1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * SPDX-License-Identifier: LGPL-2.1-or-later
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
27 /* This file must not include any other glib header file and must thus
28 * not refer to variables from glibconfig.h
31 #ifndef __G_MACROS_H__
32 #define __G_MACROS_H__
34 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
35 #error "Only <glib.h> can be included directly."
38 /* We include stddef.h to get the system's definition of NULL
43 * Note: Clang (but not clang-cl) defines __GNUC__ and __GNUC_MINOR__.
44 * Both Clang 11.1 on current Arch Linux and Apple's Clang 12.0 define
45 * __GNUC__ = 4 and __GNUC_MINOR__ = 2. So G_GNUC_CHECK_VERSION(4, 2) on
46 * current Clang will be 1.
49 #define G_GNUC_CHECK_VERSION(major, minor) \
50 ((__GNUC__ > (major)) || \
51 ((__GNUC__ == (major)) && \
52 (__GNUC_MINOR__ >= (minor))))
54 #define G_GNUC_CHECK_VERSION(major, minor) 0
57 /* Here we provide G_GNUC_EXTENSION as an alias for __extension__,
58 * where this is valid. This allows for warningless compilation of
59 * "long long" types even in the presence of '-ansi -pedantic'.
61 #if G_GNUC_CHECK_VERSION(2, 8)
62 #define G_GNUC_EXTENSION __extension__
64 #define G_GNUC_EXTENSION
67 #if !defined (__cplusplus)
69 # undef G_CXX_STD_VERSION
70 # define G_CXX_STD_CHECK_VERSION(version) (0)
72 # if defined (__STDC_VERSION__)
73 # define G_C_STD_VERSION __STDC_VERSION__
75 # define G_C_STD_VERSION 199000L
76 # endif /* defined (__STDC_VERSION__) */
78 # define G_C_STD_CHECK_VERSION(version) ( \
79 ((version) >= 199000L && (version) <= G_C_STD_VERSION) || \
80 ((version) == 89 && G_C_STD_VERSION >= 199000L) || \
81 ((version) == 90 && G_C_STD_VERSION >= 199000L) || \
82 ((version) == 99 && G_C_STD_VERSION >= 199901L) || \
83 ((version) == 11 && G_C_STD_VERSION >= 201112L) || \
84 ((version) == 17 && G_C_STD_VERSION >= 201710L) || \
87 #else /* defined (__cplusplus) */
89 # undef G_C_STD_VERSION
90 # define G_C_STD_CHECK_VERSION(version) (0)
92 # if defined (_MSVC_LANG)
93 # define G_CXX_STD_VERSION (_MSVC_LANG > __cplusplus ? _MSVC_LANG : __cplusplus)
95 # define G_CXX_STD_VERSION __cplusplus
96 # endif /* defined(_MSVC_LANG) */
98 # define G_CXX_STD_CHECK_VERSION(version) ( \
99 ((version) >= 199711L && (version) <= G_CXX_STD_VERSION) || \
100 ((version) == 98 && G_CXX_STD_VERSION >= 199711L) || \
101 ((version) == 03 && G_CXX_STD_VERSION >= 199711L) || \
102 ((version) == 11 && G_CXX_STD_VERSION >= 201103L) || \
103 ((version) == 14 && G_CXX_STD_VERSION >= 201402L) || \
104 ((version) == 17 && G_CXX_STD_VERSION >= 201703L) || \
105 ((version) == 20 && G_CXX_STD_VERSION >= 202002L) || \
108 #endif /* !defined (__cplusplus) */
110 /* Every compiler that we target supports inlining, but some of them may
111 * complain about it if we don't say "__inline". If we have C99, or if
112 * we are using C++, then we can use "inline" directly.
113 * Otherwise, we say "__inline" to avoid the warning.
114 * Unfortunately Visual Studio does not define __STDC_VERSION__ (if not
115 * using /std:cXX) so we need to check whether we are on Visual Studio 2013
116 * or earlier to see whether we need to say "__inline" in C mode.
119 #ifdef G_C_STD_VERSION
121 # if (_MSC_VER < 1900)
122 # define G_INLINE_DEFINE_NEEDED
124 # elif !G_C_STD_CHECK_VERSION (99)
125 # define G_INLINE_DEFINE_NEEDED
129 #ifdef G_INLINE_DEFINE_NEEDED
131 # define inline __inline
134 #undef G_INLINE_DEFINE_NEEDED
139 * This macro used to be used to conditionally define inline functions
140 * in a compatible way before this feature was supported in all
141 * compilers. These days, GLib requires inlining support from the
142 * compiler, so your GLib-using programs can safely assume that the
143 * "inline" keyword works properly.
145 * Never use this macro anymore. Just say "static inline".
147 * Deprecated: 2.48: Use "static inline" instead
150 /* For historical reasons we need to continue to support those who
151 * define G_IMPLEMENT_INLINES to mean "don't implement this here".
153 #ifdef G_IMPLEMENT_INLINES
154 # define G_INLINE_FUNC extern GLIB_DEPRECATED_MACRO_IN_2_48_FOR(static inline)
157 # define G_INLINE_FUNC static inline GLIB_DEPRECATED_MACRO_IN_2_48_FOR(static inline)
158 #endif /* G_IMPLEMENT_INLINES */
161 * Attribute support detection. Works on clang and GCC >= 5
162 * https://clang.llvm.org/docs/LanguageExtensions.html#has-attribute
163 * https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005fattribute.html
166 #ifdef __has_attribute
167 #define g_macro__has_attribute __has_attribute
171 * Fallback for GCC < 5 and other compilers not supporting __has_attribute.
