From 45c24f05d023a2cd8289ed40a13708392ce2e6a4 Mon Sep 17 00:00:00 2001 From: Moonchild Date: Mon, 1 Oct 2018 15:25:04 +0200 Subject: Revert "Update ffvpx code to 4.0.2" --- media/ffvpx/libavutil/atomic.h | 79 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 media/ffvpx/libavutil/atomic.h (limited to 'media/ffvpx/libavutil/atomic.h') diff --git a/media/ffvpx/libavutil/atomic.h b/media/ffvpx/libavutil/atomic.h new file mode 100644 index 000000000..15906d24c --- /dev/null +++ b/media/ffvpx/libavutil/atomic.h @@ -0,0 +1,79 @@ +/* + * Copyright (c) 2012 Ronald S. Bultje + * + * 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 */ -- cgit v1.2.3