cdev-1.7.2n

include/cdevRequestObject.i

@@ -0,0 +1,154 @@
+//-----------------------------------------------------------------------------
+// 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:
+//      cdevRequestObject implementation (abstract class)
+//      inline functions	
+//
+// Author:  Jie Chen & Chip Watson
+//
+// Revision History:
+//   cdevRequestObject.i,v
+// Revision 1.3  1998/02/13  14:00:44  chen
+// add ref and deref
+//
+// Revision 1.2  1997/03/03  17:52:28  chen
+// add buffering mechanism to caService
+//
+// Revision 1.1  1995/12/08  15:39:43  chen
+// inline functions
+//
+//
+
+// Note: How to determine to buffer an exeution object?
+//       If an execution object belongs to a group with 
+//       an immediate execution mode, this object will not be
+//       buffered. If an execution object belongs to a group
+//       with a deferred execution mode, this execution object
+//       will be buffered
+
+INLINE
+int
+cdevRequestObject::deferExecution (cdevData* out, cdevData* result)
+{
+  if (executionMode () == CDEV_EXEC_DEFERRED) { 
+    // create a transaction object
+    cdevExecObj* obj = new cdevExecObj (&system_, this, out, result, 0);
+    return 1;
+  }
+  else
+    return 0;
+}
+
+INLINE
+int
+cdevRequestObject::deferExecution (cdevData* out, cdevCallback* callback)
+{
+  if (executionMode () == CDEV_EXEC_DEFERRED) { 
+    // create a transaction object with new copy of callback
+    // must clone the data, as the caller did not
+    cdevCallback *ccbk = new cdevCallback (*callback);
+    cdevData *cloned = new cdevData(*out);
+    cdevExecObj* obj = new cdevExecObj (&system_, this, cloned, 0, ccbk);
+    return 1;
+  }
+  else
+    return 0;
+}
+
+INLINE
+void
+cdevRequestObject::bufferExecution (cdevData* out, cdevData* result,
+				    cdevGroup* group, void* arg)
+{
+  // create an execution object that is registered to the group
+  // caller has already cloned the data, so don't need to
+  cdevExecObj* obj = new cdevExecObj (&system_, this, out, result, 0,
+				      group, arg);
+}
+
+INLINE
+void
+cdevRequestObject::bufferExecution (cdevData* out, cdevCallback* callback,
+				    cdevGroup* group, void* arg)
+{
+  // create an execution object that is registered to the group
+  // caller has already cloned the data, so don't need to
+  cdevExecObj* obj = new cdevExecObj (&system_, this, out, 0, callback,
+				      group, arg);
+}
+
+INLINE
+int
+cdevRequestObject::execNoBlock (cdevData*, cdevData*, void* )
+{
+  // empty: derived class handles this
+  return CDEV_SUCCESS;
+}
+
+INLINE
+int
+cdevRequestObject::execCallback (cdevData*, cdevCallback&, void* )
+{
+  // empty: derived class handles this
+  return CDEV_SUCCESS;
+}
+
+//=======================================================================
+//   clear a long mask, set every bit to 0
+//=======================================================================
+INLINE
+void cdevMaskZero (long& p)
+{
+  ::memset ((char *)&p, (char)0, sizeof (long));
+}
+
+//=======================================================================
+//   turn on a bit at position n inside the mask p
+//=======================================================================
+INLINE
+void cdevMaskSet (long n, long& p)
+{
+  assert ((n >= 0) && (n < sizeof (long) * NUMBITS_PER_BYTE));
+  p |= 1 << n;
+}
+
+//=======================================================================
+//   turn off a bit at position n inside the mask p
+//=======================================================================
+INLINE
+void cdevMaskClr (long n, long& p)
+{
+  assert ((n >= 0) && (n < sizeof (long) * NUMBITS_PER_BYTE));
+  p &= ~(1 << n);
+}
+
+//=======================================================================  
+//   check whether a bit n is set or not
+//=======================================================================
+INLINE
+int cdevMaskIsSet (long n, long p)
+{
+  assert ((n >= 0) && (n < sizeof (long) * NUMBITS_PER_BYTE));
+  return (p & (1 << n));
+}
+
+INLINE
+void cdevRequestObject::ref (void)
+{
+  refCount_ ++;
+}
+
+INLINE
+void cdevRequestObject::deref (void)
+{
+  refCount_ --;
+}
+
+