delmon.cpp

symbina上可以使用一个xml解析器,对开发网络应用很有好处

/* Copyright (C) 2004-2005 Darrell Karbott ([e-mail])
** This code is free software; you can redistribute it and/or
** modify it under the terms of GNU Lesser General Public License.
** See http://www.gnu.org/ for further details of the LGPL.
**/

#include "delmon.h"

CNotifyOnDelete::CNotifyOnDelete() : iDeleted( NULL ) {}

void CNotifyOnDelete::MarkDeleted() { 
  if (iDeleted) { 
    *iDeleted = true;
    iDeleted = NULL;
  }
}

CNotifyOnDelete::~CNotifyOnDelete()
{
  if (iDeleted) { 
    *iDeleted = true;
  }
}  

TBool* CNotifyOnDelete::SetObserver(TBool* flagToSet) 
{
  TBool* old = iDeleted;
  iDeleted = flagToSet;
  return old;
}

TDeletionMonitor::TDeletionMonitor(CNotifyOnDelete* pNotifier) : iNotifier( pNotifier), iWasDeleted(false) 
{
  iOldFlag = pNotifier->SetObserver(&iWasDeleted);
}

TDeletionMonitor::~TDeletionMonitor()
{
  if (iOldFlag) {
    // i.e. Propagate the flag value up the stack as the stack unwinds.
    // Cool huh.
    *iOldFlag = iWasDeleted;
  }
  if (!iWasDeleted) {
    // Restore the flag hook for the stack frame above us.
    iNotifier->SetObserver(iOldFlag);
  }
}

TBool TDeletionMonitor::WasDeleted() const { return iWasDeleted; }