mirror of https://gitlab.freedesktop.org/mesa/mesa
193 lines
4.5 KiB
C
193 lines
4.5 KiB
C
/**************************************************************************
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*
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* Copyright 2007-2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef P_COMPILER_H
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#define P_COMPILER_H
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#include "c99_compat.h" /* inline, __func__, etc. */
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#include "p_config.h"
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#include "util/macros.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <limits.h>
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#if defined(_WIN32) && !defined(__WIN32__)
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#define __WIN32__
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#endif
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#if defined(_MSC_VER)
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#include <intrin.h>
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/* Avoid 'expression is always true' warning */
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#pragma warning(disable: 4296)
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#endif /* _MSC_VER */
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if !defined(__HAIKU__) && !defined(__USE_MISC)
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#if !defined(PIPE_OS_ANDROID)
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typedef unsigned int uint;
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#endif
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typedef unsigned short ushort;
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#endif
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typedef unsigned char ubyte;
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typedef unsigned char boolean;
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#ifndef TRUE
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#define TRUE true
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#endif
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#ifndef FALSE
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#define FALSE false
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#endif
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#ifndef va_copy
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#ifdef __va_copy
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#define va_copy(dest, src) __va_copy((dest), (src))
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#else
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#define va_copy(dest, src) (dest) = (src)
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#endif
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#endif
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/* XXX: Use standard `__func__` instead */
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#ifndef __FUNCTION__
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# define __FUNCTION__ __func__
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#endif
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/* This should match linux gcc cdecl semantics everywhere, so that we
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* just codegen one calling convention on all platforms.
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*/
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#ifdef _MSC_VER
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#define PIPE_CDECL __cdecl
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#else
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#define PIPE_CDECL
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#endif
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#if defined(__GNUC__)
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#define PIPE_DEPRECATED __attribute__((__deprecated__))
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#else
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#define PIPE_DEPRECATED
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#endif
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/* Macros for data alignment. */
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#if defined(__GNUC__)
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/* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Type-Attributes.html */
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#define PIPE_ALIGN_TYPE(_alignment, _type) _type __attribute__((aligned(_alignment)))
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/* See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Variable-Attributes.html */
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#define PIPE_ALIGN_VAR(_alignment) __attribute__((aligned(_alignment)))
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#if defined(__GNUC__) && defined(PIPE_ARCH_X86)
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#define PIPE_ALIGN_STACK __attribute__((force_align_arg_pointer))
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#else
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#define PIPE_ALIGN_STACK
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#endif
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#elif defined(_MSC_VER)
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/* See http://msdn.microsoft.com/en-us/library/83ythb65.aspx */
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#define PIPE_ALIGN_TYPE(_alignment, _type) __declspec(align(_alignment)) _type
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#define PIPE_ALIGN_VAR(_alignment) __declspec(align(_alignment))
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#define PIPE_ALIGN_STACK
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#elif defined(SWIG)
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#define PIPE_ALIGN_TYPE(_alignment, _type) _type
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#define PIPE_ALIGN_VAR(_alignment)
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#define PIPE_ALIGN_STACK
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#else
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#error "Unsupported compiler"
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#endif
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/**
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* Declare a variable on its own cache line.
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*
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* This helps eliminate "False sharing" to make atomic operations
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* on pipe_reference::count faster and/or access to adjacent fields faster.
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*
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* https://en.wikipedia.org/wiki/False_sharing
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*
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* CALLOC_STRUCT_CL or MALLOC_STRUCT_CL and FREE_CL should be used to allocate
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* structures that contain this.
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*
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* NOTE: Don't use PIPE_ALIGN_VAR because it causes the whole structure to be
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* aligned, but we only want to align the field.
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*/
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#define EXCLUSIVE_CACHELINE(decl) \
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union { char __cl_space[CACHE_LINE_SIZE]; \
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decl; }
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#if defined(__GNUC__)
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#define PIPE_READ_WRITE_BARRIER() __asm__("":::"memory")
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#elif defined(_MSC_VER)
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#define PIPE_READ_WRITE_BARRIER() _ReadWriteBarrier()
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#else
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#warning "Unsupported compiler"
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#define PIPE_READ_WRITE_BARRIER() /* */
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#endif
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#if defined(__cplusplus)
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}
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#endif
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#endif /* P_COMPILER_H */
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