173 #define g_macro__has_attribute(x) g_macro__has_attribute_##x
175 #define g_macro__has_attribute___alloc_size__ G_GNUC_CHECK_VERSION (4, 3)
176 #define g_macro__has_attribute___always_inline__ G_GNUC_CHECK_VERSION (2, 0)
177 #define g_macro__has_attribute___const__ G_GNUC_CHECK_VERSION (2, 4)
178 #define g_macro__has_attribute___deprecated__ G_GNUC_CHECK_VERSION (3, 1)
179 #define g_macro__has_attribute___format__ G_GNUC_CHECK_VERSION (2, 4)
180 #define g_macro__has_attribute___format_arg__ G_GNUC_CHECK_VERSION (2, 4)
181 #define g_macro__has_attribute___malloc__ G_GNUC_CHECK_VERSION (2, 96)
182 #define g_macro__has_attribute___no_instrument_function__ G_GNUC_CHECK_VERSION (2, 4)
183 #define g_macro__has_attribute___noinline__ G_GNUC_CHECK_VERSION (2, 96)
184 #define g_macro__has_attribute___noreturn__ (G_GNUC_CHECK_VERSION (2, 8) || (0x5110 <= __SUNPRO_C))
185 #define g_macro__has_attribute___pure__ G_GNUC_CHECK_VERSION (2, 96)
186 #define g_macro__has_attribute___sentinel__ G_GNUC_CHECK_VERSION (4, 0)
187 #define g_macro__has_attribute___unused__ G_GNUC_CHECK_VERSION (2, 4)
188 #define g_macro__has_attribute_cleanup G_GNUC_CHECK_VERSION (3, 3)
189 #define g_macro__has_attribute_fallthrough G_GNUC_CHECK_VERSION (6, 0)
190 #define g_macro__has_attribute_may_alias G_GNUC_CHECK_VERSION (3, 3)
191 #define g_macro__has_attribute_warn_unused_result G_GNUC_CHECK_VERSION (3, 4)
195 /* Provide macros to feature the GCC function attribute.
201 * Expands to the GNU C `pure` function attribute if the compiler is gcc.
202 * Declaring a function as `pure` enables better optimization of calls to
203 * the function. A `pure` function has no effects except its return value
204 * and the return value depends only on the parameters and/or global
207 * Place the attribute after the declaration, just before the semicolon.
209 * |[<!-- language="C" -->
210 * gboolean g_type_check_value (const GValue *value) G_GNUC_PURE;
213 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute) for more details.
220 * [GNU C `malloc` function attribute](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-functions-that-behave-like-malloc)
221 * if the compiler is gcc.
222 * Declaring a function as `malloc` enables better optimization of the function,
223 * but must only be done if the allocation behaviour of the function is fully
224 * understood, otherwise miscompilation can result.
226 * A function can have the `malloc` attribute if it returns a pointer which is
227 * guaranteed to not alias with any other pointer valid when the function
228 * returns, and moreover no pointers to valid objects occur in any storage
229 * addressed by the returned pointer.
231 * In practice, this means that `G_GNUC_MALLOC` can be used with any function
232 * which returns unallocated or zeroed-out memory, but not with functions which
233 * return initialised structures containing other pointers, or with functions
234 * that reallocate memory. This definition changed in GLib 2.58 to match the
235 * stricter definition introduced around GCC 5.
237 * Place the attribute after the declaration, just before the semicolon.
239 * |[<!-- language="C" -->
240 * gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
244 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-functions-that-behave-like-malloc)
253 * Expands to the GNU C `noinline` function attribute if the compiler is gcc.
254 * If the compiler is not gcc, this macro expands to nothing.
256 * Declaring a function as `noinline` prevents the function from being
257 * considered for inlining.
259 * This macro is provided for retro-compatibility and will be eventually
260 * deprecated, but %G_NO_INLINE should be used instead.
262 * The attribute may be placed before the declaration or definition,
263 * right before the `static` keyword.
265 * |[<!-- language="C" -->
268 * do_not_inline_this (void)
275 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute)
278 * See also: %G_NO_INLINE, %G_ALWAYS_INLINE.
283 #if g_macro__has_attribute(__pure__)
284 #define G_GNUC_PURE __attribute__((__pure__))
289 #if g_macro__has_attribute(__malloc__)
290 #define G_GNUC_MALLOC __attribute__ ((__malloc__))
292 #define G_GNUC_MALLOC
295 #if g_macro__has_attribute(__noinline__)
296 #define G_GNUC_NO_INLINE __attribute__ ((__noinline__)) \
297 GLIB_AVAILABLE_MACRO_IN_2_58
299 #define G_GNUC_NO_INLINE \
300 GLIB_AVAILABLE_MACRO_IN_2_58
304 * G_GNUC_NULL_TERMINATED:
306 * Expands to the GNU C `sentinel` function attribute if the compiler is gcc.
307 * This function attribute only applies to variadic functions and instructs
308 * the compiler to check that the argument list is terminated with an
311 * Place the attribute after the declaration, just before the semicolon.
313 * |[<!-- language="C" -->
314 * gchar *g_strconcat (const gchar *string1,
315 * ...) G_GNUC_NULL_TERMINATED;
318 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-sentinel-function-attribute) for more details.
322 #if g_macro__has_attribute(__sentinel__)
323 #define G_GNUC_NULL_TERMINATED __attribute__((__sentinel__))
325 #define G_GNUC_NULL_TERMINATED
329 * Clang feature detection: http://clang.llvm.org/docs/LanguageExtensions.html
330 * These are not available on GCC, but since the pre-processor doesn't do
331 * operator short-circuiting, we can't use it in a statement or we'll get:
333 * error: missing binary operator before token "("
335 * So we define it to 0 to satisfy the pre-processor.
339 #define g_macro__has_feature __has_feature
341 #define g_macro__has_feature(x) 0
345 #define g_macro__has_builtin __has_builtin
347 #define g_macro__has_builtin(x) 0
350 #ifdef __has_extension
351 #define g_macro__has_extension __has_extension
353 #define g_macro__has_extension(x) 0
358 * @x: the index of the argument specifying the allocation size
360 * Expands to the GNU C `alloc_size` function attribute if the compiler
361 * is a new enough gcc. This attribute tells the compiler that the
362 * function returns a pointer to memory of a size that is specified
363 * by the @xth function parameter.
365 * Place the attribute after the function declaration, just before the
368 * |[<!-- language="C" -->
369 * gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1);
372 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alloc_005fsize-function-attribute) for more details.
378 * G_GNUC_ALLOC_SIZE2:
379 * @x: the index of the argument specifying one factor of the allocation size
380 * @y: the index of the argument specifying the second factor of the allocation size
382 * Expands to the GNU C `alloc_size` function attribute if the compiler is a
383 * new enough gcc. This attribute tells the compiler that the function returns
384 * a pointer to memory of a size that is specified by the product of two
385 * function parameters.
387 * Place the attribute after the function declaration, just before the
390 * |[<!-- language="C" -->
391 * gpointer g_malloc_n (gsize n_blocks,
392 * gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1, 2);
395 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alloc_005fsize-function-attribute) for more details.
