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// RUN: %clangxx_tsan %s -o %t -framework Foundation
// RUN: %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import <assert.h>
#import <memory>
#import <stdatomic.h>
_Atomic(long) shared_call_counter = 0;
_Atomic(long) weak_call_counter = 0;
_Atomic(long) destructor_counter = 0;
_Atomic(long) weak_destroyed_counter = 0;
struct MyStruct {
_Atomic(long) self_counter = 0;
virtual void shared_call() {
atomic_fetch_add_explicit(&self_counter, 1, memory_order_relaxed);
atomic_fetch_add_explicit(&shared_call_counter, 1, memory_order_relaxed);
}
virtual void weak_call() {
atomic_fetch_add_explicit(&weak_call_counter, 1, memory_order_relaxed);
}
virtual ~MyStruct() {
long n = self_counter;
assert(n == 1000);
atomic_fetch_add_explicit(&destructor_counter, 1, memory_order_relaxed);
}
};
int main(int argc, const char *argv[]) {
fprintf(stderr, "Hello world.\n");
dispatch_queue_t q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_group_t g = dispatch_group_create();
for (int i = 0; i < 1000; i++) {
std::shared_ptr<MyStruct> shared(new MyStruct());
std::weak_ptr<MyStruct> weak(shared);
dispatch_group_async(g, q, ^{
for (int j = 0; j < 1000; j++) {
std::shared_ptr<MyStruct> shared_copy(shared);
shared_copy->shared_call();
}
});
dispatch_group_async(g, q, ^{
for (int j = 0; j < 1000; j++) {
std::shared_ptr<MyStruct> weak_copy = weak.lock();
if (weak_copy) {
weak_copy->weak_call();
} else {
atomic_fetch_add_explicit(&weak_destroyed_counter, 1, memory_order_relaxed);
break;
}
}
});
}
dispatch_group_wait(g, DISPATCH_TIME_FOREVER);
fprintf(stderr, "shared_call_counter = %ld\n", shared_call_counter);
fprintf(stderr, "weak_call_counter = %ld\n", weak_call_counter);
fprintf(stderr, "destructor_counter = %ld\n", destructor_counter);
fprintf(stderr, "weak_destroyed_counter = %ld\n", weak_destroyed_counter);
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK: shared_call_counter = 1000000
// CHECK: destructor_counter = 1000
// CHECK: Done.
// CHECK-NOT: WARNING: ThreadSanitizer
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