c++ - 从哪里获得简单的 Boost 线程管理示例？

Question

所以我有一个简单的 cpp 文件。只有一个具有一个主要功能和 3 个 int a-la 公共(public)变量。喜欢:

   int a;
   int b;
   int c;
   void main()
   {
      startThredA();
      startThredB();
      while(1)
     {
        c = a + b;
        printf(c);
     }
   }

我想创建 2 个线程 A 和 B，其中一个应该为 A 生成随机值，为 b 生成另一个随机值。怎么办？

Answer 1

这是一个小而简单的例子。它已经过尝试并且似乎工作正常。

#include <iostream>
#include <boost/thread.hpp>

namespace this_thread = boost::this_thread;

int a = 0;
int b = 0;
int c = 0;

class BaseThread
{
public:
    BaseThread()
        { }
    virtual ~BaseThread()
        { }

    void operator()()
    {
        try
        {
            for (;;)
            {
                // Check if the thread should be interrupted
                this_thread::interruption_point();

                DoStuff();
            }
        }
        catch (boost::thread_interrupted)
        {
            // Thread end
        }
    }

protected:
    virtual void DoStuff() = 0;
};

class ThreadA : public BaseThread
{
protected:
    virtual void DoStuff()
    {
        a += 1000;
        // Sleep a little while (0.5 second)
        this_thread::sleep(boost::posix_time::milliseconds(500));
    }
};

class ThreadB : public BaseThread
{
protected:
    virtual void DoStuff()
    {
        b++;
        // Sleep a little while (0.5 second)
        this_thread::sleep(boost::posix_time::milliseconds(100));
    }
};

int main()
{
    ThreadA thread_a_instance;
    ThreadB thread_b_instance;

    boost::thread threadA = boost::thread(thread_a_instance);
    boost::thread threadB = boost::thread(thread_b_instance);

    // Do this for 10 seconds (0.25 seconds * 40 = 10 seconds)
    for (int i = 0; i < 40; i++)
    {
        c = a + b;
        std::cout << c << std::endl;

        // Sleep a little while (0.25 second)
        this_thread::sleep(boost::posix_time::milliseconds(250));
    }

    threadB.interrupt();
    threadB.join();

    threadA.interrupt();
    threadA.join();
}