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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.
* 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.
*/
#ifndef __ATOMIC_OPS_UTILS_H__
#define __ATOMIC_OPS_UTILS_H__
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
/* little macro so inline keyword works */
#if defined(_MSC_VER)
# define ATOMIC_INLINE static __forceinline
#else
# define ATOMIC_INLINE static inline __attribute__((always_inline))
#endif
#ifdef __GNUC__
# define _ATOMIC_LIKELY(x) __builtin_expect(!!(x), 1)
# define _ATOMIC_UNLIKELY(x) __builtin_expect(!!(x), 0)
#else
# define _ATOMIC_LIKELY(x) (x)
# define _ATOMIC_UNLIKELY(x) (x)
#endif
#if defined(__SIZEOF_POINTER__)
# define LG_SIZEOF_PTR __SIZEOF_POINTER__
#elif defined(UINTPTR_MAX)
# if (UINTPTR_MAX == 0xFFFFFFFF)
# define LG_SIZEOF_PTR 4
# elif (UINTPTR_MAX == 0xFFFFFFFFFFFFFFFF)
# define LG_SIZEOF_PTR 8
# endif
#elif defined(__WORDSIZE) /* Fallback for older glibc and cpp */
# if (__WORDSIZE == 32)
# define LG_SIZEOF_PTR 4
# elif (__WORDSIZE == 64)
# define LG_SIZEOF_PTR 8
# endif
#endif
#ifndef LG_SIZEOF_PTR
# error "Cannot find pointer size"
#endif
#if (UINT_MAX == 0xFFFFFFFF)
# define LG_SIZEOF_INT 4
#elif (UINT_MAX == 0xFFFFFFFFFFFFFFFF)
# define LG_SIZEOF_INT 8
#else
# error "Cannot find int size"
#endif
/* Copied from BLI_utils... */
/* C++ can't use _Static_assert, expects static_assert() but c++0x only,
* Coverity also errors out. */
#if (!defined(__cplusplus)) && (!defined(__COVERITY__)) && \
(defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 406)) /* gcc4.6+ only */
# define ATOMIC_STATIC_ASSERT(a, msg) __extension__ _Static_assert(a, msg);
#else
/* Code adapted from http://www.pixelbeat.org/programming/gcc/static_assert.html */
/* Note we need the two concats below because arguments to ## are not expanded, so we need to
* expand __LINE__ with one indirection before doing the actual concatenation. */
# define ATOMIC_ASSERT_CONCAT_(a, b) a##b
# define ATOMIC_ASSERT_CONCAT(a, b) ATOMIC_ASSERT_CONCAT_(a, b)
/* These can't be used after statements in c89. */
# if defined(__COUNTER__) /* MSVC */
# define ATOMIC_STATIC_ASSERT(a, msg) \
; \
enum { ATOMIC_ASSERT_CONCAT(static_assert_, __COUNTER__) = 1 / (int)(!!(a)) };
# else /* older gcc, clang... */
/* This can't be used twice on the same line so ensure if using in headers
* that the headers are not included twice (by wrapping in #ifndef...#endif)
* Note it doesn't cause an issue when used on same line of separate modules
* compiled with gcc -combine -fwhole-program. */
# define ATOMIC_STATIC_ASSERT(a, msg) \
; \
enum { ATOMIC_ASSERT_CONCAT(assert_line_, __LINE__) = 1 / (int)(!!(a)) };
# endif
#endif
#endif /* __ATOMIC_OPS_UTILS_H__ */
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