399 #if g_macro__has_attribute(__alloc_size__)
400 #define G_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
401 #define G_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y)))
403 #define G_GNUC_ALLOC_SIZE(x)
404 #define G_GNUC_ALLOC_SIZE2(x,y)
409 * @format_idx: the index of the argument corresponding to the
410 * format string (the arguments are numbered from 1)
411 * @arg_idx: the index of the first of the format arguments, or 0 if
412 * there are no format arguments
414 * Expands to the GNU C `format` function attribute if the compiler is gcc.
415 * This is used for declaring functions which take a variable number of
416 * arguments, with the same syntax as `printf()`. It allows the compiler
417 * to type-check the arguments passed to the function.
419 * Place the attribute after the function declaration, just before the
423 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288)
426 * |[<!-- language="C" -->
427 * gint g_snprintf (gchar *string,
429 * gchar const *format,
430 * ...) G_GNUC_PRINTF (3, 4);
436 * @format_idx: the index of the argument corresponding to
437 * the format string (the arguments are numbered from 1)
438 * @arg_idx: the index of the first of the format arguments, or 0 if
439 * there are no format arguments
441 * Expands to the GNU C `format` function attribute if the compiler is gcc.
442 * This is used for declaring functions which take a variable number of
443 * arguments, with the same syntax as `scanf()`. It allows the compiler
444 * to type-check the arguments passed to the function.
446 * |[<!-- language="C" -->
447 * int my_scanf (MyStream *stream,
448 * const char *format,
449 * ...) G_GNUC_SCANF (2, 3);
450 * int my_vscanf (MyStream *stream,
451 * const char *format,
452 * va_list ap) G_GNUC_SCANF (2, 0);
456 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288)
462 * @format_idx: the index of the argument corresponding to
463 * the format string (the arguments are numbered from 1)
465 * Expands to the GNU C `strftime` format function attribute if the compiler
466 * is gcc. This is used for declaring functions which take a format argument
467 * which is passed to `strftime()` or an API implementing its formats. It allows
468 * the compiler check the format passed to the function.
470 * |[<!-- language="C" -->
471 * gsize my_strftime (MyBuffer *buffer,
472 * const char *format,
473 * const struct tm *tm) G_GNUC_STRFTIME (2);
477 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288)
485 * @arg_idx: the index of the argument
487 * Expands to the GNU C `format_arg` function attribute if the compiler
488 * is gcc. This function attribute specifies that a function takes a
489 * format string for a `printf()`, `scanf()`, `strftime()` or `strfmon()` style
490 * function and modifies it, so that the result can be passed to a `printf()`,
491 * `scanf()`, `strftime()` or `strfmon()` style function (with the remaining
492 * arguments to the format function the same as they would have been
493 * for the unmodified string).
495 * Place the attribute after the function declaration, just before the
498 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-nonliteral-1) for more details.
500 * |[<!-- language="C" -->
501 * gchar *g_dgettext (gchar *domain_name, gchar *msgid) G_GNUC_FORMAT (2);
508 * Expands to the GNU C `noreturn` function attribute if the compiler is gcc.
509 * It is used for declaring functions which never return. It enables
510 * optimization of the function, and avoids possible compiler warnings.
512 * Since 2.68, it is recommended that code uses %G_NORETURN instead of
513 * %G_GNUC_NORETURN, as that works on more platforms and compilers (in
514 * particular, MSVC and C++11) than %G_GNUC_NORETURN, which works with GCC and
515 * Clang only. %G_GNUC_NORETURN continues to work, so has not been deprecated
518 * Place the attribute after the declaration, just before the semicolon.
520 * |[<!-- language="C" -->
521 * void g_abort (void) G_GNUC_NORETURN;
524 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noreturn-function-attribute) for more details.
530 * Expands to the GNU C `const` function attribute if the compiler is gcc.
531 * Declaring a function as `const` enables better optimization of calls to
532 * the function. A `const` function doesn't examine any values except its
533 * parameters, and has no effects except its return value.
535 * Place the attribute after the declaration, just before the semicolon.
537 * |[<!-- language="C" -->
538 * gchar g_ascii_tolower (gchar c) G_GNUC_CONST;
541 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute) for more details.
543 * A function that has pointer arguments and examines the data pointed to
544 * must not be declared `const`. Likewise, a function that calls a non-`const`
545 * function usually must not be `const`. It doesn't make sense for a `const`
546 * function to return `void`.
552 * Expands to the GNU C `unused` function attribute if the compiler is gcc.
553 * It is used for declaring functions and arguments which may never be used.
554 * It avoids possible compiler warnings.
556 * For functions, place the attribute after the declaration, just before the
557 * semicolon. For arguments, place the attribute at the beginning of the
558 * argument declaration.
560 * |[<!-- language="C" -->
561 * void my_unused_function (G_GNUC_UNUSED gint unused_argument,
562 * gint other_argument) G_GNUC_UNUSED;
565 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute) for more details.
569 * G_GNUC_NO_INSTRUMENT:
571 * Expands to the GNU C `no_instrument_function` function attribute if the
572 * compiler is gcc. Functions with this attribute will not be instrumented
573 * for profiling, when the compiler is called with the
574 * `-finstrument-functions` option.
576 * Place the attribute after the declaration, just before the semicolon.
578 * |[<!-- language="C" -->
579 * int do_uninteresting_things (void) G_GNUC_NO_INSTRUMENT;
582 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-no_005finstrument_005ffunction-function-attribute) for more details.
585 #if g_macro__has_attribute(__format__)
587 #if !defined (__clang__) && G_GNUC_CHECK_VERSION (4, 4)
588 #define G_GNUC_PRINTF( format_idx, arg_idx ) \
589 __attribute__((__format__ (gnu_printf, format_idx, arg_idx)))
590 #define G_GNUC_SCANF( format_idx, arg_idx ) \
591 __attribute__((__format__ (gnu_scanf, format_idx, arg_idx)))
592 #define G_GNUC_STRFTIME( format_idx ) \
593 __attribute__((__format__ (gnu_strftime, format_idx, 0))) \
594 GLIB_AVAILABLE_MACRO_IN_2_60
596 #define G_GNUC_PRINTF( format_idx, arg_idx ) \
597 __attribute__((__format__ (__printf__, format_idx, arg_idx)))
598 #define G_GNUC_SCANF( format_idx, arg_idx ) \
599 __attribute__((__format__ (__scanf__, format_idx, arg_idx)))
600 #define G_GNUC_STRFTIME( format_idx ) \
601 __attribute__((__format__ (__strftime__, format_idx, 0))) \
602 GLIB_AVAILABLE_MACRO_IN_2_60
607 #define G_GNUC_PRINTF( format_idx, arg_idx )
608 #define G_GNUC_SCANF( format_idx, arg_idx )
609 #define G_GNUC_STRFTIME( format_idx ) \
610 GLIB_AVAILABLE_MACRO_IN_2_60
614 #if g_macro__has_attribute(__format_arg__)
615 #define G_GNUC_FORMAT(arg_idx) \
616 __attribute__ ((__format_arg__ (arg_idx)))
618 #define G_GNUC_FORMAT( arg_idx )
621 #if g_macro__has_attribute(__noreturn__)
622 #define G_GNUC_NORETURN \
623 __attribute__ ((__noreturn__))
625 /* NOTE: MSVC has __declspec(noreturn) but unlike GCC __attribute__,
626 * __declspec can only be placed at the start of the function prototype
627 * and not at the end, so we can't use it without breaking API.
