/usr/include/crystalspace-2.0/csutil/weakreferenced.h is in libcrystalspace-dev 2.0+dfsg-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | /*
Crystal Space Weak Reference Counting Implementation
Copyright (C) 2006 by Jorrit Tyberghein
(C) 2006 by Amir Taaki
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_CSUTIL_WEAKREFERENCED_H__
#define __CS_CSUTIL_WEAKREFERENCED_H__
/**\file
* Weak Reference Counting Implementation
*/
#include "array.h"
namespace CS
{
namespace Utility
{
/**
* This is a class which provides basic weak reference-counting semantics.
* It can be used in conjunction with the smart pointer template class
* csWeakRef (see <weakref.h>). This class itself provides no functionality
* beyond pointer ownership tracking. It is intended to be used to add
* weak referencing support to other classes by inheriting from it.
*/
class WeakReferenced
{
public:
WeakReferenced () : weakref_owners (0) {}
~WeakReferenced ()
{
if (weakref_owners)
{
for (size_t i = 0; i < weakref_owners->GetSize(); i++)
{
*((*weakref_owners)[i]) = 0;
}
delete weakref_owners;
}
}
void AddRefOwner (void** ref_owner)
{
if (!weakref_owners)
weakref_owners = new WeakRefOwnerArray (0);
weakref_owners->InsertSorted (ref_owner);
}
void RemoveRefOwner (void** ref_owner)
{
if (!weakref_owners)
return;
size_t index = weakref_owners->FindSortedKey (
csArrayCmp<void**, void**>(ref_owner));
if (index != csArrayItemNotFound)
weakref_owners->DeleteIndex (index);
}
private:
typedef csArray<void**,
csArrayElementHandler<void**>,
CS::Memory::AllocatorMalloc,
csArrayCapacityLinear<csArrayThresholdFixed<4> > > WeakRefOwnerArray;
WeakRefOwnerArray* weakref_owners;
};
} // namespace Utility
} // namespace CS
#endif // __CS_CSUTIL_WEAKREFERENCED_H__
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