boost綜合使用

該例子的功能是：

1、創建測試線程

2、創建工作線程

3、使用list隊列

4、線程通知

5、線程鎖

工作線程如果沒有活要做，則掛起，如果消息隊列裏有新的消息了，則通知工作線程開始幹活。說多了都是廢話，上代碼：

// ConsoleApplication3.cpp : 定義控制檯應用程序的入口點。
//

#include "stdafx.h"

#include "boost/thread.hpp"
#include "boost/thread/condition_variable.hpp"
#include "boost/thread/mutex.hpp"
#include "boost/shared_ptr.hpp"
#include "boost/function.hpp"
#include "boost/bind.hpp"

#include <list>
#include <iostream>


boost::shared_ptr<std::list<int>> _g_list;
boost::mutex _g_mutex_lock_list;

boost::condition_variable _g_cv;
boost::mutex _g_cv_mutex;


/*
 *	\brief
 *		t:
 *		f: no quit
 */
bool _g_is_quit = false;



void Add(int value)
{
	{
		boost::mutex::scoped_lock lock(_g_mutex_lock_list);

		if (_g_list){
			_g_list->push_front(value);
		}
	}

	_g_cv.notify_one();
}

void CreateThr(int threadCnt)
{
	if (!threadCnt)
	{
		// no thread
		return;
	}

	// thread function
	boost::function<void(void)> func = []()
	{
		int cnt = 10;
		while (--cnt)
		{
			Add(cnt);
		}
	};

	for (size_t i = 0; i < (size_t)threadCnt; ++i)
	{
		boost::thread th(boost::bind(func));
		//boost::thread th(func);
	}
}

int GetValueFromList()
{
	boost::mutex::scoped_lock lock(_g_mutex_lock_list);
	
	if (!_g_list->size()){
		return 0;
	}

	int v = _g_list->back();
	_g_list->pop_back();
	return v;
}

// first launch work thread
void WorkThread()
{
#define WORKTHREADCNT 1
	auto func = []()
	{
		int value = 0;
		int cnt = 0;
		boost::mutex::scoped_lock lock(_g_cv_mutex);

		while (!_g_is_quit)
		{
			value = GetValueFromList();
			if (!value){
				_g_cv.wait(lock);
				continue;
			}

			printf("%3d,", value);
			++cnt;
			if (cnt != 0 && cnt % 9 == 0){
				printf("\n");
			}
		}
	};

	for (size_t i = 0; i < WORKTHREADCNT; i++)
	{
		boost::thread th(func);
	}
}

int _tmain(int argc, _TCHAR* argv[])
{
	_g_list = boost::shared_ptr<std::list<int>>(new std::list<int>());

	WorkThread();
	CreateThr(4);

	int value = 0;
	while (value != -1)
	{
		if (value == -1){
			_g_is_quit = true;
			_g_cv.notify_all();
			break;
		}

		using namespace std;
		cout << "enter a number, enter [-1] to quit.\n";
		cin >> value;
		Add(value);
	}

	system("pause");
	return 0;
}