forked from KolibriOS/kolibrios
247 lines
9.1 KiB
C
247 lines
9.1 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2002 University of Southern California
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* Copyright © 2005 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#ifndef CAIRO_COMPILER_PRIVATE_H
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#define CAIRO_COMPILER_PRIVATE_H
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#include "cairo.h"
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* Size in bytes of buffer to use off the stack per functions.
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* Mostly used by text functions. For larger allocations, they'll
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* malloc(). */
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#ifndef CAIRO_STACK_BUFFER_SIZE
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#define CAIRO_STACK_BUFFER_SIZE (512 * sizeof (int))
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#endif
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#define CAIRO_STACK_ARRAY_LENGTH(T) (CAIRO_STACK_BUFFER_SIZE / sizeof(T))
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/*
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* The goal of this block is to define the following macros for
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* providing faster linkage to functions in the public API for calls
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* from within cairo.
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*
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* slim_hidden_proto(f)
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* slim_hidden_proto_no_warn(f)
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*
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* Declares `f' as a library internal function and hides the
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* function from the global symbol table. This macro must be
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* expanded after `f' has been declared with a prototype but before
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* any calls to the function are seen by the compiler. The no_warn
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* variant inhibits warnings about the return value being unused at
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* call sites. The macro works by renaming `f' to an internal name
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* in the symbol table and hiding that. As far as cairo internal
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* calls are concerned they're calling a library internal function
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* and thus don't need to bounce via the PLT.
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*
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* slim_hidden_def(f)
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*
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* Exports `f' back to the global symbol table. This macro must be
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* expanded right after the function definition and only for symbols
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* hidden previously with slim_hidden_proto(). The macro works by
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* adding a global entry to the symbol table which points at the
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* internal name of `f' created by slim_hidden_proto().
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*
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* Functions in the public API which aren't called by the library
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* don't need to be hidden and re-exported using the slim hidden
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* macros.
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*/
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#if __GNUC__ >= 3 && defined(__ELF__) && !defined(__sun)
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# define slim_hidden_proto(name) slim_hidden_proto1(name, slim_hidden_int_name(name)) cairo_private
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# define slim_hidden_proto_no_warn(name) slim_hidden_proto1(name, slim_hidden_int_name(name)) cairo_private_no_warn
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# define slim_hidden_def(name) slim_hidden_def1(name, slim_hidden_int_name(name))
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# define slim_hidden_int_name(name) INT_##name
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# define slim_hidden_proto1(name, internal) \
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extern __typeof (name) name \
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__asm__ (slim_hidden_asmname (internal))
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# define slim_hidden_def1(name, internal) \
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extern __typeof (name) EXT_##name __asm__(slim_hidden_asmname(name)) \
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__attribute__((__alias__(slim_hidden_asmname(internal))))
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# define slim_hidden_ulp slim_hidden_ulp1(__USER_LABEL_PREFIX__)
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# define slim_hidden_ulp1(x) slim_hidden_ulp2(x)
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# define slim_hidden_ulp2(x) #x
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# define slim_hidden_asmname(name) slim_hidden_asmname1(name)
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# define slim_hidden_asmname1(name) slim_hidden_ulp #name
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#else
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# define slim_hidden_proto(name) int _cairo_dummy_prototype(void)
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# define slim_hidden_proto_no_warn(name) int _cairo_dummy_prototype(void)
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# define slim_hidden_def(name) int _cairo_dummy_prototype(void)
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#endif
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#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
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#define CAIRO_PRINTF_FORMAT(fmt_index, va_index) \
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__attribute__((__format__(__printf__, fmt_index, va_index)))
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#else
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#define CAIRO_PRINTF_FORMAT(fmt_index, va_index)
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#endif
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/* slim_internal.h */
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#define CAIRO_HAS_HIDDEN_SYMBOLS 1
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#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)) && \
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(defined(__ELF__) || defined(__APPLE__)) && \
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!defined(__sun)
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#define cairo_private_no_warn __attribute__((__visibility__("hidden")))
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#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
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#define cairo_private_no_warn __hidden
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#else /* not gcc >= 3.3 and not Sun Studio >= 8 */
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#define cairo_private_no_warn
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#undef CAIRO_HAS_HIDDEN_SYMBOLS
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#endif
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#ifndef WARN_UNUSED_RESULT
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#define WARN_UNUSED_RESULT
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#endif
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/* Add attribute(warn_unused_result) if supported */
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#define cairo_warn WARN_UNUSED_RESULT
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#define cairo_private cairo_private_no_warn cairo_warn
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/* This macro allow us to deprecate a function by providing an alias
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for the old function name to the new function name. With this
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macro, binary compatibility is preserved. The macro only works on
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some platforms --- tough.