629 #define G_GNUC_NORETURN
632 #if g_macro__has_attribute(__const__)
633 #define G_GNUC_CONST \
634 __attribute__ ((__const__))
639 #if g_macro__has_attribute(__unused__)
640 #define G_GNUC_UNUSED \
641 __attribute__ ((__unused__))
643 #define G_GNUC_UNUSED
646 #if g_macro__has_attribute(__no_instrument_function__)
647 #define G_GNUC_NO_INSTRUMENT \
648 __attribute__ ((__no_instrument_function__))
650 #define G_GNUC_NO_INSTRUMENT
654 * G_GNUC_FALLTHROUGH:
656 * Expands to the GNU C `fallthrough` statement attribute if the compiler supports it.
657 * This allows declaring case statement to explicitly fall through in switch
658 * statements. To enable this feature, use `-Wimplicit-fallthrough` during
661 * Put the attribute right before the case statement you want to fall through
664 * |[<!-- language="C" -->
668 * g_message ("it's 1");
669 * G_GNUC_FALLTHROUGH;
671 * g_message ("it's either 1 or 2");
677 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#index-fallthrough-statement-attribute) for more details.
681 #if g_macro__has_attribute(fallthrough)
682 #define G_GNUC_FALLTHROUGH __attribute__((fallthrough)) \
683 GLIB_AVAILABLE_MACRO_IN_2_60
685 #define G_GNUC_FALLTHROUGH \
686 GLIB_AVAILABLE_MACRO_IN_2_60
692 * Expands to the GNU C `deprecated` attribute if the compiler is gcc.
693 * It can be used to mark `typedef`s, variables and functions as deprecated.
694 * When called with the `-Wdeprecated-declarations` option,
695 * gcc will generate warnings when deprecated interfaces are used.
697 * Place the attribute after the declaration, just before the semicolon.
699 * |[<!-- language="C" -->
700 * int my_mistake (void) G_GNUC_DEPRECATED;
703 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute) for more details.
707 #if g_macro__has_attribute(__deprecated__)
708 #define G_GNUC_DEPRECATED __attribute__((__deprecated__))
710 #define G_GNUC_DEPRECATED
711 #endif /* __GNUC__ */
714 * G_GNUC_DEPRECATED_FOR:
715 * @f: the intended replacement for the deprecated symbol,
716 * such as the name of a function
718 * Like %G_GNUC_DEPRECATED, but names the intended replacement for the
719 * deprecated symbol if the version of gcc in use is new enough to support
720 * custom deprecation messages.
722 * Place the attribute after the declaration, just before the semicolon.
724 * |[<!-- language="C" -->
725 * int my_mistake (void) G_GNUC_DEPRECATED_FOR(my_replacement);
728 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute) for more details.
730 * Note that if @f is a macro, it will be expanded in the warning message.
731 * You can enclose it in quotes to prevent this. (The quotes will show up
732 * in the warning, but it's better than showing the macro expansion.)
736 #if G_GNUC_CHECK_VERSION(4, 5) || defined(__clang__)
737 #define G_GNUC_DEPRECATED_FOR(f) \
738 __attribute__((deprecated("Use " #f " instead"))) \
739 GLIB_AVAILABLE_MACRO_IN_2_26
741 #define G_GNUC_DEPRECATED_FOR(f) G_GNUC_DEPRECATED \
742 GLIB_AVAILABLE_MACRO_IN_2_26
743 #endif /* __GNUC__ */
746 #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
747 _Pragma ("warning (push)") \
748 _Pragma ("warning (disable:1478)")
749 #define G_GNUC_END_IGNORE_DEPRECATIONS \
750 _Pragma ("warning (pop)")
751 #elif G_GNUC_CHECK_VERSION(4, 6)
752 #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
753 _Pragma ("GCC diagnostic push") \
754 _Pragma ("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
755 #define G_GNUC_END_IGNORE_DEPRECATIONS \
756 _Pragma ("GCC diagnostic pop")
757 #elif defined (_MSC_VER) && (_MSC_VER >= 1500) && !defined (__clang__)
758 #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
759 __pragma (warning (push)) \
760 __pragma (warning (disable : 4996))
761 #define G_GNUC_END_IGNORE_DEPRECATIONS \
762 __pragma (warning (pop))
763 #elif defined (__clang__)
764 #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
765 _Pragma("clang diagnostic push") \
766 _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"")
767 #define G_GNUC_END_IGNORE_DEPRECATIONS \
768 _Pragma("clang diagnostic pop")
770 #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS
771 #define G_GNUC_END_IGNORE_DEPRECATIONS
772 #define GLIB_CANNOT_IGNORE_DEPRECATIONS
778 * Expands to the GNU C `may_alias` type attribute if the compiler is gcc.
779 * Types with this attribute will not be subjected to type-based alias
780 * analysis, but are assumed to alias with any other type, just like `char`.
782 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-may_005falias-type-attribute) for details.
786 #if g_macro__has_attribute(may_alias)
787 #define G_GNUC_MAY_ALIAS __attribute__((may_alias))
789 #define G_GNUC_MAY_ALIAS
793 * G_GNUC_WARN_UNUSED_RESULT:
795 * Expands to the GNU C `warn_unused_result` function attribute if the compiler
796 * is gcc. This function attribute makes the compiler emit a warning if the
797 * result of a function call is ignored.
799 * Place the attribute after the declaration, just before the semicolon.
801 * |[<!-- language="C" -->
802 * GList *g_list_append (GList *list,
803 * gpointer data) G_GNUC_WARN_UNUSED_RESULT;
806 * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-warn_005funused_005fresult-function-attribute) for more details.
