// Copyright (c) 1998-1999 Matra Datavision
// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.

#include <Handle_Standard_Transient.hxx>
#include <Standard_Atomic.hxx>

//============================================================================

void Handle(Standard_Transient)::Dump(Standard_OStream& out) const
{ 
  out << Access();
}

//============================================================================

void Handle(Standard_Transient)::Assign (const Standard_Transient *anItem)
{
  Standard_Transient *anIt = ( anItem ? (Standard_Transient*)anItem : UndefinedHandleAddress );
  if ( anIt == entity ) return;
  EndScope();
  entity = anIt;
  BeginScope();
}

//============================================================================

void Handle(Standard_Transient)::BeginScope()
{
  if (entity != UndefinedHandleAddress)
  {
    Standard_Atomic_Increment (&entity->count);
  }
}

//============================================================================

void Handle(Standard_Transient)::EndScope()
{
  if (entity == UndefinedHandleAddress)
    return;
  if (Standard_Atomic_Decrement (&entity->count) == 0)
    entity->Delete();
  entity = UndefinedHandleAddress;
}