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Code Editor : gmacros.h
/* GLIB - Library of useful routines for C programming * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ /* * Modified by the GLib Team and others 1997-2000. See the AUTHORS * file for a list of people on the GLib Team. See the ChangeLog * files for a list of changes. These files are distributed with * GLib at ftp://ftp.gtk.org/pub/gtk/. */ /* This file must not include any other glib header file and must thus * not refer to variables from glibconfig.h */ #ifndef __G_MACROS_H__ #define __G_MACROS_H__ #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) #error "Only <glib.h> can be included directly." #endif /* We include stddef.h to get the system's definition of NULL */ #include <stddef.h> #ifdef __GNUC__ #define G_GNUC_CHECK_VERSION(major, minor) \ ((__GNUC__ > (major)) || \ ((__GNUC__ == (major)) && \ (__GNUC_MINOR__ >= (minor)))) #else #define G_GNUC_CHECK_VERSION(major, minor) 0 #endif /* Here we provide G_GNUC_EXTENSION as an alias for __extension__, * where this is valid. This allows for warningless compilation of * "long long" types even in the presence of '-ansi -pedantic'. */ #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8) #define G_GNUC_EXTENSION __extension__ #else #define G_GNUC_EXTENSION #endif /* Every compiler that we target supports inlining, but some of them may * complain about it if we don't say "__inline". If we have C99, or if * we are using C++, then we can use "inline" directly. Unfortunately * Visual Studio does not support __STDC_VERSION__, so we need to check * whether we are on Visual Studio 2013 or earlier to see that we need to * say "__inline" in C mode. * Otherwise, we say "__inline" to avoid the warning. */ #define G_CAN_INLINE #ifndef __cplusplus # ifdef _MSC_VER # if (_MSC_VER < 1900) # define G_INLINE_DEFINE_NEEDED # endif # elif !defined(__STDC_VERSION__) || (__STDC_VERSION__ < 199900) # define G_INLINE_DEFINE_NEEDED # endif #endif #ifdef G_INLINE_DEFINE_NEEDED # undef inline # define inline __inline #endif #undef G_INLINE_DEFINE_NEEDED /** * G_INLINE_FUNC: * * This macro used to be used to conditionally define inline functions * in a compatible way before this feature was supported in all * compilers. These days, GLib requires inlining support from the * compiler, so your GLib-using programs can safely assume that the * "inline" keywork works properly. * * Never use this macro anymore. Just say "static inline". * * Deprecated: 2.48: Use "static inline" instead */ /* For historical reasons we need to continue to support those who * define G_IMPLEMENT_INLINES to mean "don't implement this here". */ #ifdef G_IMPLEMENT_INLINES # define G_INLINE_FUNC extern GLIB_DEPRECATED_MACRO_IN_2_48_FOR(static inline) # undef G_CAN_INLINE #else # define G_INLINE_FUNC static inline GLIB_DEPRECATED_MACRO_IN_2_48_FOR(static inline) #endif /* G_IMPLEMENT_INLINES */ /* Provide macros to feature the GCC function attribute. */ /** * G_GNUC_PURE: * * Expands to the GNU C `pure` function attribute if the compiler is gcc. * Declaring a function as `pure` enables better optimization of calls to * the function. A `pure` function has no effects except its return value * and the return value depends only on the parameters and/or global * variables. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * gboolean g_type_check_value (const GValue *value) G_GNUC_PURE; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-pure-function-attribute) for more details. */ /** * G_GNUC_MALLOC: * * Expands to the * [GNU C `malloc` function attribute](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-functions-that-behave-like-malloc) * if the compiler is gcc. * Declaring a function as `malloc` enables better optimization of the function, * but must only be done if the allocation behaviour of the function is fully * understood, otherwise miscompilation can result. * * A function can have the `malloc` attribute if it returns a pointer which is * guaranteed to not alias with any other pointer valid when the function * returns, and moreover no pointers to valid objects occur in any storage * addressed by the returned pointer. * * In practice, this means that `G_GNUC_MALLOC` can be used with any function * which returns unallocated or zeroed-out memory, but not with functions which * return initialised structures containing other pointers, or with functions * that reallocate memory. This definition changed in GLib 2.58 to match the * stricter definition introduced around GCC 5. