mirror of
https://github.com/UberGames/GtkRadiant.git
synced 2024-11-29 15:11:54 +00:00
66 lines
2.7 KiB
C++
66 lines
2.7 KiB
C++
/*
|
|
Copyright (C) 1999-2007 id Software, Inc. and contributors.
|
|
For a list of contributors, see the accompanying CONTRIBUTORS file.
|
|
|
|
This file is part of GtkRadiant.
|
|
|
|
GtkRadiant is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
GtkRadiant 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GtkRadiant; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef __IREFCOUNT_H__
|
|
#define __IREFCOUNT_H__
|
|
|
|
/*!
|
|
\class IRefCounted
|
|
\brief reference counted objects
|
|
|
|
general hints: how to use ref count properly
|
|
we consider ref counting as an extension of new and delete operators
|
|
the main issue is 'when to incref' 'when to decref'
|
|
in most cases connected to function calls
|
|
the general thinking about that:
|
|
- if you get a pointer to a refcounted object through a call to a function, assume that this object has been 'reserved' for you
|
|
already (i.e. allocated if you think this the new/delete way). so if you keep the object, you don't need to incref it, and if
|
|
you don't keep it you need to decref it.
|
|
- if you are called in a function and a refcounted object passed as parameter, then you should assume that this is an optional
|
|
object given to you FYI, which you don't need to decref if you don't keep / need to incref if you keep
|
|
|
|
refcount is initialized to 1 in constructor. that serves for static objects and memory allocator
|
|
when you allocate in memory a ref counted object, it's default ref count will be 1, you should never delete it but just call DecRef on it
|
|
|
|
define an interface and an implementation macro to make things easier
|
|
NOTE: we may have to provide a static library to go with that
|
|
in case we would move irecount.h out of here into libs/
|
|
|
|
\todo functionality needed:
|
|
mostly enable/disable some features with compile time flags (independently from each other as much as possible)
|
|
- log the destructor calls with != 0 ref count
|
|
- log all incref/decref (with module info, and maybe even file/line number etc.?)
|
|
*/
|
|
class IRefCounted
|
|
{
|
|
int refCount;
|
|
public:
|
|
IRefCounted() { refCount = 1; }
|
|
virtual ~IRefCounted() { }
|
|
void IncRef() { refCount++; }
|
|
void DecRef() {
|
|
refCount--; if ( refCount <= 0 ) {
|
|
delete this;
|
|
}
|
|
}
|
|
};
|
|
|
|
#endif // __ISYNAPSE_H__
|