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// RUN: %clang_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s
#include "dispatch/dispatch.h"
#include "../test.h"
long global;
int main() {
fprintf(stderr, "Hello world.\n");
dispatch_semaphore_t done = dispatch_semaphore_create(0);
barrier_init(&barrier, 2);
dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
dispatch_queue_t bgq = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(bgq, ^{
dispatch_sync(q, ^{
global = 42;
});
barrier_wait(&barrier);
});
dispatch_async(bgq, ^{
barrier_wait(&barrier);
dispatch_barrier_sync(q, ^{
global = 43;
});
dispatch_async(bgq, ^{
barrier_wait(&barrier);
global = 44;
});
barrier_wait(&barrier);
dispatch_semaphore_signal(done);
});
dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK: Done.
// CHECK-NOT: WARNING: ThreadSanitizer
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