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1); * ]| * * See the * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-functions-that-behave-like-malloc) * for more details. * * Since: 2.6 */ /** * G_GNUC_NO_INLINE: * * Expands to the GNU C `noinline` function attribute if the compiler is gcc. * If the compiler is not gcc, this macro expands to nothing. * * Declaring a function as `noinline` prevents the function from being * considered for inlining. * * The attribute may be placed before the declaration or definition, * right before the `static` keyword. * * |[<!-- language="C" --> * G_GNUC_NO_INLINE * static int * do_not_inline_this (void) * { * ... * } * ]| * * See the * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noinline-function-attribute) * for more details. * * Since: 2.58 */ #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) #define G_GNUC_PURE __attribute__((__pure__)) #define G_GNUC_MALLOC __attribute__((__malloc__)) #define G_GNUC_NO_INLINE __attribute__((noinline)) #else #define G_GNUC_PURE #define G_GNUC_MALLOC #define G_GNUC_NO_INLINE #endif /** * G_GNUC_NULL_TERMINATED: * * Expands to the GNU C `sentinel` function attribute if the compiler is gcc. * This function attribute only applies to variadic functions and instructs * the compiler to check that the argument list is terminated with an * explicit %NULL. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * gchar *g_strconcat (const gchar *string1, * ...) G_GNUC_NULL_TERMINATED; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-sentinel-function-attribute) for more details. * * Since: 2.8 */ #if __GNUC__ >= 4 #define G_GNUC_NULL_TERMINATED __attribute__((__sentinel__)) #else #define G_GNUC_NULL_TERMINATED #endif /* * We can only use __typeof__ on GCC >= 4.8, and not when compiling C++. Since * __typeof__ is used in a few places in GLib, provide a pre-processor symbol * to factor the check out from callers. * * This symbol is private. */ #undef g_has_typeof #if defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) && !defined(__cplusplus) #define g_has_typeof #endif /* * Clang feature detection: http://clang.llvm.org/docs/LanguageExtensions.html * These are not available on GCC, but since the pre-processor doesn't do * operator short-circuiting, we can't use it in a statement or we'll get: * * error: missing binary operator before token "(" * * So we define it to 0 to satisfy the pre-processor. */ #ifdef __has_attribute #define g_macro__has_attribute __has_attribute #else #define g_macro__has_attribute(x) 0 #endif #ifdef __has_feature #define g_macro__has_feature __has_feature #else #define g_macro__has_feature(x) 0 #endif #ifdef __has_builtin #define g_macro__has_builtin __has_builtin #else #define g_macro__has_builtin(x) 0 #endif /** * G_GNUC_ALLOC_SIZE: * @x: the index of the argument specifying the allocation size * * Expands to the GNU C `alloc_size` function attribute if the compiler * is a new enough gcc. This attribute tells the compiler that the * function returns a pointer to memory of a size that is specified * by the @xth function parameter. * * Place the attribute after the function declaration, just before the * semicolon. * * |[<!