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
38
39
40
41
|
// 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 my_global;
long my_global2;
dispatch_semaphore_t done;
void callback(void *context) {
my_global2 = 42;
dispatch_semaphore_signal(done);
}
int main(int argc, const char *argv[]) {
fprintf(stderr, "start\n");
done = dispatch_semaphore_create(0);
dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
my_global = 10;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10 * NSEC_PER_MSEC)), q, ^{
my_global = 42;
dispatch_semaphore_signal(done);
});
my_global2 = 10;
dispatch_after_f(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(10 * NSEC_PER_MSEC)), q, NULL, &callback);
dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
fprintf(stderr, "done\n");
return 0;
}
// CHECK: start
// CHECK: done
|
