latch.hpp

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/*
 *  Copyright (c) 2014 Samsung Electronics Co., Ltd All Rights Reserved
 *
 *  Contact: Piotr Bartosiewicz <p.bartosiewi@partner.samsung.com>
 *
 *  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
 */

#ifndef COMMON_UTILS_LATCH_HPP
#define COMMON_UTILS_LATCH_HPP

#include <mutex>
#include <condition_variable>


namespace utils {


class Latch {
public:
    Latch();

    void set();

    void wait();

    bool wait(const unsigned int timeoutMs);

    void waitForN(const unsigned int n);

    bool waitForN(const unsigned int n, const unsigned int timeoutMs);

    bool empty();
private:
    std::mutex mMutex;
    std::condition_variable mCondition;
    unsigned int mCount;
};


} // namespace utils


#endif // COMMON_UTILS_LATCH_HPP