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/*************************************************************************
* Copyright (C) 2011 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Generic reference count implementation.
*/
/**
* Increment a reference count.
* @param[in,out] object The reference-counted object to acquire.
*/
#define DMNSN_INCREF(obj) ((void)++(*(obj)->refcount))
/**
* @internal
* Decrement a reference count.
* @param[in,out] object The reference-counted object to release.
* @return Whether the object is now garbage.
*/
#define DMNSN_DECREF(obj) (*(obj)->refcount == 0 || --(*(obj)->refcount) == 0)
/**
* Reference counter.
*/
typedef unsigned int dmnsn_refcount;
/**
* @internal
* Create a reference count.
* @return A new reference counter, initialized to zero (a "borrowed" reference,
* which will be garbage-collected the first time it is deleted).
*/
dmnsn_refcount *dmnsn_new_refcount(void);
/**
* @internal
* Delete a reference count. Raises an error if the reference count wasn't
* zero.
*/
void dmnsn_delete_refcount(dmnsn_refcount *refcount);
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