summaryrefslogtreecommitdiff
path: root/Build/source/libs/cairo/cairo-1.12.8/src/cairo-compiler-private.h
blob: f3e971ebba103ad9870b655573a0468e558b028d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
/* cairo - a vector graphics library with display and print output
 *
 * Copyright © 2002 University of Southern California
 * Copyright © 2005 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it either under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation
 * (the "LGPL") or, at your option, under the terms of the Mozilla
 * Public License Version 1.1 (the "MPL"). If you do not alter this
 * notice, a recipient may use your version of this file under either
 * the MPL or the LGPL.
 *
 * You should have received a copy of the LGPL along with this library
 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
 * You should have received a copy of the MPL along with this library
 * in the file COPYING-MPL-1.1
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
 * the specific language governing rights and limitations.
 *
 * The Original Code is the cairo graphics library.
 *
 * The Initial Developer of the Original Code is University of Southern
 * California.
 *
 * Contributor(s):
 *	Carl D. Worth <cworth@cworth.org>
 */

#ifndef CAIRO_COMPILER_PRIVATE_H
#define CAIRO_COMPILER_PRIVATE_H

#include "cairo.h"

#if HAVE_CONFIG_H
#include "config.h"
#endif

/* Size in bytes of buffer to use off the stack per functions.
 * Mostly used by text functions.  For larger allocations, they'll
 * malloc(). */
#ifndef CAIRO_STACK_BUFFER_SIZE
#define CAIRO_STACK_BUFFER_SIZE (512 * sizeof (int))
#endif

#define CAIRO_STACK_ARRAY_LENGTH(T) (CAIRO_STACK_BUFFER_SIZE / sizeof(T))

/*
 * The goal of this block is to define the following macros for
 * providing faster linkage to functions in the public API for calls
 * from within cairo.
 *
 * slim_hidden_proto(f)
 * slim_hidden_proto_no_warn(f)
 *
 *   Declares `f' as a library internal function and hides the
 *   function from the global symbol table.  This macro must be
 *   expanded after `f' has been declared with a prototype but before
 *   any calls to the function are seen by the compiler.  The no_warn
 *   variant inhibits warnings about the return value being unused at
 *   call sites.  The macro works by renaming `f' to an internal name
 *   in the symbol table and hiding that.  As far as cairo internal
 *   calls are concerned they're calling a library internal function
 *   and thus don't need to bounce via the PLT.
 *
 * slim_hidden_def(f)
 *
 *   Exports `f' back to the global symbol table.  This macro must be
 *   expanded right after the function definition and only for symbols
 *   hidden previously with slim_hidden_proto().  The macro works by
 *   adding a global entry to the symbol table which points at the
 *   internal name of `f' created by slim_hidden_proto().
 *
 * Functions in the public API which aren't called by the library
 * don't need to be hidden and re-exported using the slim hidden
 * macros.
 */
#if __GNUC__ >= 3 && defined(__ELF__) && !defined(__sun)
# define slim_hidden_proto(name)		slim_hidden_proto1(name, slim_hidden_int_name(name)) cairo_private
# define slim_hidden_proto_no_warn(name)	slim_hidden_proto1(name, slim_hidden_int_name(name)) cairo_private_no_warn
# define slim_hidden_def(name)			slim_hidden_def1(name, slim_hidden_int_name(name))
# define slim_hidden_int_name(name) INT_##name
# define slim_hidden_proto1(name, internal)				\
  extern __typeof (name) name						\
	__asm__ (slim_hidden_asmname (internal))
# define slim_hidden_def1(name, internal)				\
  extern __typeof (name) EXT_##name __asm__(slim_hidden_asmname(name))	\
	__attribute__((__alias__(slim_hidden_asmname(internal))))
# define slim_hidden_ulp		slim_hidden_ulp1(__USER_LABEL_PREFIX__)
# define slim_hidden_ulp1(x)		slim_hidden_ulp2(x)
# define slim_hidden_ulp2(x)		#x
# define slim_hidden_asmname(name)	slim_hidden_asmname1(name)
# define slim_hidden_asmname1(name)	slim_hidden_ulp #name
#else
# define slim_hidden_proto(name)		int _cairo_dummy_prototype(void)
# define slim_hidden_proto_no_warn(name)	int _cairo_dummy_prototype(void)
# define slim_hidden_def(name)			int _cairo_dummy_prototype(void)
#endif

#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
#define CAIRO_PRINTF_FORMAT(fmt_index, va_index) \
	__attribute__((__format__(__printf__, fmt_index, va_index)))
#else
#define CAIRO_PRINTF_FORMAT(fmt_index, va_index)
#endif