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Meanwhile, new definitions in the public header file break the
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source code so that it will no longer link against the old
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symbols. Instead it will give a descriptive error message
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indicating that the old function has been deprecated by the new
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function.
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*/
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#if __GNUC__ >= 2 && defined(__ELF__)
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# define CAIRO_FUNCTION_ALIAS(old, new) \
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extern __typeof (new) old \
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__asm__ ("" #old) \
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__attribute__((__alias__("" #new)))
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#else
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# define CAIRO_FUNCTION_ALIAS(old, new)
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#endif
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/*
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* Cairo uses the following function attributes in order to improve the
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* generated code (effectively by manual inter-procedural analysis).
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*
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* 'cairo_pure': The function is only allowed to read from its arguments
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* and global memory (i.e. following a pointer argument or
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* accessing a shared variable). The return value should
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* only depend on its arguments, and for an identical set of
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* arguments should return the same value.
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*
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* 'cairo_const': The function is only allowed to read from its arguments.
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* It is not allowed to access global memory. The return
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* value should only depend its arguments, and for an
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* identical set of arguments should return the same value.
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* This is currently the most strict function attribute.
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*
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* Both these function attributes allow gcc to perform CSE and
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* constant-folding, with 'cairo_const 'also guaranteeing that pointer contents
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* do not change across the function call.
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*/
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#if __GNUC__ >= 3
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#define cairo_pure __attribute__((pure))
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#define cairo_const __attribute__((const))
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#define cairo_always_inline inline __attribute__((always_inline))
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#else
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#define cairo_pure
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#define cairo_const
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#define cairo_always_inline inline
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#endif
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#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
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#define likely(expr) (__builtin_expect (!!(expr), 1))
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#define unlikely(expr) (__builtin_expect (!!(expr), 0))
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#else
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#define likely(expr) (expr)
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#define unlikely(expr) (expr)
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#endif
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#ifndef __GNUC__
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#undef __attribute__
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#define __attribute__(x)
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#endif
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#if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
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#define access _access
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#define fdopen _fdopen
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#define hypot _hypot
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#define pclose _pclose
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#define popen _popen
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#define snprintf _snprintf
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#define strdup _strdup
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#define unlink _unlink
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#define vsnprintf _vsnprintf
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#endif
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#ifdef _MSC_VER
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#ifndef __cplusplus
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#undef inline
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#define inline __inline
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#endif
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#endif
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#if defined(_MSC_VER) && defined(_M_IX86)
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/* When compiling with /Gy and /OPT:ICF identical functions will be folded in together.
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The CAIRO_ENSURE_UNIQUE macro ensures that a function is always unique and
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will never be folded into another one. Something like this might eventually
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be needed for GCC but it seems fine for now. */
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#define CAIRO_ENSURE_UNIQUE \
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do { \
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char func[] = __FUNCTION__; \
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char file[] = __FILE__; \
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__asm { \
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__asm jmp __internal_skip_line_no \
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__asm _emit (__LINE__ & 0xff) \
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__asm _emit ((__LINE__>>8) & 0xff) \
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__asm _emit ((__LINE__>>16) & 0xff) \
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__asm _emit ((__LINE__>>24) & 0xff) \
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__asm lea eax, func \
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__asm lea eax, file \
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__asm __internal_skip_line_no: \
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}; \
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} while (0)
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#else
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#define CAIRO_ENSURE_UNIQUE do { } while (0)
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#endif
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#ifdef __STRICT_ANSI__
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#undef inline
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#define inline __inline__
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#endif
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#endif
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