WorkerPool.hh

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/*
 * Copyright (C) 2017 Open Source Robotics Foundation
 *
 * 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 IGNITION_COMMON_WORKER_POOL_HH_
#define IGNITION_COMMON_WORKER_POOL_HH_

#include <functional>
#include <memory>

#include <ignition/common/Export.hh>
#include <ignition/common/Time.hh>
#include <ignition/common/SuppressWarning.hh>

namespace ignition
{
  namespace common
  {
    class WorkerPoolPrivate;

    class IGNITION_COMMON_VISIBLE WorkerPool
    {
      public: explicit WorkerPool(const unsigned int _minThreadCount = 1u);

      public: ~WorkerPool();

      //               return within a finite amount of time.
      public: void AddWork(std::function<void()> _work,
                  std::function<void()> _cb = std::function<void()>());

      //           the WorkerPool is destructed before all work is completed
      public: bool IGN_DEPRECATED(4) WaitForResults(const Time &_timeout);

      //           the WorkerPool is destructed before all work is completed
      public: bool WaitForResults(
        const std::chrono::steady_clock::duration &_timeout =
          std::chrono::steady_clock::duration::zero());

      IGN_COMMON_WARN_IGNORE__DLL_INTERFACE_MISSING
      private: std::unique_ptr<WorkerPoolPrivate> dataPtr;
      IGN_COMMON_WARN_RESUME__DLL_INTERFACE_MISSING
    };
  }
}

#endif