810 #if g_macro__has_attribute(warn_unused_result)
811 #define G_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
813 #define G_GNUC_WARN_UNUSED_RESULT
814 #endif /* __GNUC__ */
819 * Expands to "" on all modern compilers, and to __FUNCTION__ on gcc
820 * version 2.x. Don't use it.
822 * Deprecated: 2.16: Use G_STRFUNC() instead
826 * G_GNUC_PRETTY_FUNCTION:
828 * Expands to "" on all modern compilers, and to __PRETTY_FUNCTION__
829 * on gcc version 2.x. Don't use it.
831 * Deprecated: 2.16: Use G_STRFUNC() instead
834 /* Wrap the gcc __PRETTY_FUNCTION__ and __FUNCTION__ variables with
835 * macros, so we can refer to them as strings unconditionally.
836 * usage not-recommended since gcc-3.0
838 * Mark them as deprecated since 2.26, since that’s when version macros were
841 #if defined (__GNUC__) && (__GNUC__ < 3)
842 #define G_GNUC_FUNCTION __FUNCTION__ GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC)
843 #define G_GNUC_PRETTY_FUNCTION __PRETTY_FUNCTION__ GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC)
844 #else /* !__GNUC__ */
845 #define G_GNUC_FUNCTION "" GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC)
846 #define G_GNUC_PRETTY_FUNCTION "" GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC)
847 #endif /* !__GNUC__ */
849 #if g_macro__has_feature(attribute_analyzer_noreturn) && defined(__clang_analyzer__)
850 #define G_ANALYZER_ANALYZING 1
851 #define G_ANALYZER_NORETURN __attribute__((analyzer_noreturn))
852 #elif defined(__COVERITY__)
853 #define G_ANALYZER_ANALYZING 1
854 #define G_ANALYZER_NORETURN __attribute__((noreturn))
856 #define G_ANALYZER_ANALYZING 0
857 #define G_ANALYZER_NORETURN
860 #define G_STRINGIFY(macro_or_string) G_STRINGIFY_ARG (macro_or_string)
861 #define G_STRINGIFY_ARG(contents) #contents
863 #ifndef __GI_SCANNER__ /* The static assert macro really confuses the introspection parser */
864 #define G_PASTE_ARGS(identifier1,identifier2) identifier1 ## identifier2
865 #define G_PASTE(identifier1,identifier2) G_PASTE_ARGS (identifier1, identifier2)
866 #if G_CXX_STD_CHECK_VERSION (11)
867 #define G_STATIC_ASSERT(expr) static_assert (expr, "Expression evaluates to false")
868 #elif (G_C_STD_CHECK_VERSION (11) || \
869 g_macro__has_feature(c_static_assert) || g_macro__has_extension(c_static_assert))
870 #define G_STATIC_ASSERT(expr) _Static_assert (expr, "Expression evaluates to false")
873 #define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __COUNTER__)[(expr) ? 1 : -1] G_GNUC_UNUSED
875 #define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __LINE__)[(expr) ? 1 : -1] G_GNUC_UNUSED
877 #endif /* G_CXX_STD_CHECK_VERSION (11) */
878 #define G_STATIC_ASSERT_EXPR(expr) ((void) sizeof (char[(expr) ? 1 : -1]))
879 #endif /* !__GI_SCANNER__ */
881 /* Provide a string identifying the current code position */
882 #if defined (__GNUC__) && (__GNUC__ < 3) && !defined (G_CXX_STD_VERSION)
883 #define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__) ":" __PRETTY_FUNCTION__ "()"
885 #define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__)
888 /* Provide a string identifying the current function, non-concatenatable */
889 #if defined (__GNUC__) && defined (G_CXX_STD_VERSION)
890 #define G_STRFUNC ((const char*) (__PRETTY_FUNCTION__))
891 #elif G_C_STD_CHECK_VERSION (99)
892 #define G_STRFUNC ((const char*) (__func__))
893 #elif defined (__GNUC__) || (defined(_MSC_VER) && (_MSC_VER > 1300))
894 #define G_STRFUNC ((const char*) (__FUNCTION__))
896 #define G_STRFUNC ((const char*) ("???"))
899 /* Guard C code in headers, while including them from C++ */
900 #ifdef G_CXX_STD_VERSION
901 #define G_BEGIN_DECLS extern "C" {
902 #define G_END_DECLS }
904 #define G_BEGIN_DECLS
908 /* Provide definitions for some commonly used macros.
909 * Some of them are only provided if they haven't already
910 * been defined. It is assumed that if they are already
911 * defined then the current definition is correct.
914 # if G_CXX_STD_CHECK_VERSION (11)
915 # define NULL (nullptr)
916 # elif defined (G_CXX_STD_VERSION)
919 # define NULL ((void*) 0)
920 # endif /* G_CXX_STD_CHECK_VERSION (11) */
928 #define TRUE (!FALSE)
932 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
935 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
938 #define ABS(a) (((a) < 0) ? -(a) : (a))
941 #define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
943 #define G_APPROX_VALUE(a, b, epsilon) \
944 (((a) > (b) ? (a) - (b) : (b) - (a)) < (epsilon))
946 /* Count the number of elements in an array. The array must be defined
947 * as such; using this with a dynamically allocated array will give
950 #define G_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
952 /* Macros by analogy to GINT_TO_POINTER, GPOINTER_TO_INT
954 #define GPOINTER_TO_SIZE(p) ((gsize) (p))
955 #define GSIZE_TO_POINTER(s) ((gpointer) (guintptr) (gsize) (s))
957 /* Provide convenience macros for handling structure
958 * fields through their offsets.
961 #if G_GNUC_CHECK_VERSION(4, 0) || defined(_MSC_VER)
962 #define G_STRUCT_OFFSET(struct_type, member) \
963 ((glong) offsetof (struct_type, member))
965 #define G_STRUCT_OFFSET(struct_type, member) \
966 ((glong) ((guint8*) &((struct_type*) 0)->member))
969 #define G_STRUCT_MEMBER_P(struct_p, struct_offset) \
970 ((gpointer) ((guint8*) (struct_p) + (glong) (struct_offset)))
971 #define G_STRUCT_MEMBER(member_type, struct_p, struct_offset) \
972 (*(member_type*) G_STRUCT_MEMBER_P ((struct_p), (struct_offset)))
974 /* Provide simple macro statement wrappers:
975 * G_STMT_START { statements; } G_STMT_END;
976 * This can be used as a single statement, like:
977 * if (x) G_STMT_START { ... } G_STMT_END; else ...