-- language="C" --> * gpointer g_malloc (gsize n_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(1); * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alloc_005fsize-function-attribute) for more details. * * Since: 2.18 */ /** * G_GNUC_ALLOC_SIZE2: * @x: the index of the argument specifying one factor of the allocation size * @y: the index of the argument specifying the second factor of the allocation size * * Expands to the GNU C `alloc_size` function attribute if the compiler is a * new enough gcc. This attribute tells the compiler that the function returns * a pointer to memory of a size that is specified by the product of two * function parameters. * * Place the attribute after the function declaration, just before the * semicolon. * * |[<!-- language="C" --> * gpointer g_malloc_n (gsize n_blocks, * gsize n_block_bytes) G_GNUC_MALLOC G_GNUC_ALLOC_SIZE2(1, 2); * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-alloc_005fsize-function-attribute) for more details. * * Since: 2.18 */ #if (!defined(__clang__) && ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))) || \ (defined(__clang__) && g_macro__has_attribute(__alloc_size__)) #define G_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x))) #define G_GNUC_ALLOC_SIZE2(x,y) __attribute__((__alloc_size__(x,y))) #else #define G_GNUC_ALLOC_SIZE(x) #define G_GNUC_ALLOC_SIZE2(x,y) #endif /** * G_GNUC_PRINTF: * @format_idx: the index of the argument corresponding to the * format string (the arguments are numbered from 1) * @arg_idx: the index of the first of the format arguments, or 0 if * there are no format arguments * * Expands to the GNU C `format` function attribute if the compiler is gcc. * This is used for declaring functions which take a variable number of * arguments, with the same syntax as `printf()`. It allows the compiler * to type-check the arguments passed to the function. * * Place the attribute after the function declaration, just before the * semicolon. * * See the * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288) * for more details. * * |[<!-- language="C" --> * gint g_snprintf (gchar *string, * gulong n, * gchar const *format, * ...) G_GNUC_PRINTF (3, 4); * ]| */ /** * G_GNUC_SCANF: * @format_idx: the index of the argument corresponding to * the format string (the arguments are numbered from 1) * @arg_idx: the index of the first of the format arguments, or 0 if * there are no format arguments * * Expands to the GNU C `format` function attribute if the compiler is gcc. * This is used for declaring functions which take a variable number of * arguments, with the same syntax as `scanf()`. It allows the compiler * to type-check the arguments passed to the function. * * |[<!-- language="C" --> * int my_scanf (MyStream *stream, * const char *format, * ...) G_GNUC_SCANF (2, 3); * int my_vscanf (MyStream *stream, * const char *format, * va_list ap) G_GNUC_SCANF (2, 0); * ]| * * See the * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288) * for details. */ /** * G_GNUC_STRFTIME: * @format_idx: the index of the argument corresponding to * the format string (the arguments are numbered from 1) * * Expands to the GNU C `strftime` format function attribute if the compiler * is gcc. This is used for declaring functions which take a format argument * which is passed to `strftime()` or an API implementing its formats. It allows * the compiler check the format passed to the function. * * |[<!-- language="C" --> * gsize my_strftime (MyBuffer *buffer, * const char *format, * const struct tm *tm) G_GNUC_STRFTIME (2); * ]| * * See the * [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-3288) * for details. * * Since: 2.60 */ /** * G_GNUC_FORMAT: * @arg_idx: the index of the argument * * Expands to the GNU C `format_arg` function attribute if the compiler * is gcc. This function attribute specifies that a function takes a * format string for a `printf()`, `scanf()`, `strftime()` or `strfmon()` style * function and modifies it, so that the result can be passed to a `printf()`, * `scanf()`, `strftime()` or `strfmon()` style function (with the remaining * arguments to the format function the same as they would have been * for the unmodified string). * * Place the attribute after the function declaration, just before the * semicolon. * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-Wformat-nonliteral-1) for more details. * * |[<!