windows系統調用 調度優先順序

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 1 #include "iostream" 2 #include "windows.h" 3 using namespace std; 4  5 class CWorkerThread{ 6 public: 7     CWorkerThread(LPCTSTR m_szName):m_szName(m_szName),m_hThread(INVALID_HANDLE_VALUE){ 8         m_hThread=CreateThread( 9             NULL,10             0,11             ThreadProc,12             reinterpret_cast<LPVOID>(this),13             0,14             NULL15             );16     }17 18     virtual ~CWorkerThread(){CloseHandle(m_hThread);}19 20     virtual void WaitForCompletion(){21         WaitForSingleObject(m_hThread,INFINITE);22     }23 24     virtual void SetPriority(int nPriority){25         SetThreadPriority(m_hThread,nPriority);    26     }27 28     virtual void Suspend(){29         SuspendThread(m_hThread);30     }31 32     virtual void Resume(){33         ResumeThread(m_hThread);34     }35 36 protected:37     static DWORD WINAPI ThreadProc(LPVOID lpParam){38         CWorkerThread *pThis=39             reinterpret_cast<CWorkerThread*>(lpParam);40 41         pThis->DoStuff();42         return (0);43     }44 45     virtual void DoStuff(){46         for(int n=0;n<100;n++){47             printf("Thread %s ID:%d,count %d\n",m_szName,GetCurrentThreadId(),n);48         }49     }50 51 protected:52     HANDLE m_hThread;53     LPCTSTR m_szName;54 };55 56 void main(){57     58     CWorkerThread wtB("B");59     CWorkerThread wtA("A");60     wtA.SetPriority(THREAD_PRIORITY_LOWEST);61 62 63     wtA.WaitForCompletion();64     wtB.WaitForCompletion();65 66     cout<<"Both threads complete."<<endl;67 68     getchar();69 }