trunk/test/atomics/atomics.flag/test_and_set.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.
//
//===----------------------------------------------------------------------===//

// <atomic>

// struct atomic_flag

// bool test_and_set(memory_order = memory_order_seq_cst);
// bool test_and_set(memory_order = memory_order_seq_cst) volatile;

#include <atomic>
#include <cassert>

int main()
{
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set() == 0);
        assert(f.test_and_set() == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_relaxed) == 0);
        assert(f.test_and_set(std::memory_order_relaxed) == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_consume) == 0);
        assert(f.test_and_set(std::memory_order_consume) == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_acquire) == 0);
        assert(f.test_and_set(std::memory_order_acquire) == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_release) == 0);
        assert(f.test_and_set(std::memory_order_release) == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_acq_rel) == 0);
        assert(f.test_and_set(std::memory_order_acq_rel) == 1);
    }
    {
        std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_seq_cst) == 0);
        assert(f.test_and_set(std::memory_order_seq_cst) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set() == 0);
        assert(f.test_and_set() == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_relaxed) == 0);
        assert(f.test_and_set(std::memory_order_relaxed) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_consume) == 0);
        assert(f.test_and_set(std::memory_order_consume) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_acquire) == 0);
        assert(f.test_and_set(std::memory_order_acquire) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_release) == 0);
        assert(f.test_and_set(std::memory_order_release) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_acq_rel) == 0);
        assert(f.test_and_set(std::memory_order_acq_rel) == 1);
    }
    {
        volatile std::atomic_flag f;
        f.clear();
        assert(f.test_and_set(std::memory_order_seq_cst) == 0);
        assert(f.test_and_set(std::memory_order_seq_cst) == 1);
    }
}