/usr/include/Poco/Expire.h is in libpoco-dev 1.3.6p1-5.1build1.
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// Expire.h
//
// $Id: //poco/1.3/Foundation/include/Poco/Expire.h#2 $
//
// Library: Foundation
// Package: Events
// Module: Expire
//
// Implementation of the Expire 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_Expire_INCLUDED
#define Foundation_Expire_INCLUDED
#include "Poco/Foundation.h"
#include "Poco/AbstractDelegate.h"
#include "Poco/Timestamp.h"
namespace Poco {
template <class TArgs>
class Expire: public AbstractDelegate<TArgs>
/// Decorator for AbstractDelegate adding automatic
/// expiring of registrations to AbstractDelegates.
{
public:
Expire(const AbstractDelegate<TArgs>& p, Timestamp::TimeDiff expireMillisecs):
AbstractDelegate<TArgs>(p),
_pDelegate(p.clone()),
_expire(expireMillisecs*1000)
{
}
Expire(const Expire& expire):
AbstractDelegate<TArgs>(expire),
_pDelegate(expire._pDelegate->clone()),
_expire(expire._expire),
_creationTime(expire._creationTime)
{
}
~Expire()
{
destroy();
}
Expire& operator = (const Expire& expire)
{
if (&expire != this)
{
delete this->_pDelegate;
this->_pDelegate = expire._pDelegate->clone();
this->_expire = expire._expire;
this->_creationTime = expire._creationTime;
this->_pTarget = expire._pTarget;
}
return *this;
}
bool notify(const void* sender, TArgs& arguments)
{
if (!expired())
return this->_pDelegate->notify(sender, arguments);
else
return false;
}
AbstractDelegate<TArgs>* clone() const
{
return new Expire(*this);
}
void destroy()
{
delete this->_pDelegate;
this->_pDelegate = 0;
}
const AbstractDelegate<TArgs>& getDelegate() const
{
return *this->_pDelegate;
}
protected:
bool expired() const
{
return _creationTime.isElapsed(_expire);
}
AbstractDelegate<TArgs>* _pDelegate;
Timestamp::TimeDiff _expire;
Timestamp _creationTime;
private:
Expire();
};
} // namespace Poco
#endif
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