thread_pool.h
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/*
* Copyright 2002-2014 the original author or authors.
*
* 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
*
* CC/LICENSE
*
* 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 _THREAD_POOL_H_
#define _THREAD_POOL_H_
#include "common.h"
#include "worker_thread.h"
/*
ThreadPool class manages all the ThreadPool related activities. This includes keeping track of idle threads and ynchronizations between all threads.
*/
class ThreadPool {
public:
ThreadPool();
virtual ~ThreadPool();
static ThreadPool* get_instance();
void destroy_pool(int32_t max_poll_second);
bool assign_work(WorkerThread* worker);
bool fetch_work(WorkerThread** worker);
void initialize_threads(uint32_t max_thread_num);
uint32_t get_max_thread_num();
bool is_too_many() const;
void thread_end();
static void* thread_execute(void* param);
private:
uint32_t _max_thread_num;
uint32_t _cur_thread_num;
pthread_cond_t _cond_crit;
private:
static pthread_mutex_t _mutex_sync;
queue<WorkerThread*> _worker_queue;
static pthread_mutex_t _mutex_work_completion;
uint32_t _unfinished_work;
sem_t _available_work;
sem_t _available_threads;
uint32_t _queue_size;
};
#endif