定義虛擬作業

關於這項作業

<env>OSFactory 類別宣告內,您必須定義一組虛擬作業,以建立應用程式所需的作業系統服務。這些服務包括作業、同步化、連接埠、訊息佇列及計時服務。

VxOS.h 檔案中,虛擬作業的宣告如下:

public:
   virtual OMOSMessageQueue *createOMOSMessageQueue(
      OMBoolean /* shouldGrow */ = TRUE,
      const long messageQueueSize =
      OMOSThread::DefaultMessageQueueSize)
   { return (OMOSMessageQueue*)new
         VxOSMessageQueue(messageQueueSize);}
   virtual OMOSConnectionPort *createOMOSConnectionPort()
   {
   #ifdef _OMINSTRUMENT
      return (OMOSConnectionPort*)new VxConnectionPort();
   #else
      return NULL;
   #endif
   }
   virtual OMOSEventFlag* createOMOSEventFlag() {
      return (OMOSEventFlag *)new VxOSEventFlag(); }
   virtual OMOSThread *createOMOSThread(void tfunc(
      void*), void *param,
      const char* const threadName = NULL,
      const long stackSize=OMOSThread::DefaultStackSize)
      {return (OMOSThread*)new VxThread(tfunc, param,
         threadName, stackSize);};
   virtual OMOSThread* createOMOSWrapperThread(
      void* osHandle) {
         if (NULL == osHandle)
            osHandle = getCurrentThreadHandle();
         return (OMOSThread*)new VxThread(osHandle);
   }
   virtual OMOSMutex *createOMOSMutex() {return
      (OMOSMutex*)new VxMutex();}
   virtual OMOSTimer *createOMOSTickTimer(timeUnit tim,
      void cbkfunc(void*), void *param) {
         return (OMOSTimer*)new VxTimer(tim, cbkfunc,
            param);   // TickTimer for real time
   }
   virtual OMOSTimer *createOMOSIdleTimer(
      void cbkfunc(void*), void *param) {
         return (OMOSTimer*)new VxTimer(cbkfunc, param);
   / Idle timer for simulated time
   }
   virtual OMOSSemaphore* createOMOSSemaphore(
      unsigned long semFlags = 0,
      unsigned long initialCount = 1,
      unsigned long /* maxCount */ = 1,
      const char * const /* name */ = NULL)
   {
      return (OMOSSemaphore*) new VxSemaphore(
         semFlags, initialCount);
   }
   
   virtual void* getCurrentThreadHandle();
   virtual void delayCurrentThread(timeUnit ms);
   virtual OMBoolean waitOnThread(void* osHandle,
      timeUnit ms) {return FALSE;
   }
};

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