forked from OSchip/llvm-project
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
|
//
|
||
|
|
// The LLVM Compiler Infrastructure
|
||
|
|
//
|
||
|
|
// This file is distributed under the University of Illinois Open Source
|
||
|
|
// License. See LICENSE.TXT for details.
|
||
|
|
|
||
|
|
#include <CoreFoundation/CoreFoundation.h>
|
||
|
|
|
||
|
|
#include <dispatch/dispatch.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
//#import <Foundation/Foundation.h>
|
||
|
|
#include <Block.h>
|
||
|
|
|
||
|
|
// CONFIG rdar://problem/6371811
|
||
|
|
|
||
|
|
const char *whoami = "nobody";
|
||
|
|
|
||
|
|
void EnqueueStuff(dispatch_queue_t q)
|
||
|
|
{
|
||
|
|
__block CFIndex counter;
|
||
|
|
|
||
|
|
// above call has a side effect: it works around:
|
||
|
|
// <rdar://problem/6225809> __block variables not implicitly imported into intermediate scopes
|
||
|
|
dispatch_async(q, ^{
|
||
|
|
counter = 0;
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
dispatch_async(q, ^{
|
||
|
|
//printf("outer block.\n");
|
||
|
|
counter++;
|
||
|
|
dispatch_async(q, ^{
|
||
|
|
//printf("inner block.\n");
|
||
|
|
counter--;
|
||
|
|
if(counter == 0) {
|
||
|
|
printf("%s: success\n", whoami);
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
if(counter == 0) {
|
||
|
|
printf("already done? inconceivable!\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
int main (int argc, const char * argv[]) {
|
||
|
|
dispatch_queue_t q = dispatch_queue_create("queue", NULL);
|
||
|
|
|
||
|
|
whoami = argv[0];
|
||
|
|
|
||
|
|
EnqueueStuff(q);
|
||
|
|
|
||
|
|
dispatch_main();
|
||
|
|
printf("shouldn't get here\n");
|
||
|
|
return 1;
|
||
|
|
}
|