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// -*- C++ -*-
//=============================================================================
/**
* @file LF_Multi_Event.h
*
* $Id$
*
* @author Phil Mesnier <mesnier_p@ociweb.com>
*/
//=============================================================================
#ifndef TAO_LF_MULTI_EVENT_H
#define TAO_LF_MULTI_EVENT_H
#include /**/ "ace/pre.h"
#include "tao/LF_Event.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
// Forward decls
class TAO_Connection_Handler;
class TAO_Transport;
/**
* @class TAO_LF_Multi_Event
*
* @brief Use the Leader/Follower loop to wait for one specific event
* in the invocation path.
*
* Used by the parallel connection strategy for waiting on one of many
* connections.
*/
class TAO_Export TAO_LF_Multi_Event: public TAO_LF_Event
{
public:
/// Constructor
TAO_LF_Multi_Event (void);
/// Destructor
virtual ~TAO_LF_Multi_Event (void);
/// propogate the follower to all the events in the collection.
virtual int bind (TAO_LF_Follower *follower);
/// Unbind the follower from all the collected events.
virtual int unbind (TAO_LF_Follower *follower);
/// Adds a handler to the collection
void add_event (TAO_Connection_Handler *ch);
/// Returns the connection handler that caused the successful status
/// to be returned.
TAO_Connection_Handler *winner(void);
/// Returns the transport associated with the first entry in the collection.
TAO_Transport *base_transport(void);
//@{
/// Return 1 if the condition was satisfied successfully, 0 if it
/// has not - This iterates over the list of attached events and
/// returns 1 if any of them return 1 from successful.
int successful (void) const;
/// Return 1 if an error was detected while waiting for the
/// event - This iterates over the list of events and returns
/// 1 only if all of them return 1 from error_detected.
int error_detected (void) const;
//@}
private:
void operator= (const TAO_LF_Multi_Event &);
TAO_LF_Multi_Event (const TAO_LF_Multi_Event &);
protected:
/// Validate the state change
virtual void state_changed_i (int new_state);
/// Check whether we have reached the final state..
virtual int is_state_final (void);
private:
struct Event_Node {
TAO_Connection_Handler * ptr_;
Event_Node *next_;
};
struct Event_Node *events_;
mutable TAO_Connection_Handler * winner_;
};
TAO_END_VERSIONED_NAMESPACE_DECL
#include /**/ "ace/post.h"
#endif /* TAO_LF_Multi_EVENT_H */
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