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/*
* Original code from jemalloc with this license:
*
* Copyright (C) 2002-2013 Jason Evans <jasone@canonware.com>.
* All rights reserved.
* Copyright (C) 2007-2012 Mozilla Foundation. All rights reserved.
* Copyright (C) 2009-2013 Facebook, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice(s),
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice(s),
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2016 Blender Foundation.
* All rights reserved.
*
* The Original Code is: adapted from jemalloc.
*
* ***** END GPL LICENSE BLOCK *****
*/
/**
* \file atomic_ops.h
* \ingroup Atomic
*
* \author Copyright (C) 2016 Blender Foundation, adapted from jemalloc.
* \brief Provides wrapper around system-specific atomic primitives, and some extensions (faked-atomic operations
* over float numbers).
*/
#ifndef __ATOMIC_OPS_H__
#define __ATOMIC_OPS_H__
#if defined(__arm__)
/* Attempt to fix compilation error on Debian armel kernel.
* arm7 architecture does have both 32 and 64bit atomics, however
* it's gcc doesn't have __GCC_HAVE_SYNC_COMPARE_AND_SWAP_n defined.
*/
# define JE_FORCE_SYNC_COMPARE_AND_SWAP_1
# define JE_FORCE_SYNC_COMPARE_AND_SWAP_4
# define JE_FORCE_SYNC_COMPARE_AND_SWAP_8
#endif
#include "intern/atomic_ops_utils.h"
/******************************************************************************/
/* Function prototypes. */
#if (LG_SIZEOF_PTR == 8 || LG_SIZEOF_INT == 8)
ATOMIC_INLINE uint64_t atomic_add_and_fetch_uint64(uint64_t *p, uint64_t x);
ATOMIC_INLINE uint64_t atomic_sub_and_fetch_uint64(uint64_t *p, uint64_t x);
ATOMIC_INLINE uint64_t atomic_fetch_and_add_uint64(uint64_t *p, uint64_t x);
ATOMIC_INLINE uint64_t atomic_fetch_and_sub_uint64(uint64_t *p, uint64_t x);
ATOMIC_INLINE uint64_t atomic_cas_uint64(uint64_t *v, uint64_t old, uint64_t _new);
#endif
ATOMIC_INLINE uint32_t atomic_add_and_fetch_uint32(uint32_t *p, uint32_t x);
ATOMIC_INLINE uint32_t atomic_sub_and_fetch_uint32(uint32_t *p, uint32_t x);
ATOMIC_INLINE uint32_t atomic_cas_uint32(uint32_t *v, uint32_t old, uint32_t _new);
ATOMIC_INLINE uint32_t atomic_fetch_and_add_uint32(uint32_t *p, uint32_t x);
ATOMIC_INLINE uint32_t atomic_fetch_and_or_uint32(uint32_t *p, uint32_t x);
ATOMIC_INLINE uint32_t atomic_fetch_and_and_uint32(uint32_t *p, uint32_t x);
ATOMIC_INLINE uint8_t atomic_fetch_and_or_uint8(uint8_t *p, uint8_t b);
ATOMIC_INLINE uint8_t atomic_fetch_and_and_uint8(uint8_t *p, uint8_t b);
ATOMIC_INLINE size_t atomic_add_and_fetch_z(size_t *p, size_t x);
ATOMIC_INLINE size_t atomic_sub_and_fetch_z(size_t *p, size_t x);
ATOMIC_INLINE size_t atomic_fetch_and_add_z(size_t *p, size_t x);
ATOMIC_INLINE size_t atomic_fetch_and_sub_z(size_t *p, size_t x);
ATOMIC_INLINE size_t atomic_cas_z(size_t *v, size_t old, size_t _new);
ATOMIC_INLINE unsigned int atomic_add_and_fetch_u(unsigned int *p, unsigned int x);
ATOMIC_INLINE unsigned int atomic_sub_and_fetch_u(unsigned int *p, unsigned int x);
ATOMIC_INLINE unsigned int atomic_fetch_and_add_u(unsigned int *p, unsigned int x);
ATOMIC_INLINE unsigned int atomic_fetch_and_sub_u(unsigned int *p, unsigned int x);
ATOMIC_INLINE unsigned int atomic_cas_u(unsigned int *v, unsigned int old, unsigned int _new);
/* WARNING! Float 'atomics' are really faked ones, those are actually closer to some kind of spinlock-sync'ed operation,
* which means they are only efficient if collisions are highly unlikely (i.e. if probability of two threads
* working on the same pointer at the same time is very low). */
ATOMIC_INLINE float atomic_add_and_fetch_fl(float *p, const float x);
/******************************************************************************/
/* Include system-dependent implementations. */
/* Note that we are using _unix flavor as fallback here (it will raise precompiler errors as needed). */
#if defined(_MSC_VER)
# include "intern/atomic_ops_msvc.h"
#else
# include "intern/atomic_ops_unix.h"
#endif
/* Include 'fake' atomic extensions, built over real atomic primitives. */
#include "intern/atomic_ops_ext.h"
#endif /* __ATOMIC_OPS_H__ */
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