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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// ... assertion fails line 34
// <atomic>
// template <class T>
// bool
// atomic_compare_exchange_strong(volatile atomic<T>* obj, T* expc, T desr);
//
// template <class T>
// bool
// atomic_compare_exchange_strong(atomic<T>* obj, T* expc, T desr);
#include <atomic>
#include <type_traits>
#include <cassert>
#include "atomic_helpers.h"
template <class T>
struct TestFn {
void operator()() const {
{
typedef std::atomic<T> A;
A a;
T t(T(1));
std::atomic_init(&a, t);
assert(std::atomic_compare_exchange_strong(&a, &t, T(2)) == true);
assert(a == T(2));
assert(t == T(1));
assert(std::atomic_compare_exchange_strong(&a, &t, T(3)) == false);
assert(a == T(2));
assert(t == T(2));
}
{
typedef std::atomic<T> A;
volatile A a;
T t(T(1));
std::atomic_init(&a, t);
assert(std::atomic_compare_exchange_strong(&a, &t, T(2)) == true);
assert(a == T(2));
assert(t == T(1));
assert(std::atomic_compare_exchange_strong(&a, &t, T(3)) == false);
assert(a == T(2));
assert(t == T(2));
}
}
};
int main()
{
TestEachAtomicType<TestFn>()();
}
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