cdev-1.7.2n

include/cdevTimerHandler.h

@@ -0,0 +1,53 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 1994,1995 Southeastern Universities Research Association,
+//                         Continuous Electron Beam Accelerator Facility
+//
+// This software was developed under a United States Government license
+// described in the NOTICE file included as part of this distribution.
+//
+//-----------------------------------------------------------------------------
+//
+// Description:
+//      cdevTimerHandler Class
+//
+//      This class is a base class for handling timer based event.
+//      Derived classes implement the real function.
+//
+// Author:  Jie Chen
+//
+// Revision History:
+//   cdevTimerHandler.h,v
+// Revision 1.1  1998/02/10  18:04:57  chen
+// add cdevSystem timer handler
+//
+//
+//
+#ifndef _CDEV_TIMER_HANDLER_H
+#define _CDEV_TIMER_HANDLER_H
+
+#include <cdevTimeValue.h>
+
+class cdevTimerHandler
+{
+public:
+  // constructor
+  cdevTimerHandler          (void) {}
+  // destructor
+  virtual ~cdevTimerHandler (void) {}
+
+  virtual int timerCallback (double /* time */,
+			     const void* /* arg */ = 0) {return 0;}
+  // PURPOSE: this function is called when timer is expired
+  // REQUIRE: none
+  // PROMISE: if return -1: all timers associated with this handler
+  //          will be removed. return 0: everything is ok.
+
+  virtual const char* className (void) const {return "cdevTimerHandler";}
+
+private:
+  // deny access to copy and assignment operator
+  cdevTimerHandler (const cdevTimerHandler& handler);
+  cdevTimerHandler& operator = (const cdevTimerHandler& handler);
+
+};
+#endif