-- language="C" --> * gchar *g_dgettext (gchar *domain_name, gchar *msgid) G_GNUC_FORMAT (2); * ]| */ /** * G_GNUC_NORETURN: * * Expands to the GNU C `noreturn` function attribute if the compiler is gcc. * It is used for declaring functions which never return. It enables * optimization of the function, and avoids possible compiler warnings. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * void g_abort (void) G_GNUC_NORETURN; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-noreturn-function-attribute) for more details. */ /** * G_GNUC_CONST: * * Expands to the GNU C `const` function attribute if the compiler is gcc. * Declaring a function as `const` enables better optimization of calls to * the function. A `const` function doesn't examine any values except its * parameters, and has no effects except its return value. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * gchar g_ascii_tolower (gchar c) G_GNUC_CONST; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-const-function-attribute) for more details. * * A function that has pointer arguments and examines the data pointed to * must not be declared `const`. Likewise, a function that calls a non-`const` * function usually must not be `const`. It doesn't make sense for a `const` * function to return `void`. */ /** * G_GNUC_UNUSED: * * Expands to the GNU C `unused` function attribute if the compiler is gcc. * It is used for declaring functions and arguments which may never be used. * It avoids possible compiler warnings. * * For functions, place the attribute after the declaration, just before the * semicolon. For arguments, place the attribute at the beginning of the * argument declaration. * * |[<!-- language="C" --> * void my_unused_function (G_GNUC_UNUSED gint unused_argument, * gint other_argument) G_GNUC_UNUSED; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-unused-function-attribute) for more details. */ /** * G_GNUC_NO_INSTRUMENT: * * Expands to the GNU C `no_instrument_function` function attribute if the * compiler is gcc. Functions with this attribute will not be instrumented * for profiling, when the compiler is called with the * `-finstrument-functions` option. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * int do_uninteresting_things (void) G_GNUC_NO_INSTRUMENT; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-no_005finstrument_005ffunction-function-attribute) for more details. */ #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4) #if !defined (__clang__) && G_GNUC_CHECK_VERSION (4, 4) #define G_GNUC_PRINTF( format_idx, arg_idx ) \ __attribute__((__format__ (gnu_printf, format_idx, arg_idx))) #define G_GNUC_SCANF( format_idx, arg_idx ) \ __attribute__((__format__ (gnu_scanf, format_idx, arg_idx))) #define G_GNUC_STRFTIME( format_idx ) \ __attribute__((__format__ (gnu_strftime, format_idx, 0))) #else #define G_GNUC_PRINTF( format_idx, arg_idx ) \ __attribute__((__format__ (__printf__, format_idx, arg_idx))) #define G_GNUC_SCANF( format_idx, arg_idx ) \ __attribute__((__format__ (__scanf__, format_idx, arg_idx))) #define G_GNUC_STRFTIME( format_idx ) \ __attribute__((__format__ (__strftime__, format_idx, 0))) #endif #define G_GNUC_FORMAT( arg_idx ) \ __attribute__((__format_arg__ (arg_idx))) #define G_GNUC_NORETURN \ __attribute__((__noreturn__)) #define G_GNUC_CONST \ __attribute__((__const__)) #define G_GNUC_UNUSED \ __attribute__((__unused__)) #define G_GNUC_NO_INSTRUMENT \ __attribute__((__no_instrument_function__)) #else /* !__GNUC__ */ #define G_GNUC_PRINTF( format_idx, arg_idx ) #define G_GNUC_SCANF( format_idx, arg_idx ) #define G_GNUC_STRFTIME( format_idx ) #define G_GNUC_FORMAT( arg_idx ) /* NOTE: MSVC has __declspec(noreturn) but unlike GCC __attribute__, * __declspec can only be placed at the start of the function prototype * and not at the end, so we can't use it without breaking API. */ #define G_GNUC_NORETURN #define G_GNUC_CONST #define G_GNUC_UNUSED #define G_GNUC_NO_INSTRUMENT #endif /* !