/*
  * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg 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.
  *

  * FFmpeg 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 FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVUTIL_ATOMIC_H
 #define AVUTIL_ATOMIC_H
 
 #include "config.h"
 

 #if HAVE_ATOMICS_NATIVE
 

 #if HAVE_ATOMICS_GCC

 #include "atomic_gcc.h"

 #elif HAVE_ATOMICS_WIN32

 #include "atomic_win32.h"

 #elif HAVE_ATOMICS_SUNCC

 #include "atomic_suncc.h"

 #endif
 

 #else
 
 /**
  * Load the current value stored in an atomic integer.
  *
  * @param ptr atomic integer
  * @return the current value of the atomic integer
  * @note This acts as a memory barrier.
  */
 int avpriv_atomic_int_get(volatile int *ptr);
 
 /**
  * Store a new value in an atomic integer.
  *
  * @param ptr atomic integer
  * @param val the value to store in the atomic integer
  * @note This acts as a memory barrier.
  */
 void avpriv_atomic_int_set(volatile int *ptr, int val);
 
 /**
  * Add a value to an atomic integer.
  *
  * @param ptr atomic integer
  * @param inc the value to add to the atomic integer (may be negative)
  * @return the new value of the atomic integer.
  * @note This does NOT act as a memory barrier. This is primarily
  *       intended for reference counting.
  */
 int avpriv_atomic_int_add_and_fetch(volatile int *ptr, int inc);
 
 /**
  * Atomic pointer compare and swap.
  *
  * @param ptr pointer to the pointer to operate on
  * @param oldval do the swap if the current value of *ptr equals to oldval
  * @param newval value to replace *ptr with
  * @return the value of *ptr before comparison
  */
 void *avpriv_atomic_ptr_cas(void * volatile *ptr, void *oldval, void *newval);
 

 #endif /* HAVE_ATOMICS_NATIVE */
 

 #endif /* AVUTIL_ATOMIC_H */