/*
 * Copyright (c) 2002-2012 Balabit
 * Copyright (c) 1998-2012 Balázs Scheidler
 *
 * This 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 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As an additional exemption you are allowed to compile & link against the
 * OpenSSL libraries as published by the OpenSSL project. See the file
 * COPYING for details.
 *
 */
  
#ifndef ATOMIC_H_INCLUDED
#define ATOMIC_H_INCLUDED


typedef struct
{
  gint counter;
} GAtomicCounter;

static inline void
g_atomic_counter_inc(GAtomicCounter *c)
{
  g_atomic_int_inc(&c->counter);
}

static inline gboolean
g_atomic_counter_dec_and_test(GAtomicCounter *c)
{
  return g_atomic_int_dec_and_test(&c->counter);
}

static inline gint
g_atomic_counter_get(GAtomicCounter *c)
{
  return g_atomic_int_get(&c->counter);
}

static inline gint
g_atomic_counter_exchange_and_add(GAtomicCounter *c, gint val)
{
#if GLIB_CHECK_VERSION(2, 30, 0)
  return g_atomic_int_add(&c->counter, val);
#else
  return g_atomic_int_exchange_and_add(&c->counter, val);
#endif
}

static inline gint
g_atomic_counter_racy_get(GAtomicCounter *c)
{
  return c->counter;
}

static inline void
g_atomic_counter_set(GAtomicCounter *c, gint value)
{
  /* FIXME: we should use g_atomic_int_set, but that's available starting
   * with GLib 2.10 only, and we only use this function for initialization,
   * thus atomic write is not strictly needed as there's no concurrency
   * while initializing a refcounter.
   */
  
  c->counter = value;
}

#endif