978 * This intentionally does not use compiler extensions like GCC's '({...})' to
979 * avoid portability issue or side effects when compiled with different compilers.
980 * MSVC complains about "while(0)": C4127: "Conditional expression is constant",
981 * so we use __pragma to avoid the warning since the use here is intentional.
983 #if !(defined (G_STMT_START) && defined (G_STMT_END))
984 #define G_STMT_START do
985 #if defined (_MSC_VER) && (_MSC_VER >= 1500)
987 __pragma(warning(push)) \
988 __pragma(warning(disable:4127)) \
990 __pragma(warning(pop))
992 #define G_STMT_END while (0)
996 /* Provide G_ALIGNOF alignment macro.
998 * Note we cannot use the gcc __alignof__ operator here, as that returns the
999 * preferred alignment rather than the minimal alignment. See
1000 * https://gitlab.gnome.org/GNOME/glib/merge_requests/538/diffs#note_390790.
1005 * @type: a type-name
1007 * Return the minimal alignment required by the platform ABI for values of the given
1008 * type. The address of a variable or struct member of the given type must always be
1009 * a multiple of this alignment. For example, most platforms require int variables
1010 * to be aligned at a 4-byte boundary, so `G_ALIGNOF (int)` is 4 on most platforms.
1012 * Note this is not necessarily the same as the value returned by GCC’s
1013 * `__alignof__` operator, which returns the preferred alignment for a type.
1014 * The preferred alignment may be a stricter alignment than the minimal
1019 #if G_C_STD_CHECK_VERSION (11)
1020 #define G_ALIGNOF(type) _Alignof (type) \
1021 GLIB_AVAILABLE_MACRO_IN_2_60
1023 #define G_ALIGNOF(type) (G_STRUCT_OFFSET (struct { char a; type b; }, b)) \
1024 GLIB_AVAILABLE_MACRO_IN_2_60
1030 * If %G_DISABLE_CONST_RETURNS is defined, this macro expands
1031 * to nothing. By default, the macro expands to const. The macro
1032 * can be used in place of const for functions that return a value
1033 * that should not be modified. The purpose of this macro is to allow
1034 * us to turn on const for returned constant strings by default, while
1035 * allowing programmers who find that annoying to turn it off. This macro
1036 * should only be used for return values and for "out" parameters, it
1037 * doesn't make sense for "in" parameters.
1039 * Deprecated: 2.30: API providers should replace all existing uses with
1040 * const and API consumers should adjust their code accordingly
1042 #ifdef G_DISABLE_CONST_RETURNS
1043 #define G_CONST_RETURN GLIB_DEPRECATED_MACRO_IN_2_30_FOR(const)
1045 #define G_CONST_RETURN const GLIB_DEPRECATED_MACRO_IN_2_30_FOR(const)
1051 * Expands to the GNU C or MSVC `noreturn` function attribute depending on
1052 * the compiler. It is used for declaring functions which never return.
1053 * Enables optimization of the function, and avoids possible compiler warnings.
1055 * Note that %G_NORETURN supersedes the previous %G_GNUC_NORETURN macro, which
1056 * will eventually be deprecated. %G_NORETURN supports more platforms.
1058 * Place the attribute before the function declaration as follows:
1060 * |[<!-- language="C" -->
1061 * G_NORETURN void g_abort (void);
1066 /* Note: We can’t annotate this with GLIB_AVAILABLE_MACRO_IN_2_68 because it’s
1067 * used within the GLib headers in function declarations which are always
1068 * evaluated when a header is included. This results in warnings in third party
1069 * code which includes glib.h, even if the third party code doesn’t use the new
1071 #if G_CXX_STD_CHECK_VERSION (11)
1072 /* Use ISO C++11 syntax when the compiler supports it. */
1073 # define G_NORETURN [[noreturn]]
1074 #elif g_macro__has_attribute(__noreturn__)
1075 /* For compatibility with G_NORETURN_FUNCPTR on clang, use
1076 __attribute__((__noreturn__)), not _Noreturn. */
1077 # define G_NORETURN __attribute__ ((__noreturn__))
1078 #elif defined (_MSC_VER) && (1200 <= _MSC_VER)
1079 /* Use MSVC specific syntax. */
1080 # define G_NORETURN __declspec (noreturn)
1081 /* Use ISO C11 syntax when the compiler supports it. */
1082 #elif G_C_STD_CHECK_VERSION (11)
1083 # define G_NORETURN _Noreturn
1085 # define G_NORETURN /* empty */
1089 * G_NORETURN_FUNCPTR:
1091 * Expands to the GNU C or MSVC `noreturn` function attribute depending on
1092 * the compiler. It is used for declaring function pointers which never return.
1093 * Enables optimization of the function, and avoids possible compiler warnings.
1095 * Place the attribute before the function declaration as follows:
1097 * |[<!-- language="C" -->
1098 * G_NORETURN_FUNCPTR void (*funcptr) (void);
1101 * Note that if the function is not a function pointer, you can simply use
1102 * the %G_NORETURN macro as follows:
1104 * |[<!-- language="C" -->
1105 * G_NORETURN void g_abort (void);
1110 #if g_macro__has_attribute(__noreturn__)
1111 # define G_NORETURN_FUNCPTR __attribute__ ((__noreturn__)) \
1112 GLIB_AVAILABLE_MACRO_IN_2_68
1114 # define G_NORETURN_FUNCPTR /* empty */ \
1115 GLIB_AVAILABLE_MACRO_IN_2_68
1121 * Expands to the GNU C `always_inline` or MSVC `__forceinline` function
1122 * attribute depending on the compiler. It is used for declaring functions
1123 * as always inlined, ignoring the compiler optimization levels.
1125 * The attribute may be placed before the declaration or definition,
1126 * right before the `static` keyword.
