source_set_cancel_handler(source, ^{
  24     fprintf(stderr, "global = %ld\n", global);
  25
  26     dispatch_semaphore_signal(done);
  27   });
  28
  29   dispatch_resume(source);
  30   dispatch_cancel(source);
  31
  32   dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
  33
  34   return 0;
  35 }
  36
  37 // CHECK: global = 42