topical media & game development
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lib-of-vs-libs-Poco-include-Poco-PriorityExpire.h / h



  //
  // PriorityExpire.h
  //
  // Id: //poco/1.3/Foundation/include/Poco/PriorityExpire.h#2 
  //
  // Library: Foundation
  // Package: Events
  // Module:  PriorityExpire
  //
  // Implementation of the PriorityExpire template.
  //
  // Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef  Foundation_PriorityExpire_INCLUDED
  define  Foundation_PriorityExpire_INCLUDED
  
  include "Poco/Foundation.h"
  include "Poco/Timestamp.h"
  include "Poco/AbstractPriorityDelegate.h"
  
  namespace Poco {
  
  template <class TArgs>
  class PriorityExpire: public AbstractPriorityDelegate<TArgs>
Decorator for AbstractPriorityDelegate adding automatic expiring of registrations to AbstractPriorityDelegate. { public: PriorityExpire(const AbstractPriorityDelegate<TArgs>& p, Timestamp::TimeDiff expireMilliSec): AbstractPriorityDelegate<TArgs>(p), _pDelegate(p.clone()), _expire(expireMilliSec*1000) { } PriorityExpire(const PriorityExpire& expire): AbstractPriorityDelegate<TArgs>(expire), _pDelegate(expire._pDelegate->clone()), _expire(expire._expire), _creationTime(expire._creationTime) { } 

          ~PriorityExpire()
          {
                  destroy();
          }
          
          PriorityExpire& operator = (const PriorityExpire& expire)
          {
                  if (&expire != this)
                  {
                          delete this->_pDelegate;
                          this->_pTarget      = expire._pTarget;
                          this->_pDelegate    = expire._pDelegate->clone();
                          this->_expire       = expire._expire;
                          this->_creationTime = expire._creationTime;
                  }
                  return *this; 
          }
  
          bool notify(const void* sender, TArgs& arguments)
          {
                  if (!expired())
                          return this->_pDelegate->notify(sender, arguments);
                  else
                          return false;
          }
  
          AbstractPriorityDelegate<TArgs>* clone() const
          {
                  return new PriorityExpire(*this);
          }
  
          void destroy()
          {
                  delete this->_pDelegate;
                  this->_pDelegate = 0;
          }
  
          const AbstractPriorityDelegate<TArgs>& getDelegate() const
          {
                  return *this->_pDelegate;
          }
  
  protected:
          bool expired() const
          {
                  return _creationTime.isElapsed(_expire);
          }
  
          AbstractPriorityDelegate<TArgs>* _pDelegate;
          Timestamp::TimeDiff _expire;
          Timestamp _creationTime;
  
  private:
          PriorityExpire();
  };
  
  } // namespace Poco
  
  endif
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 04/09/2009

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