mirror of https://gitee.com/bigwinds/arangodb
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// 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.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Jan Steemann
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGODB_BASICS_THREAD_POOL_H
|
|
#define ARANGODB_BASICS_THREAD_POOL_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
#include "Basics/ConditionLocker.h"
|
|
#include "Basics/ConditionVariable.h"
|
|
|
|
#include <deque>
|
|
|
|
namespace arangodb {
|
|
namespace basics {
|
|
|
|
class WorkerThread;
|
|
|
|
class ThreadPool {
|
|
public:
|
|
ThreadPool(ThreadPool const&) = delete;
|
|
ThreadPool& operator=(ThreadPool const&) = delete;
|
|
|
|
ThreadPool(size_t, std::string const&);
|
|
|
|
~ThreadPool();
|
|
|
|
public:
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief return the number of threads in the pool
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
size_t numThreads() const { return _threads.size(); }
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief return the name of the pool
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
char const* name() const { return _name.c_str(); }
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief dequeue a task
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool dequeue(std::function<void()>&);
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
/// @brief enqueue a task
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
template <typename T>
|
|
void enqueue(T task) {
|
|
{
|
|
CONDITION_LOCKER(guard, _condition);
|
|
_tasks.emplace_back(std::function<void()>(task));
|
|
}
|
|
|
|
_condition.signal();
|
|
}
|
|
|
|
private:
|
|
arangodb::basics::ConditionVariable _condition;
|
|
|
|
std::vector<arangodb::basics::WorkerThread*> _threads;
|
|
|
|
std::deque<std::function<void()>> _tasks;
|
|
|
|
std::string _name;
|
|
|
|
std::atomic<bool> _stopping;
|
|
};
|
|
|
|
} // namespace arangodb::basics
|
|
} // namespace arangodb
|
|
|
|
#endif
|