Program Listing for File ResourceEvent.h

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// Copyright 2016 Proyectos y Sistemas de Mantenimiento SL (eProsima).
//
// 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 _FASTDDS_RTPS_RESOURCES_RESOURCEEVENT_H_
#define _FASTDDS_RTPS_RESOURCES_RESOURCEEVENT_H_

#ifndef DOXYGEN_SHOULD_SKIP_THIS_PUBLIC

#include <fastrtps/utils/TimedMutex.hpp>
#include <fastrtps/utils/TimedConditionVariable.hpp>

#include <thread>
#include <atomic>
#include <vector>

namespace eprosima {
namespace fastrtps {
namespace rtps {

class TimedEventImpl;

class ResourceEvent
{
public:

    ResourceEvent() = default;

    ~ResourceEvent();

    void init_thread();

    void stop_thread();

    void register_timer(
            TimedEventImpl* event);

    void unregister_timer(
            TimedEventImpl* event);

    void notify(
            TimedEventImpl* event);

    void notify(
            TimedEventImpl* event,
            const std::chrono::steady_clock::time_point& timeout);

private:

    std::atomic<bool> stop_{ false };

    TimedMutex mutex_;

    TimedConditionVariable cv_manipulation_;

    bool allow_vector_manipulation_ = true;

    TimedConditionVariable cv_;

    size_t timers_count_ = 0;

    std::vector<TimedEventImpl*> pending_timers_;

    std::vector<TimedEventImpl*> active_timers_;

    std::atomic<bool> skip_checking_active_timers_;

    std::chrono::steady_clock::time_point current_time_;

    std::thread thread_;

    bool register_timer_nts(
            TimedEventImpl* event);

    void event_service();

    void sort_timers();

    void update_current_time();

    void do_timer_actions();

    void resize_collections()
    {
        pending_timers_.reserve(timers_count_);
        active_timers_.reserve(timers_count_);
    }

};

} /* namespace rtps */
} /* namespace fastrtps */
} /* namespace eprosima */

#endif //DOXYGEN_SHOULD_SKIP_THIS_PUBLIC

#endif //_FASTDDS_RTPS_RESOURCES_RESOURCEEVENT_H_