1128 * |[<!-- language="C" -->
1131 * do_inline_this (void)
1138 * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-always_005finline-function-attribute)
1140 * [MSVC documentation](https://docs.microsoft.com/en-us/visualstudio/misc/inline-inline-forceinline)
1144 /* Note: We can’t annotate this with GLIB_AVAILABLE_MACRO_IN_2_74 because it’s
1145 * used within the GLib headers in function declarations which are always
1146 * evaluated when a header is included. This results in warnings in third party
1147 * code which includes glib.h, even if the third party code doesn’t use the new
1149 #if g_macro__has_attribute(__always_inline__)
1150 # if G_CXX_STD_CHECK_VERSION (11)
1151 /* Use ISO C++11 syntax when the compiler supports it. */
1152 # define G_ALWAYS_INLINE [[gnu::always_inline]]
1154 # define G_ALWAYS_INLINE __attribute__ ((__always_inline__))
1156 #elif defined (_MSC_VER)
1157 /* Use MSVC specific syntax. */
1158 # if G_CXX_STD_CHECK_VERSION (20) && _MSC_VER >= 1927
1159 # define G_ALWAYS_INLINE [[msvc::forceinline]]
1161 # define G_ALWAYS_INLINE __forceinline
1164 # define G_ALWAYS_INLINE /* empty */
1170 * Expands to the GNU C or MSVC `noinline` function attribute
1171 * depending on the compiler. It is used for declaring functions
1172 * preventing from being considered for inlining.
1174 * Note that %G_NO_INLINE supersedes the previous %G_GNUC_NO_INLINE
1175 * macro, which will eventually be deprecated.
1176 * %G_NO_INLINE supports more platforms.
1178 * The attribute may be placed before the declaration or definition,
1179 * right before the `static` keyword.
1181 * |[<!-- language="C" -->
1184 * do_not_inline_this (void)
1192 /* Note: We can’t annotate this with GLIB_AVAILABLE_MACRO_IN_2_74 because it’s
1193 * used within the GLib headers in function declarations which are always
1194 * evaluated when a header is included. This results in warnings in third party
1195 * code which includes glib.h, even if the third party code doesn’t use the new
1197 #if g_macro__has_attribute(__noinline__)
1198 # if G_CXX_STD_CHECK_VERSION (11)
1199 /* Use ISO C++11 syntax when the compiler supports it. */
1200 # if defined (__GNUC__)
1201 # define G_NO_INLINE [[gnu::noinline]]
1202 # elif defined (_MSC_VER)
1203 # if G_CXX_STD_CHECK_VERSION (20) && _MSC_VER >= 1927
1204 # define G_NO_INLINE [[msvc::noinline]]
1206 # define G_NO_INLINE __declspec (noinline)
1210 # define G_NO_INLINE __attribute__ ((__noinline__))
1212 #elif defined (_MSC_VER) && (1200 <= _MSC_VER)
1213 /* Use MSVC specific syntax. */
1214 /* Use ISO C++11 syntax when the compiler supports it. */
1215 # if G_CXX_STD_CHECK_VERSION (20) && _MSC_VER >= 1927
1216 # define G_NO_INLINE [[msvc::noinline]]
1218 # define G_NO_INLINE __declspec (noinline)
1221 # define G_NO_INLINE /* empty */
1225 * The G_LIKELY and G_UNLIKELY macros let the programmer give hints to
1226 * the compiler about the expected result of an expression. Some compilers
1227 * can use this information for optimizations.
1229 * The _G_BOOLEAN_EXPR macro is intended to trigger a gcc warning when
1230 * putting assignments in g_return_if_fail ().
1232 #if G_GNUC_CHECK_VERSION(2, 0) && defined(__OPTIMIZE__)
1233 #define _G_BOOLEAN_EXPR_IMPL(uniq, expr) \
1234 G_GNUC_EXTENSION ({ \
1235 int G_PASTE (_g_boolean_var_, uniq); \
1237 G_PASTE (_g_boolean_var_, uniq) = 1; \
1239 G_PASTE (_g_boolean_var_, uniq) = 0; \
1240 G_PASTE (_g_boolean_var_, uniq); \
1242 #define _G_BOOLEAN_EXPR(expr) _G_BOOLEAN_EXPR_IMPL (__COUNTER__, expr)
1243 #define G_LIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR(expr), 1))
1244 #define G_UNLIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR(expr), 0))
1246 #define G_LIKELY(expr) (expr)
1247 #define G_UNLIKELY(expr) (expr)
1250 #if __GNUC__ >= 4 && !defined(_WIN32) && !defined(__CYGWIN__)
1251 #define G_HAVE_GNUC_VISIBILITY 1
1254 /* GLIB_CANNOT_IGNORE_DEPRECATIONS is defined above for compilers that do not
1255 * have a way to temporarily suppress deprecation warnings. In these cases,
1256 * suppress the deprecated attribute altogether (otherwise a simple #include
1257 * <glib.h> will emit a barrage of warnings).
1259 #if defined(GLIB_CANNOT_IGNORE_DEPRECATIONS)
1260 #define G_DEPRECATED
1261 #elif G_GNUC_CHECK_VERSION(3, 1) || defined(__clang__)
1262 #define G_DEPRECATED __attribute__((__deprecated__))
1263 #elif defined(_MSC_VER) && (_MSC_VER >= 1300)
1264 #define G_DEPRECATED __declspec(deprecated)
1266 #define G_DEPRECATED
1269 #if defined(GLIB_CANNOT_IGNORE_DEPRECATIONS)
1270 #define G_DEPRECATED_FOR(f) G_DEPRECATED
1271 #elif G_GNUC_CHECK_VERSION(4, 5) || defined(__clang__)
1272 #define G_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead")))
1273 #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
1274 #define G_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead"))
1276 #define G_DEPRECATED_FOR(f) G_DEPRECATED
1279 #if G_GNUC_CHECK_VERSION(4, 5) || defined(__clang__)
1280 #define G_UNAVAILABLE(maj,min) __attribute__((deprecated("Not available before " #maj "." #min)))
1281 #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320)
1282 #define G_UNAVAILABLE(maj,min) __declspec(deprecated("is not available before " #maj "." #min))
1284 #define G_UNAVAILABLE(maj,min) G_DEPRECATED
1287 /* These macros are used to mark deprecated symbols in GLib headers,
1288 * and thus have to be exposed in installed headers. But please
1289 * do *not* use them in other projects. Instead, use G_DEPRECATED
1290 * or define your own wrappers around it.
