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// -*- C++ -*-
// $Id$
#include "tao/LF_Event.h"
#include "tao/LF_Follower.h"
#include "tao/Leader_Follower.h"
#if !defined (__ACE_INLINE__)
# include "tao/LF_Event.inl"
#endif /* __ACE_INLINE__ */
ACE_RCSID(tao, LF_Event, "$Id$")
TAO_LF_Event::TAO_LF_Event (void)
: state_ (TAO_LF_Event::LFS_IDLE)
, follower_ (0)
{
}
TAO_LF_Event::~TAO_LF_Event (void)
{
}
void
TAO_LF_Event::state_changed (int new_state)
{
if (this->follower_ == 0)
{
this->state_changed_i (new_state);
}
else
{
TAO_Leader_Follower &leader_follower =
this->follower_->leader_follower ();
ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, leader_follower.lock ());
if (is_state_final ()== 0 &&
this->follower_ != 0)
{
this->state_changed_i (new_state);
this->follower_->signal ();
}
}
}
void
TAO_LF_Event::state_changed_i (int new_state)
{
if (this->state_ == new_state)
return;
// Validate the state change
if (this->state_ == TAO_LF_Event::LFS_IDLE)
{
// From the LFS_IDLE state we can only become active.
if (new_state == TAO_LF_Event::LFS_ACTIVE
|| new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED)
this->state_ = new_state;
return;
}
else if (this->state_ == TAO_LF_Event::LFS_ACTIVE)
{
// From LFS_ACTIVE we can only move to a few states
if (new_state != TAO_LF_Event::LFS_IDLE)
{
if (new_state == TAO_LF_Event::LFS_CONNECTION_CLOSED)
{
this->state_ = TAO_LF_Event::LFS_FAILURE;
}
else
{
this->state_ = new_state;
}
}
return;
}
else if (this->state_ == TAO_LF_Event::LFS_SUCCESS
|| this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED)
{
// From the two states above we can go back to ACTIVE, as when a
// request is restarted.
if (new_state == TAO_LF_Event::LFS_ACTIVE)
{
this->state_ = new_state;
}
return;
}
else /* if (this->state_ == TAO_LF_Event::LFS_TIMEOUT || FAILURE ) */
{
// Other states are final...
}
}
int
TAO_LF_Event::successful (void) const
{
return this->state_ == TAO_LF_Event::LFS_SUCCESS;
}
int
TAO_LF_Event::error_detected (void) const
{
return (this->state_ == TAO_LF_Event::LFS_FAILURE
|| this->state_ == TAO_LF_Event::LFS_TIMEOUT
|| this->state_ == TAO_LF_Event::LFS_CONNECTION_CLOSED);
}
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