__GNUC__ */ /** * G_GNUC_FALLTHROUGH: * * Expands to the GNU C `fallthrough` statement attribute if the compiler is gcc. * This allows declaring case statement to explicitly fall through in switch * statements. To enable this feature, use `-Wimplicit-fallthrough` during * compilation. * * Put the attribute right before the case statement you want to fall through * to. * * |[<!-- language="C" --> * switch (foo) * { * case 1: * g_message ("it's 1"); * G_GNUC_FALLTHROUGH; * case 2: * g_message ("it's either 1 or 2"); * break; * } * ]| * * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Statement-Attributes.html#index-fallthrough-statement-attribute) for more details. * * Since: 2.60 */ #if __GNUC__ > 6 #define G_GNUC_FALLTHROUGH __attribute__((fallthrough)) #else #define G_GNUC_FALLTHROUGH #endif /* __GNUC__ */ /** * G_GNUC_DEPRECATED: * * Expands to the GNU C `deprecated` attribute if the compiler is gcc. * It can be used to mark `typedef`s, variables and functions as deprecated. * When called with the `-Wdeprecated-declarations` option, * gcc will generate warnings when deprecated interfaces are used. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * int my_mistake (void) G_GNUC_DEPRECATED; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute) for more details. * * Since: 2.2 */ #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1) || defined (__clang__) #define G_GNUC_DEPRECATED __attribute__((__deprecated__)) #else #define G_GNUC_DEPRECATED #endif /* __GNUC__ */ /** * G_GNUC_DEPRECATED_FOR: * @f: the intended replacement for the deprecated symbol, * such as the name of a function * * Like %G_GNUC_DEPRECATED, but names the intended replacement for the * deprecated symbol if the version of gcc in use is new enough to support * custom deprecation messages. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * int my_mistake (void) G_GNUC_DEPRECATED_FOR(my_replacement); * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-deprecated-function-attribute) for more details. * * Note that if @f is a macro, it will be expanded in the warning message. * You can enclose it in quotes to prevent this. (The quotes will show up * in the warning, but it's better than showing the macro expansion.) * * Since: 2.26 */ #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || defined (__clang__) #define G_GNUC_DEPRECATED_FOR(f) \ __attribute__((deprecated("Use " #f " instead"))) #else #define G_GNUC_DEPRECATED_FOR(f) G_GNUC_DEPRECATED #endif /* __GNUC__ */ #ifdef __ICC #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ _Pragma ("warning (push)") \ _Pragma ("warning (disable:1478)") #define G_GNUC_END_IGNORE_DEPRECATIONS \ _Pragma ("warning (pop)") #elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ _Pragma ("GCC diagnostic push") \ _Pragma ("GCC diagnostic ignored \"-Wdeprecated-declarations\"") #define G_GNUC_END_IGNORE_DEPRECATIONS \ _Pragma ("GCC diagnostic pop") #elif defined (_MSC_VER) && (_MSC_VER >= 1500) && !defined (__clang__) #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ __pragma (warning (push)) \ __pragma (warning (disable : 4996)) #define G_GNUC_END_IGNORE_DEPRECATIONS \ __pragma (warning (pop)) #elif defined (__clang__) #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ _Pragma("clang diagnostic push") \ _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") #define G_GNUC_END_IGNORE_DEPRECATIONS \ _Pragma("clang diagnostic pop") #else #define G_GNUC_BEGIN_IGNORE_DEPRECATIONS #define G_GNUC_END_IGNORE_DEPRECATIONS #endif /** * G_GNUC_MAY_ALIAS: * * Expands to the GNU C `may_alias` type attribute if the compiler is gcc. * Types with this attribute will not be subjected to type-based alias * analysis, but are assumed to alias with any other type, just like `char`. * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-may_005falias-type-attribute) for details. * * Since: 2.14 */ #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) #define G_GNUC_MAY_ALIAS __attribute__((may_alias)) #else #define G_GNUC_MAY_ALIAS #endif /** * G_GNUC_WARN_UNUSED_RESULT: * * Expands to the GNU C `warn_unused_result` function attribute if the compiler * is gcc. This function attribute makes the compiler emit a warning if the * result of a function call is ignored. * * Place the attribute after the declaration, just before the semicolon. * * |[<!