// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "ConditionVariable.hpp"

#include "Yarn_test.hpp"

TEST(WithoutBoundScheduler, ConditionVariable)
{
    bool trigger[3] = {false, false, false};
    bool signal[3] = {false, false, false};
    std::mutex mutex;
    yarn::ConditionVariable cv;

    std::thread thread([&]
    {
        for (int i = 0; i < 3; i++)
        {
            std::unique_lock<std::mutex> lock(mutex);
            cv.wait(lock, [&] { return trigger[i]; });
            signal[i] = true;
            cv.notify_one();
        }
    });

    ASSERT_FALSE(signal[0]);
    ASSERT_FALSE(signal[1]);
    ASSERT_FALSE(signal[2]);

    for (int i = 0; i < 3; i++)
    {
        {
            std::unique_lock<std::mutex> lock(mutex);
            trigger[i] = true;
            cv.notify_one();
            cv.wait(lock, [&] { return signal[i]; });
        }

        ASSERT_EQ(signal[0], 0 <= i);
        ASSERT_EQ(signal[1], 1 <= i);
        ASSERT_EQ(signal[2], 2 <= i);
    }

    thread.join();
}


TEST_P(WithBoundScheduler, ConditionVariable)
{
    bool trigger[3] = {false, false, false};
    bool signal[3] = {false, false, false};
    std::mutex mutex;
    yarn::ConditionVariable cv;

    std::thread thread([&]
    {
        for (int i = 0; i < 3; i++)
        {
            std::unique_lock<std::mutex> lock(mutex);
            cv.wait(lock, [&] { return trigger[i]; });
            signal[i] = true;
            cv.notify_one();
        }
    });

    ASSERT_FALSE(signal[0]);
    ASSERT_FALSE(signal[1]);
    ASSERT_FALSE(signal[2]);

    for (int i = 0; i < 3; i++)
    {
        {
            std::unique_lock<std::mutex> lock(mutex);
            trigger[i] = true;
            cv.notify_one();
            cv.wait(lock, [&] { return signal[i]; });
        }

        ASSERT_EQ(signal[0], 0 <= i);
        ASSERT_EQ(signal[1], 1 <= i);
        ASSERT_EQ(signal[2], 2 <= i);
    }

    thread.join();
}