compiler-rt/test/tsan/libdispatch/source-cancel2.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 dispatch_semaphore_t done;
  10
  11 void handler(void *arg) {
  12   fprintf(stderr, "global = %ld\n", global);
  13
  14   dispatch_semaphore_signal(done);
  15 }
  16
  17 int main(int argc, const char *argv[]) {
  18   done = dispatch_semaphore_create(0);
  19
  20   dispatch_queue_t queue =
  21       dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
  22
  23   dispatch_source_t source =
  24       dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
  25
  26   dispatch_source_set_timer(source, dispatch_walltime(NULL, 0), 1e9, 5);
  27
  28   global = 42;
  29
  30   dispatch_source_set_cancel_handler_f(source, &handler);
  31
  32   dispatch_resume(source);
  33   dispatch_cancel(source);
  34
  35   dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
  36
  37   return 0;
  38 }
  39
  40 // CHECK: global = 42