/*************************************************************************
 * Copyright (C) 2010-2011 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
 * Reference count internal API.
 */

/**
 * Initialize a reference count.
 * @param[in,out] object  The reference-counted object.
 */
#define DMNSN_REFCOUNT_INIT(object) (void)((object)->DMNSN_REFCOUNT_FIELD = 1)

/**
 * Initialize a reference count in a statically-allocated object.
 */
#define DMNSN_REFCOUNT_INITIALIZER .DMNSN_REFCOUNT_FIELD = 1

/**
 * Decrement a reference count.
 * @param[in,out] object  The reference-counted object to release.
 * @return Whether the object is now garbage.
 */
#define DMNSN_DECREF(object)                                            \
  ((object) && ((object)->DMNSN_REFCOUNT_FIELD == 0                     \
                || --(object)->DMNSN_REFCOUNT_FIELD == 0))