标签:std thread list C++ ThreadPool _. 线程 NewTask 简单
// thread_pool.h
#pragma once
#include <vector>
#include <deque>
#include <thread>
#include <functional>
#include <condition_variable>
class ThreadPool {
using Task = std::function<void()>;
using TaskList = std::deque<Task>;
using WorkThreadQueue = std::vector<std::thread*>;
public:
ThreadPool();
~ThreadPool();
public:
bool Start(uint16_t ThreadNum = 1);
void Stop();
void AddTask(const Task&);
private:
void ThreadLoop();
Task AcceptTask();
private:
uint16_t thread_num_;
bool is_started_;
WorkThreadQueue work_thread_list_;
TaskList task_list_;
std::mutex thread_pool_mutex_;
std::condition_variable condition_variable_;
};
// thread_pool.cpp
#include "thread_pool.h"
ThreadPool::ThreadPool() : thread_num_(1), is_started_(false) {}
ThreadPool::~ThreadPool() {
if (true == is_started_) {
Stop();
}
}
bool ThreadPool::Start(uint16_t ThreadNum) {
thread_num_ = ThreadNum;
if (false == work_thread_list_.empty()) {
return false;
}
is_started_ = true;
//预先创建线程
work_thread_list_.reserve(thread_num_);
for (uint16_t i = 0; i < thread_num_; ++i) {
work_thread_list_.push_back(new std::thread(std::bind(&ThreadPool::ThreadLoop, this)));
}
return true;
}
void ThreadPool::Stop() {
std::lock_guard<std::mutex> Lock(thread_pool_mutex_);
is_started_ = false;
condition_variable_.notify_all();
for (WorkThreadQueue::iterator it = work_thread_list_.begin(); it != work_thread_list_.end(); ++it) {
(*it)->join();
delete *it;
}
work_thread_list_.clear();
}
void ThreadPool::ThreadLoop() {
while (true == is_started_) {
Task NewTask = AcceptTask();
if (NewTask) {
NewTask();
}
}
}
void ThreadPool::AddTask(const Task& NewTask) {
std::lock_guard<std::mutex> Lock(thread_pool_mutex_);
task_list_.push_back(NewTask);
condition_variable_.notify_one();
}
ThreadPool::Task ThreadPool::AcceptTask() {
std::unique_lock<std::mutex> Lock(thread_pool_mutex_);
// always use a while-loop, due to spurious wakeup
while (task_list_.empty() && is_started_) {
condition_variable_.wait(Lock);
}
Task NewTask;
TaskList::size_type size = task_list_.size();
if (!task_list_.empty() && is_started_) {
NewTask = task_list_.front();
task_list_.pop_front();
}
return NewTask;
}
标签:std,thread,list,C++,ThreadPool,_.,线程,NewTask,简单 来源: https://www.cnblogs.com/umichan0621/p/16533311.html
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