1 files changed, 57 insertions, 0 deletions
diff --git a/test/BlocksRuntime/dispatch_async.c b/test/BlocksRuntime/dispatch_async.c
new file mode 100644
index 0000000000000..e3e517c54650e
--- /dev/null
+++ b/test/BlocksRuntime/dispatch_async.c
@@ -0,0 +1,57 @@
+//
+//                     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;
+}