1293 #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \
1294 (G_GNUC_CHECK_VERSION(4, 6) || \
1295 __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4))
1296 #define _GLIB_GNUC_DO_PRAGMA(x) _Pragma(G_STRINGIFY (x))
1297 #define GLIB_DEPRECATED_MACRO _GLIB_GNUC_DO_PRAGMA(GCC warning "Deprecated pre-processor symbol")
1298 #define GLIB_DEPRECATED_MACRO_FOR(f) \
1299 _GLIB_GNUC_DO_PRAGMA(GCC warning G_STRINGIFY (Deprecated pre-processor symbol: replace with #f))
1300 #define GLIB_UNAVAILABLE_MACRO(maj,min) \
1301 _GLIB_GNUC_DO_PRAGMA(GCC warning G_STRINGIFY (Not available before maj.min))
1303 #define GLIB_DEPRECATED_MACRO
1304 #define GLIB_DEPRECATED_MACRO_FOR(f)
1305 #define GLIB_UNAVAILABLE_MACRO(maj,min)
1308 #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \
1309 (G_GNUC_CHECK_VERSION(6, 1) || \
1310 (defined (__clang_major__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 0))))
1311 #define GLIB_DEPRECATED_ENUMERATOR G_DEPRECATED
1312 #define GLIB_DEPRECATED_ENUMERATOR_FOR(f) G_DEPRECATED_FOR(f)
1313 #define GLIB_UNAVAILABLE_ENUMERATOR(maj,min) G_UNAVAILABLE(maj,min)
1315 #define GLIB_DEPRECATED_ENUMERATOR
1316 #define GLIB_DEPRECATED_ENUMERATOR_FOR(f)
1317 #define GLIB_UNAVAILABLE_ENUMERATOR(maj,min)
1320 #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \
1321 (G_GNUC_CHECK_VERSION(3, 1) || \
1322 (defined (__clang_major__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 0))))
1323 #define GLIB_DEPRECATED_TYPE G_DEPRECATED
1324 #define GLIB_DEPRECATED_TYPE_FOR(f) G_DEPRECATED_FOR(f)
1325 #define GLIB_UNAVAILABLE_TYPE(maj,min) G_UNAVAILABLE(maj,min)
1327 #define GLIB_DEPRECATED_TYPE
1328 #define GLIB_DEPRECATED_TYPE_FOR(f)
1329 #define GLIB_UNAVAILABLE_TYPE(maj,min)
1332 #ifndef __GI_SCANNER__
1334 #if g_macro__has_attribute(cleanup)
1336 /* these macros are private; note that gstdio.h also uses _GLIB_CLEANUP */
1337 #define _GLIB_AUTOPTR_FUNC_NAME(TypeName) glib_autoptr_cleanup_##TypeName
1338 #define _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) glib_autoptr_clear_##TypeName
1339 #define _GLIB_AUTOPTR_TYPENAME(TypeName) TypeName##_autoptr
1340 #define _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) glib_listautoptr_cleanup_##TypeName
1341 #define _GLIB_AUTOPTR_LIST_TYPENAME(TypeName) TypeName##_listautoptr
1342 #define _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) glib_slistautoptr_cleanup_##TypeName
1343 #define _GLIB_AUTOPTR_SLIST_TYPENAME(TypeName) TypeName##_slistautoptr
1344 #define _GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName) glib_queueautoptr_cleanup_##TypeName
1345 #define _GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName) TypeName##_queueautoptr
1346 #define _GLIB_AUTO_FUNC_NAME(TypeName) glib_auto_cleanup_##TypeName
1347 #define _GLIB_CLEANUP(func) __attribute__((cleanup(func)))
1348 #define _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(TypeName, ParentName, cleanup) \
1349 typedef TypeName *_GLIB_AUTOPTR_TYPENAME(TypeName); \
1350 typedef GList *_GLIB_AUTOPTR_LIST_TYPENAME(TypeName); \
1351 typedef GSList *_GLIB_AUTOPTR_SLIST_TYPENAME(TypeName); \
1352 typedef GQueue *_GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName); \
1353 G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
1354 static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) (TypeName *_ptr) \
1355 { if (_ptr) (cleanup) ((ParentName *) _ptr); } \
1356 static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_FUNC_NAME(TypeName) (TypeName **_ptr) \
1357 { _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) (*_ptr); } \
1358 static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) (GList **_l) \
1359 { g_list_free_full (*_l, (GDestroyNotify) (void(*)(void)) cleanup); } \
1360 static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) (GSList **_l) \
1361 { g_slist_free_full (*_l, (GDestroyNotify) (void(*)(void)) cleanup); } \
1362 static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName) (GQueue **_q) \
1363 { if (*_q) g_queue_free_full (*_q, (GDestroyNotify) (void(*)(void)) cleanup); } \
1364 G_GNUC_END_IGNORE_DEPRECATIONS
1365 #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName) \
1366 _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(ModuleObjName, ParentName, _GLIB_AUTOPTR_CLEAR_FUNC_NAME(ParentName))
1369 /* these macros are API */
1370 #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func) \
1371 _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(TypeName, TypeName, func)
1372 #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) \
1373 G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
1374 static G_GNUC_UNUSED inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { (func) (_ptr); } \
1375 G_GNUC_END_IGNORE_DEPRECATIONS
1376 #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none) \
1377 G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
1378 static G_GNUC_UNUSED inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { if (*_ptr != none) (func) (*_ptr); } \
1379 G_GNUC_END_IGNORE_DEPRECATIONS
1380 #define g_autoptr(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_TYPENAME(TypeName)
1381 #define g_autolist(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_LIST_TYPENAME(TypeName)
1382 #define g_autoslist(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_SLIST_TYPENAME(TypeName)
1383 #define g_autoqueue(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName)
1384 #define g_auto(TypeName) _GLIB_CLEANUP(_GLIB_AUTO_FUNC_NAME(TypeName)) TypeName
1385 #define g_autofree _GLIB_CLEANUP(g_autoptr_cleanup_generic_gfree)
1387 #else /* not GNU C */
1388 /* this (dummy) macro is private */
1389 #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName)
1391 /* these (dummy) macros are API */
1392 #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func)
1393 #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func)
1394 #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none)
1396 /* no declaration of g_auto() or g_autoptr() here */
1397 #endif /* __GNUC__ */
1401 #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName)
1403 #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func)
1404 #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func)
1405 #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none)
1407 #endif /* __GI_SCANNER__ */
1411 * @struct_type: a structure type, e.g. #GOutputVector
1412 * @member: a field in the structure, e.g. `size`
1414 * Returns the size of @member in the struct definition without having a
1415 * declared instance of @struct_type.
1417 * Returns: the size of @member in bytes.
1421 #define G_SIZEOF_MEMBER(struct_type, member) \
1422 GLIB_AVAILABLE_MACRO_IN_2_64 \
1423 sizeof (((struct_type *) 0)->member)
1425 #endif /* __G_MACROS_H__ */