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/**************************************************************************
*
* Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef P_COMPILER_H
#define P_COMPILER_H
#include "p_config.h"
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdarg.h>
#if defined(_WIN32) && !defined(__WIN32__)
#define __WIN32__
#endif
#if defined(_MSC_VER)
/* Avoid 'expression is always true' warning */
#pragma warning(disable: 4296)
#endif /* _MSC_VER */
/*
* Alternative stdint.h and stdbool.h headers are supplied in include/c99 for
* systems that lack it.
*/
#ifndef __STDC_LIMIT_MACROS
#define __STDC_LIMIT_MACROS 1
#endif
#include <stdint.h>
#include <stdbool.h>
#if !defined(__HAIKU__) && !defined(__USE_MISC)
typedef unsigned int uint;
typedef unsigned short ushort;
#endif
typedef unsigned char ubyte;
typedef unsigned char boolean;
#ifndef TRUE
#define TRUE true
#endif
#ifndef FALSE
#define FALSE false
#endif
/* Function inlining */
#ifndef INLINE
# ifdef __cplusplus
# define INLINE inline
# elif defined(__GNUC__)
# define INLINE __inline__
# elif defined(_MSC_VER)
# define INLINE __inline
# elif defined(__ICL)
# define INLINE __inline
# elif defined(__INTEL_COMPILER)
# define INLINE inline
# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100)
# define INLINE __inline
# elif defined(__SUNPRO_C) && defined(__C99FEATURES__)
# define INLINE inline
# elif (__STDC_VERSION__ >= 199901L) /* C99 */
# define INLINE inline
# else
# define INLINE
# endif
#endif
/* Function visibility */
#ifndef PUBLIC
# if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
# define PUBLIC __attribute__((visibility("default")))
# elif defined(_MSC_VER)
# define PUBLIC __declspec(dllexport)
# else
# define PUBLIC
# endif
#endif
/* The __FUNCTION__ gcc variable is generally only used for debugging.
* If we're not using gcc, define __FUNCTION__ as a cpp symbol here.
*/
#ifndef __FUNCTION__
# if !defined(__GNUC__)
# if (__STDC_VERSION__ >= 199901L) /* C99 */ || \
(defined(__SUNPRO_C) && defined(__C99FEATURES__))
# define __FUNCTION__ __func__
# else
# define __FUNCTION__ "<unknown>"
# endif
# endif
# if defined(_MSC_VER) && _MSC_VER < 1300
# define __FUNCTION__ "<unknown>"
# endif
#endif
/* This should match linux gcc cdecl semantics everywhere, so that we
* just codegen one calling convention on all platforms.
*/
#ifdef _MSC_VER
#define PIPE_CDECL __cdecl
#else
#define PIPE_CDECL
#endif
#if defined(__GNUC__)
#define PIPE_DEPRECATED __attribute__((__deprecated__))
#else
#define PIPE_DEPRECATED
#endif
/* Macros for data alignment. */
#if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
/* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Type-Attributes.html */
#define PIPE_ALIGN_TYPE(_alignment, _type) _type __attribute__((aligned(_alignment)))
/* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Variable-Attributes.html */
#define PIPE_ALIGN_VAR(_alignment) __attribute__((aligned(_alignment)))
#if (__GNUC__ > 4 || (__GNUC__ == 4 &&__GNUC_MINOR__>1)) && !defined(PIPE_ARCH_X86_64)
#define PIPE_ALIGN_STACK __attribute__((force_align_arg_pointer))
#else
#define PIPE_ALIGN_STACK
#endif
#elif defined(_MSC_VER)
/* See http://msdn.microsoft.com/en-us/library/83ythb65.aspx */
#define PIPE_ALIGN_TYPE(_alignment, _type) __declspec(align(_alignment)) _type
#define PIPE_ALIGN_VAR(_alignment) __declspec(align(_alignment))
#define PIPE_ALIGN_STACK
#elif defined(SWIG)
#define PIPE_ALIGN_TYPE(_alignment, _type) _type
#define PIPE_ALIGN_VAR(_alignment)
#define PIPE_ALIGN_STACK
#else
#error "Unsupported compiler"
#endif
#if defined(__GNUC__)
#define PIPE_READ_WRITE_BARRIER() __asm__("":::"memory")
#elif defined(_MSC_VER)
void _ReadWriteBarrier(void);
#pragma intrinsic(_ReadWriteBarrier)
#define PIPE_READ_WRITE_BARRIER() _ReadWriteBarrier()
#else
#warning "Unsupported compiler"
#define PIPE_READ_WRITE_BARRIER() /* */
#endif
/* You should use these macros to mark if blocks where the if condition
* is either likely to be true, or unlikely to be true.
*
* This will inform human readers of this fact, and will also inform
* the compiler, who will in turn inform the CPU.
*
* CPUs often start executing code inside the if or the else blocks
* without knowing whether the condition is true or not, and will have
* to throw the work away if they find out later they executed the
* wrong part of the if.
*
* If these macros are used, the CPU is more likely to correctly predict
* the right path, and will avoid speculatively executing the wrong branch,
* thus not throwing away work, resulting in better performance.
*
* In light of this, it is also a good idea to mark as "likely" a path
* which is not necessarily always more likely, but that will benefit much
* more from performance improvements since it is already much faster than
* the other path, or viceversa with "unlikely".
*
* Example usage:
* if(unlikely(do_we_need_a_software_fallback()))
* do_software_fallback();
* else
* render_with_gpu();
*
* The macros follow the Linux kernel convention, and more examples can
* be found there.
*
* Note that profile guided optimization can offer better results, but
* needs an appropriate coverage suite and does not inform human readers.
*/
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) !!(x)
#define unlikely(x) !!(x)
#endif
#endif /* P_COMPILER_H */
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