test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_fetch_and_explicit.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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

// <atomic>

// template <class Integral>
//     Integral
//     atomic_fetch_and_explicit(volatile atomic<Integral>* obj, Integral op);
// 
// template <class Integral>
//     Integral
//     atomic_fetch_and_explicit(atomic<Integral>* obj, Integral op);

#include <atomic>
#include <type_traits>
#include <cassert>

template <class T>
void
test()
{
    {
        typedef std::atomic<T> A;
        A t;
        std::atomic_init(&t, T(1));
        assert(std::atomic_fetch_and_explicit(&t, T(2),
               std::memory_order_seq_cst) == T(1));
        assert(t == T(0));
    }
    {
        typedef std::atomic<T> A;
        volatile A t;
        std::atomic_init(&t, T(3));
        assert(std::atomic_fetch_and_explicit(&t, T(2),
               std::memory_order_seq_cst) == T(3));
        assert(t == T(2));
    }
}

int main()
{
    test<char>();
    test<signed char>();
    test<unsigned char>();
    test<short>();
    test<unsigned short>();
    test<int>();
    test<unsigned int>();
    test<long>();
    test<unsigned long>();
    test<long long>();
    test<unsigned long long>();
    test<wchar_t>();
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
    test<char16_t>();
    test<char32_t>();
#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
}