C++线程类

1.Runnable基类

纯虚的公共执行接口Run，要求派生类实现此方法的定义。

#ifndef _H_RUNNABLE_H_#define _H_RUNNABLE_H_class Runnable{public://虚析构 为了继承的完整析构virtual ~Runnable() {};//纯虚通用执行接口 virtual void Run() = 0;};#endif

2.CThread通用线程类

派生至Runnable类，并提供了对windows原生API的封装实现。

#ifndef _H_CTHREAD_H_#define _H_CTHREAD_H_#include <Windows.h>#include <string>#include <process.h>#include "Runnable.h"class CThread:public Runnable{public:CThread(Runnable* pRunnable = NULL);virtual ~CThread();/**启动线程@arg bSuspend 启动时是否挂起**/bool Start(bool bSuspend = false);/**执行体**/virtual void Run();/**主调线程等待**/void Join(int timeout = -1);/**取消挂起**/void Resume();/**挂起线程PS：由于多线程的异步特性导致线程执行位置的不确定 勿轻易Suspend 否则会有造成死锁的可能或其他诡异的问题**/void Suspend();/**终止线程@arg exitCode 退出代码PS:最好的结束线程的方式是线程执行体自返回 勿轻易Terminate 否则会有造成死锁的可能或其他诡异的问题**/void Terminate(unsigned int exitCode);/**获取线程ID**/unsigned int ThreadID() const;private:/**静态的线程入口 因为C++运行库的线程创建API对线程执行体函数签名有要求故设定此静态函数转接入口执行体**/static unsigned int __stdcall StaticThreadFunc(void* param);private:HANDLE m_handle;//线程句柄unsigned int m_threadID;//线程IDRunnable* m_pRunnale;//线程的任务指针volatile bool m_bRun;//线程是否运行};CThread::CThread( Runnable* pRunnable /*= NULL*/ ):m_pRunnale(pRunnable),m_bRun(false){NULL;}CThread::~CThread(){NULL;}bool CThread::Start( bool bSuspend /*= false*/ ){if (m_bRun){return true;}// 此处用C++运行库的线程创建API而非windows系统的API CreateThread是有一堆理由的 请君自查之。if (bSuspend){m_handle = reinterpret_cast<HANDLE>(_beginthreadex(NULL, 0, StaticThreadFunc, this, CREATE_SUSPENDED, &m_threadID));}else{m_handle = reinterpret_cast<HANDLE>(_beginthreadex(NULL, 0, StaticThreadFunc, this, 0, &m_threadID));}m_bRun = (NULL != m_handle);return m_bRun;}void CThread::Run(){if (NULL == m_handle || !m_bRun){return;}if (NULL != m_pRunnale){m_pRunnale->Run();}m_bRun = false;}void CThread::Join( int timeout /*= -1*/ ){if (NULL == m_handle || !m_bRun){return;}if (timeout < 0){timeout = INFINITE;}::WaitForSingleObject(m_handle, timeout);}void CThread::Resume(){if (NULL == m_handle || !m_bRun){return;}::ResumeThread(m_handle);}void CThread::Suspend(){if (NULL == m_handle || !m_bRun){return;}::SuspendThread(m_handle);}void CThread::Terminate(unsigned int exitCode){if (NULL == m_handle || !m_bRun){return;}::TerminateThread(m_handle, exitCode);}unsigned int CThread::ThreadID() const{return m_threadID;}unsigned int __stdcall CThread::StaticThreadFunc( void* param ){CThread* pt = reinterpret_cast<CThread*>(param);if (pt){pt->Run();}return 0;}#endif

到此为止，一个完整的C++线程类就完成了。下面来一点场景代码测试下，以便展示如何运用之！

3.测试代码

首先，定义一个可执行的任务类。当然，可以在其Run方法中写任何你需要做的逻辑。

#include <iostream>#include "CThread.h"using namespace std;class Printer : public Runnable{public:void Run(){std::cout << "Hello World" << std::endl;}};int main(int argc, char* argv[]){{// 创建打印任务对象Printer nomalPrinter;//创建执行打印任务的线程对象CThread nomalThread(&nomalPrinter);//启动线程nomalThread.Start();//主线程等待线程完毕nomalThread.Join();}system("pause");return 0;}

到此为止，我们就可以利用此线程类，以优雅的方式来设计更加复杂的多线程需求！