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// $Id$
#ifndef ACE_RMCAST_COPY_ON_WRITE_CPP
#define ACE_RMCAST_COPY_ON_WRITE_CPP
#include "RMCast_Copy_On_Write.h"
#if ! defined (__ACE_INLINE__)
#include "RMCast_Copy_On_Write.i"
#endif /* __ACE_INLINE__ */
ACE_RCSID(RMCast, RMCast_Copy_On_Write, "$Id$")
template<class COLLECTION, class ITERATOR> void
ACE_RMCast_Copy_On_Write_Collection<COLLECTION,ITERATOR>::_incr_refcnt (void)
{
// LOCKING: no locking is required, the caller grabs the mutex.
this->refcount_++;
}
template<class COLLECTION, class ITERATOR> void
ACE_RMCast_Copy_On_Write_Collection<COLLECTION,ITERATOR>::_decr_refcnt (void)
{
// LOCKING: no locking is required, the caller grabs the mutex.
{
this->refcount_--;
if (this->refcount_ != 0)
return;
}
//@@ TODO: If this wrapper is going to be completely general some
// kind of functor has to be provided to remove the elements in the
// collection, in case the are no self-managed
delete this;
}
// ****************************************************************
template<class KEY, class ITEM, class COLLECTION, class ITERATOR>
ACE_RMCast_Copy_On_Write<KEY,ITEM,COLLECTION,ITERATOR>::
ACE_RMCast_Copy_On_Write (void)
: ACE_RMCast_Copy_On_Write_Container<COLLECTION,ITERATOR> ()
{
}
template<class KEY, class ITEM, class COLLECTION, class ITERATOR>
ACE_RMCast_Copy_On_Write<KEY,ITEM,COLLECTION,ITERATOR>::
~ACE_RMCast_Copy_On_Write (void)
{
ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, this->mutex_);
while (this->pending_writes_ != 0)
this->cond_.wait ();
this->collection_->_decr_refcnt ();
this->collection_ = 0;
}
template<class KEY, class ITEM, class COLLECTION, class ITERATOR> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,COLLECTION,ITERATOR>::
for_each (ACE_RMCast_Worker<KEY,ITEM> *worker)
{
Read_Guard ace_mon (*this);
ITERATOR end = ace_mon.collection->collection.end ();
for (ITERATOR i = ace_mon.collection->collection.begin (); i != end; ++i)
{
int r = worker->work ((*i).key (), (*i).item ());
if (r == 1)
return 0; // Abort loop, but no error
if (r == -1)
return -1;
}
return 0;
}
template<class KEY, class ITEM, class C, class ITERATOR> KEY
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,ITERATOR>::first_key (void)
{
Read_Guard ace_mon (*this);
ITERATOR end = ace_mon.collection->collection.end ();
ITERATOR begin = ace_mon.collection->collection.begin ();
if (begin == end)
{
return KEY ();
}
return (*begin).key ();
}
template<class KEY, class ITEM, class C, class ITERATOR> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,ITERATOR>::empty (void)
{
Read_Guard ace_mon (*this);
ITERATOR end = ace_mon.collection->collection.end ();
ITERATOR begin = ace_mon.collection->collection.begin ();
return end == begin;
}
template<class KEY, class ITEM, class C, class I> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,I>::bind (KEY const & k,
ITEM const & i)
{
Write_Guard ace_mon (*this);
return this->bind_i (ace_mon, k, i);
}
template<class KEY, class ITEM, class C, class I> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,I>::unbind (KEY const & k)
{
Write_Guard ace_mon (*this);
return this->unbind_i (ace_mon, k);
}
template<class KEY, class ITEM, class C, class I> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,I>::bind_i (Write_Guard &ace_mon,
KEY const & k,
ITEM const & i)
{
return ace_mon.copy->collection.bind (k, i);
}
template<class KEY, class ITEM, class C, class I> int
ACE_RMCast_Copy_On_Write<KEY,ITEM,C,I>::unbind_i (Write_Guard &ace_mon,
KEY const & k)
{
return ace_mon.copy->collection.unbind (k);
}
// ****************************************************************
template<class COLLECTION, class ITERATOR>
ACE_RMCast_Copy_On_Write_Container<COLLECTION,ITERATOR>::ACE_RMCast_Copy_On_Write_Container (void)
: pending_writes_ (0)
, writing_ (0)
, cond_ (mutex_)
{
ACE_NEW (this->collection_, Collection);
}
// ****************************************************************
template<class COLLECTION, class ITERATOR>
ACE_RMCast_Copy_On_Write_Write_Guard<COLLECTION,ITERATOR>::
ACE_RMCast_Copy_On_Write_Write_Guard (Container &container)
: copy (0)
, mutex (container.mutex_)
, cond (container.cond_)
, pending_writes (container.pending_writes_)
, writing_flag (container.writing_)
, collection (container.collection_)
{
{
ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, this->mutex);
this->pending_writes++;
while (this->writing_flag != 0)
this->cond.wait ();
this->writing_flag = 1;
}
// Copy outside the mutex, because it may take a long time.
// Nobody can change it, because it is protected by the
// writing_flag.
// First initialize it (with the correct reference count
ACE_NEW (this->copy, Collection);
// Copy the contents
this->copy->collection = this->collection->collection;
}
template<class COLLECTION, class ITERATOR>
ACE_RMCast_Copy_On_Write_Write_Guard<COLLECTION,ITERATOR>::
~ACE_RMCast_Copy_On_Write_Write_Guard (void)
{
Collection *tmp = 0;
{
ACE_GUARD (ACE_SYNCH_MUTEX, ace_mon, this->mutex);
tmp = this->collection;
this->collection = this->copy;
this->writing_flag = 0;
this->pending_writes--;
this->cond.signal ();
}
// Delete outside the mutex, because it may take a long time.
// @@ Is this right? What happens if several readers are still
// using the old copy?
tmp->_decr_refcnt ();
}
// ****************************************************************
#endif /* ACE_RMCAST_COPY_ON_WRITE_CPP */
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