1//
2// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
3// See https://llvm.org/LICENSE.txt for license information.
4// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
5
6#include <CoreFoundation/CoreFoundation.h>
7
8#include <dispatch/dispatch.h>
9#include <unistd.h>
10//#import <Foundation/Foundation.h>
11#include <Block.h>
12
13// CONFIG rdar://problem/6371811
14
15const char *whoami = "nobody";
16
17void EnqueueStuff(dispatch_queue_t q)
18{
19 __block CFIndex counter;
20
21 // above call has a side effect: it works around:
22 // <rdar://problem/6225809> __block variables not implicitly imported into intermediate scopes
23 dispatch_async(q, ^{
24 counter = 0;
25 });
26
27
28 dispatch_async(q, ^{
29 //printf("outer block.\n");
30 counter++;
31 dispatch_async(q, ^{
32 //printf("inner block.\n");
33 counter--;
34 if(counter == 0) {
35 printf("%s: success\n", whoami);
36 exit(0);
37 }
38 });
39 if(counter == 0) {
40 printf("already done? inconceivable!\n");
41 exit(1);
42 }
43 });
44}
45
46int main (int argc, const char * argv[]) {
47 dispatch_queue_t q = dispatch_queue_create("queue", NULL);
48
49 whoami = argv[0];
50
51 EnqueueStuff(q);
52
53 dispatch_main();
54 printf("shouldn't get here\n");
55 return 1;
56}
57

source code of compiler-rt/test/BlocksRuntime/dispatch_async.c