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
42
43
44
45
46
| // 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 = 0;
int main(int argc, const char *argv[]) {
fprintf(stderr, "Hello world.\n");
dispatch_queue_t q1 = dispatch_queue_create("queue1", NULL);
dispatch_queue_t q2 = dispatch_queue_create("queue2", NULL);
dispatch_group_t g = dispatch_group_create();
dispatch_sync(q1, ^{
dispatch_suspend(q1);
dispatch_async(q2, ^{
my_global++;
dispatch_resume(q1);
});
});
dispatch_sync(q1, ^{
my_global++;
});
dispatch_sync(q1, ^{
dispatch_suspend(q1);
dispatch_group_enter(g);
dispatch_async(q1,^{ my_global++; });
dispatch_async(q1,^{ my_global++; });
dispatch_async(q1,^{ my_global++; dispatch_group_leave(g); });
my_global++;
dispatch_resume(q1);
});
dispatch_group_wait(g, DISPATCH_TIME_FOREVER);
fprintf(stderr, "Done.\n");
return 0;
}
// CHECK: Hello world.
// CHECK: Done.
|