/* slim_internal.h */
#define CAIRO_HAS_HIDDEN_SYMBOLS 1
#if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)) && \
    (defined(__ELF__) || defined(__APPLE__)) &&			\
    !defined(__sun)
#define cairo_private_no_warn	__attribute__((__visibility__("hidden")))
#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
#define cairo_private_no_warn	__hidden
#else /* not gcc >= 3.3 and not Sun Studio >= 8 */
#define cairo_private_no_warn
#undef CAIRO_HAS_HIDDEN_SYMBOLS
#endif

#ifndef WARN_UNUSED_RESULT
#define WARN_UNUSED_RESULT
#endif
/* Add attribute(warn_unused_result) if supported */
#define cairo_warn	    WARN_UNUSED_RESULT
#define cairo_private	    cairo_private_no_warn cairo_warn

/* This macro allow us to deprecate a function by providing an alias
   for the old function name to the new function name. With this
   macro, binary compatibility is preserved. The macro only works on
   some platforms --- tough.

   Meanwhile, new definitions in the public header file break the
   source code so that it will no longer link against the old
   symbols. Instead it will give a descriptive error message
   indicating that the old function has been deprecated by the new
   function.
*/
#if __GNUC__ >= 2 && defined(__ELF__)
# define CAIRO_FUNCTION_ALIAS(old, new)		\
	extern __typeof (new) old		\
	__asm__ ("" #old)			\
	__attribute__((__alias__("" #new)))
#else
# define CAIRO_FUNCTION_ALIAS(old, new)
#endif

/*
 * Cairo uses the following function attributes in order to improve the
 * generated code (effectively by manual inter-procedural analysis).
 *
 *   'cairo_pure': The function is only allowed to read from its arguments
 *                 and global memory (i.e. following a pointer argument or
 *                 accessing a shared variable). The return value should
 *                 only depend on its arguments, and for an identical set of
 *                 arguments should return the same value.
 *
 *   'cairo_const': The function is only allowed to read from its arguments.
 *                  It is not allowed to access global memory. The return
 *                  value should only depend its arguments, and for an
 *                  identical set of arguments should return the same value.
 *                  This is currently the most strict function attribute.
 *
 * Both these function attributes allow gcc to perform CSE and
 * constant-folding, with 'cairo_const 'also guaranteeing that pointer contents
 * do not change across the function call.
 */
#if __GNUC__ >= 3
#define cairo_pure __attribute__((pure))
#define cairo_const __attribute__((const))
#define cairo_always_inline inline __attribute__((always_inline))
#else
#define cairo_pure
#define cairo_const
#define cairo_always_inline inline
#endif

#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
#define likely(expr) (__builtin_expect (!!(expr), 1))
#define unlikely(expr) (__builtin_expect (!!(expr), 0))
#else
#define likely(expr) (expr)
#define unlikely(expr) (expr)
#endif

#ifndef __GNUC__
#undef __attribute__
#define __attribute__(x)
#endif

#if (defined(__WIN32__) && !defined(__WINE__)) || defined(_MSC_VER)
#define access _access
#define fdopen _fdopen
#define hypot _hypot
#define pclose _pclose
#define popen _popen
#define snprintf _snprintf
#define strdup _strdup
#define unlink _unlink
#define vsnprintf _vsnprintf
#endif

#ifdef _MSC_VER
#ifndef __cplusplus
#undef inline
#define inline __inline
#endif
#endif

#if defined(_MSC_VER) && defined(_M_IX86)
/* When compiling with /Gy and /OPT:ICF identical functions will be folded in together.
   The CAIRO_ENSURE_UNIQUE macro ensures that a function is always unique and
   will never be folded into another one. Something like this might eventually
   be needed for GCC but it seems fine for now. */
#define CAIRO_ENSURE_UNIQUE                       \
    do {                                          \
	char func[] = __FUNCTION__;               \
	char file[] = __FILE__;                   \
	__asm {                                   \
	    __asm jmp __internal_skip_line_no     \
	    __asm _emit (__LINE__ & 0xff)         \
	    __asm _emit ((__LINE__>>8) & 0xff)    \
	    __asm _emit ((__LINE__>>16) & 0xff)   \
	    __asm _emit ((__LINE__>>24) & 0xff)   \
	    __asm lea eax, func                   \
	    __asm lea eax, file                   \
	    __asm __internal_skip_line_no:        \
	};                                        \
    } while (0)
#else
#define CAIRO_ENSURE_UNIQUE    do { } while (0)
#endif

#ifdef __STRICT_ANSI__
#undef inline
#define inline __inline__
#endif

#endif