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// -*- C++ -*-
//=============================================================================
/**
* @file GUIResource_Factory.h
*
* @author Balachandran Natarajan <bala@cs.wustl.edu>
* @author Marek Brudka <mbrudka@aster.pl>
*/
//=============================================================================
#ifndef TAO_GUI_RESOURCE_FACTORY_H
#define TAO_GUI_RESOURCE_FACTORY_H
#include /**/ "ace/pre.h"
#include /**/ "tao/TAO_Export.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/orbconf.h"
#include "ace/Thread_Mutex.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
class ACE_Reactor_Impl;
class ACE_Reactor;
ACE_END_VERSIONED_NAMESPACE_DECL
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
/** Abstract base class for the GUI resource factory.
*
* This base class for resource factories which provide
* GUIReactors integrated with specific GUI
* event loop. In general, children of this class reimplement
* reactor_impl method where specific
* GUIReactor is created. GUIResource_Factory are usually
* created by GUIResource_Loader subclasses.
* Children of this class will be held in TSS by the ORB Core.
*/
class TAO_Export GUIResource_Factory
{
public:
GUIResource_Factory ();
virtual ~GUIResource_Factory ();
/** Create ACE_Reactor using allocate_reactor_impl.
* Please note that this call is NOT synchronized. Left to the
* higher level versions to synchronize access.
*/
virtual ACE_Reactor *get_reactor (void) ;
/**
* Reclaim the reactor if allocated by this factory.
* Please note that this call is NOT synchronized. Left to the
* higher level versions to synchronize access.
*/
virtual void reclaim_reactor (ACE_Reactor *);
protected:
/**
* Create or return current reactor instance.
* Please note that this call is NOT synchronized. Left to the
* get_reactor() to synchronize access.
*/
virtual ACE_Reactor_Impl *reactor_impl (void) = 0;
private:
/**
* Flag that is set to true if the reactor obtained from the
* get_reactor() method is dynamically allocated. If this flag is
* set to true, then the reclaim_reactor() method with call the delete
* operator on the given reactor. This flag is necessary to make
* sure that a reactor not allocated by the default resource factory
* is not reclaimed by the default resource factory. Such a
* situation can occur when a resource factory derived from the
* default one overrides the get_reactor() method but does not
* override the reclaim_reactor() method.
*/
bool dynamically_allocated_reactor_;
/// for internal locking.
TAO_SYNCH_MUTEX lock_;
};
}
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_GUI_RESOURCE_FACTORY_H */
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