Question

如何在C++类中安全地使用多线程中的处理函数

Answer 1

#define WIN32_LEAN_AND_MEAN
#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>
#include <process.h>

typedef unsigned (WINAPI *PBEGINTHREADEX_THREADFUNC)
(LPVOID lpThreadParameter);

typedef unsigned *PBEGINTHREADEX_THREADID;

class ThreadObject
{
public:
ThreadObject();
void StartThread();
void WaitForExit();

static DWORD WINAPI ThreadFunc(LPVOID param);

protected:
virtual DWORD ThreadMemberFunc();

HANDLE m_hThread;
DWORD m_ThreadId;
};

ThreadObject::ThreadObject()
{
m_hThread = NULL;
m_ThreadId = 0;
}

void ThreadObject::StartThread()
{
m_hThread = (HANDLE)_beginthreadex(NULL,0,(PBEGINTHREADEX_THREADFUNC)ThreadObject::ThreadFunc,
(LPVOID)this, 0, (PBEGINTHREADEX_THREADID)&m_ThreadId);
if(m_hThread != NULL)
{
printf("Thread launched\n");
}
}

void ThreadObject::WaitForExit()
{
WaitForSingleObject(m_hThread, INFINITE);
CloseHandle(m_hThread);
}

DWORD WINAPI ThreadObject::ThreadFunc(LPVOID param)
{
ThreadObject* pto = (ThreadObject*)param;

return pto->ThreadMemberFunc();
}

DWORD ThreadObject::ThreadMemberFunc()
{
//std::cout<<"Do Something usefull......."<<endl;
printf("Do Something usefull.......");
return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{
//cout<<"hello world!"<<endl;

ThreadObject obj;
obj.StartThread();
obj.WaitForExit();

getchar();
return 0;
}