pyshadow_object.cpp

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2025 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
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 *  
 *  *** END LICENSE INFORMATION ***
 */
 
#include "python_common.h"
#include "pyshadow_object.h" 
 
namespace lass
{
namespace python
{
namespace impl
{
 
ShadowBaseCommon::ShadowBaseCommon()
{
}
 
ShadowBaseCommon::~ShadowBaseCommon()
{
}
 
 
TPyObjPtr ShadowBaseCommon::findShadowObject(TShadoweeID shadoweeID, ShadoweeConstness constness)
{
    if (!shadoweeID)
    {
        return TPyObjPtr();
    }
    TCache& c = cache();
    auto i = c.find(TCacheKey(shadoweeID, constness));
    if (i == c.end())
    {
        return TPyObjPtr();
    }
    return fromNakedToSharedPtrCast<PyObject>(i->second);
}
 
 
void ShadowBaseCommon::registerShadowee(TShadoweeID shadoweeID, ShadoweeConstness constness)
{
    if (!shadoweeID)
    {
        return;
    }
    auto r = cache().emplace(TCacheKey(shadoweeID, constness), this);
    LASS_ENFORCE(r.second);
}
 
 
void ShadowBaseCommon::unregisterShadowee(TShadoweeID shadoweeID, ShadoweeConstness constness)
{
    if (!shadoweeID)
    {
        return;
    }
    TCache& c = cache();
    if (c.empty())
    {
        return; // Cache has already been emptied.
    }
    auto i = c.find(TCacheKey(shadoweeID, constness));
    LASS_ENFORCE(i != c.end() && i->second == this);
    c.erase(i);
}
 
 
ShadowBaseCommon::TCache& ShadowBaseCommon::cache()
{
    static TCache cache_;
    return cache_;
}
 
}
 
}
 
}
 
// EOF