boost_tutorial

Microsoft Visual Studio 2010 編譯通過

/* 
 * boost::thread tutorial 
 * 
 * 
 *
 */  

#include <stdlib.h>
#include "boost/asio.hpp"
#include <iostream>  
#include <string>  

using namespace std;  

#include <boost/thread.hpp>  

//#1  
void run()  
{  
    cout << "Method #1" <<endl;  
}  

//#2  
boost::mutex mutex;  
class Count {  
    int _id;  
public:  
    Count(int id):_id(id) {}  
    void operator ()() {  
        for(int i = 0; i < 10; i++) {  
            boost::mutex::scoped_lock lock(mutex);  
            cout << "Count id:" << _id << " " << i <<endl;  
        }  
    }  
};  

//#3  
class InnerThread {  
public:  
    static void run() {  
        cout << "class inner thread: run and start must be static." <<endl;  
    }  

    static void start() {  
        boost::thread thread(&run);  
        thread.join();  
    }  
};  

class InnerThread2 {  
public:  
    void run() {  
        cout << "class inner thread: use boost::bind" <<endl;  
    }  

    void start() {  
        boost::function0<void> f = boost::bind(&InnerThread2::run, this);  
        boost::thread thread(f);  
        thread.join();  
    }  
};  

//#4  
class SingletonThread {  
public:  
    void run() {  
        cout << "Singleton thread" <<endl;  
    }  

    void start() {  
        boost::function0<void> f = boost::bind(&SingletonThread::run, SingletonThread::getInstance());  
        boost::thread thread(f);  
        thread.join();  
    }  

    static SingletonThread* getInstance() {  
        if(!_instance) {  
            _instance = new SingletonThread;  
        }  
        return _instance;  
    }  
private:  
    SingletonThread() {}  
    static SingletonThread* _instance;  
};  
SingletonThread* SingletonThread::_instance = 0;  

//#5  
class Class {  
public:  
    void run(const std::string& str) {  
        cout <<str <<endl;  
    }  

    int add(int x, int y) {  
        cout << "x+y=" <<x+y<<endl;  
        return x+y;  
    }  
};  

//#6  
int add(int x, int y) {  
    return x+y;  
}  

int main()  
{  
    cout << "boost::thread: " << endl;  

    //#1: Simple method  
    boost::thread th1(&run);  
    cout << "main thread " <<endl;  
    th1.join();  

    //#2: Through class operator() method  
    boost::thread th21(Count(1));  
    boost::thread th22(Count(2));  
    th21.join();  
    th22.join();  

    //#3: Class inner thread : static method  
    InnerThread ith;  
    ith.start();  
    InnerThread::start();  

    InnerThread2 ith2;  
    ith2.start();  

    //#4: Singleton thread  
    SingletonThread *st = SingletonThread::getInstance();  
    st->start();  

    //#5: Outer class thread  
    Class cls;  
    boost::thread outer_thread(boost::bind(&Class::run, &cls, "Outer thread"));  
    outer_thread.join();  

    //#6: Complex method: with return value  
    boost::function2<int, int, int> f = &add;  
    boost::packaged_task<int> pt(boost::bind<int>(f, 1, 2));  
    boost::unique_future<int> fi = pt.get_future();  
    boost::thread th2(boost::move(pt));  
    fi.wait();  
    th2.join();  
    cout <<"x+y="<<fi.get()<<endl;  

    boost::packaged_task<int> pt_cls(boost::bind<int>(&Class::add, &cls, 1, 2));  
    boost::unique_future<int> fi_cls = pt_cls.get_future();  
    boost::thread th2_cls(boost::move(pt_cls));  
    fi_cls.wait();  
    th2_cls.join();  
    cout <<"x+y="<<fi_cls.get()<<endl;  

    /* 
     *related functions 
     *  boost::thread 
     *  boost::function 
     *  boost::bind 
     */  

    //some usages:  
    int x = 1, y =2;  
    cout << "x+y=" <<boost::bind<int>(f, _1, _2)(x,y)<<endl;  

    system("pause");
    return 0;  
}