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// RUN: %clang_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'
#include <dispatch/dispatch.h>
#include "../test.h"
dispatch_semaphore_t sem;
long global;
long global2;
void callback(void *context) {
global2 = 48;
barrier_wait(&barrier);
dispatch_semaphore_signal(sem);
}
int main() {
fprintf(stderr, "Hello world.\n");
barrier_init(&barrier, 2);
dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
dispatch_group_t g = dispatch_group_create();
sem = dispatch_semaphore_create(0);
dispatch_group_enter(g);
dispatch_async(q, ^{
global = 47;
dispatch_group_leave(g);
barrier_wait(&barrier);
});
dispatch_group_notify(g, q, ^{
global = 48;
barrier_wait(&barrier);
dispatch_semaphore_signal(sem);
});
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
dispatch_group_enter(g);
dispatch_async(q, ^{
global2 = 47;
dispatch_group_leave(g);
barrier_wait(&barrier);
});
dispatch_group_notify_f(g, q, NULL, &callback);
dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER);
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK: Done.
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