windows系统调用 调度优先级

#include "iostream"
#include "windows.h"
using namespace std;

class CWorkerThread{
public:
    CWorkerThread(LPCTSTR m_szName):m_szName(m_szName),m_hThread(INVALID_HANDLE_VALUE){
        m_hThread=CreateThread(
            NULL,
            0,
            ThreadProc,
            reinterpret_cast<LPVOID>(this),
            0,
            NULL
            );
    }

    virtual ~CWorkerThread(){CloseHandle(m_hThread);}

    virtual void WaitForCompletion(){
        WaitForSingleObject(m_hThread,INFINITE);
    }

    virtual void SetPriority(int nPriority){
        SetThreadPriority(m_hThread,nPriority);    
    }

    virtual void Suspend(){
        SuspendThread(m_hThread);
    }

    virtual void Resume(){
        ResumeThread(m_hThread);
    }

protected:
    static DWORD WINAPI ThreadProc(LPVOID lpParam){
        CWorkerThread *pThis=
            reinterpret_cast<CWorkerThread*>(lpParam);

        pThis->DoStuff();
        return (0);
    }

    virtual void DoStuff(){
        for(int n=0;n<100;n++){
            printf("Thread %s ID:%d,count %d
",m_szName,GetCurrentThreadId(),n);
        }
    }

protected:
    HANDLE m_hThread;
    LPCTSTR m_szName;
};

void main(){
    
    CWorkerThread wtB("B");
    CWorkerThread wtA("A");
    wtA.SetPriority(THREAD_PRIORITY_LOWEST);


    wtA.WaitForCompletion();
    wtB.WaitForCompletion();

    cout<<"Both threads complete."<<endl;

    getchar();
}