-- language="C" --> * GList *g_list_append (GList *list, * gpointer data) G_GNUC_WARN_UNUSED_RESULT; * ]| * * See the [GNU C documentation](https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-warn_005funused_005fresult-function-attribute) for more details. * * Since: 2.10 */ #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) #define G_GNUC_WARN_UNUSED_RESULT __attribute__((warn_unused_result)) #else #define G_GNUC_WARN_UNUSED_RESULT #endif /* __GNUC__ */ /** * G_GNUC_FUNCTION: * * Expands to "" on all modern compilers, and to __FUNCTION__ on gcc * version 2.x. Don't use it. * * Deprecated: 2.16: Use G_STRFUNC() instead */ /** * G_GNUC_PRETTY_FUNCTION: * * Expands to "" on all modern compilers, and to __PRETTY_FUNCTION__ * on gcc version 2.x. Don't use it. * * Deprecated: 2.16: Use G_STRFUNC() instead */ /* Wrap the gcc __PRETTY_FUNCTION__ and __FUNCTION__ variables with * macros, so we can refer to them as strings unconditionally. * usage not-recommended since gcc-3.0 * * Mark them as deprecated since 2.26, since that’s when version macros were * introduced. */ #if defined (__GNUC__) && (__GNUC__ < 3) #define G_GNUC_FUNCTION __FUNCTION__ GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC) #define G_GNUC_PRETTY_FUNCTION __PRETTY_FUNCTION__ GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC) #else /* !__GNUC__ */ #define G_GNUC_FUNCTION "" GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC) #define G_GNUC_PRETTY_FUNCTION "" GLIB_DEPRECATED_MACRO_IN_2_26_FOR(G_STRFUNC) #endif /* !__GNUC__ */ #if g_macro__has_feature(attribute_analyzer_noreturn) && defined(__clang_analyzer__) #define G_ANALYZER_ANALYZING 1 #define G_ANALYZER_NORETURN __attribute__((analyzer_noreturn)) #else #define G_ANALYZER_ANALYZING 0 #define G_ANALYZER_NORETURN #endif #define G_STRINGIFY(macro_or_string) G_STRINGIFY_ARG (macro_or_string) #define G_STRINGIFY_ARG(contents) #contents #ifndef __GI_SCANNER__ /* The static assert macro really confuses the introspection parser */ #define G_PASTE_ARGS(identifier1,identifier2) identifier1 ## identifier2 #define G_PASTE(identifier1,identifier2) G_PASTE_ARGS (identifier1, identifier2) #if !defined(__cplusplus) && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L #define G_STATIC_ASSERT(expr) _Static_assert (expr, "Expression evaluates to false") #elif (defined(__cplusplus) && __cplusplus >= 201103L) || \ (defined(__cplusplus) && defined (_MSC_VER) && (_MSC_VER >= 1600)) || \ (defined (_MSC_VER) && (_MSC_VER >= 1800)) #define G_STATIC_ASSERT(expr) static_assert (expr, "Expression evaluates to false") #else #ifdef __COUNTER__ #define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __COUNTER__)[(expr) ? 1 : -1] G_GNUC_UNUSED #else #define G_STATIC_ASSERT(expr) typedef char G_PASTE (_GStaticAssertCompileTimeAssertion_, __LINE__)[(expr) ? 1 : -1] G_GNUC_UNUSED #endif #endif /* __STDC_VERSION__ */ #define G_STATIC_ASSERT_EXPR(expr) ((void) sizeof (char[(expr) ? 1 : -1])) #endif /* !__GI_SCANNER__ */ /* Provide a string identifying the current code position */ #if defined(__GNUC__) && (__GNUC__ < 3) && !defined(__cplusplus) #define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__) ":" __PRETTY_FUNCTION__ "()" #else #define G_STRLOC __FILE__ ":" G_STRINGIFY (__LINE__) #endif /* Provide a string identifying the current function, non-concatenatable */ #if defined (__GNUC__) && defined (__cplusplus) #define G_STRFUNC ((const char*) (__PRETTY_FUNCTION__)) #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L #define G_STRFUNC ((const char*) (__func__)) #elif defined (__GNUC__) || (defined(_MSC_VER) && (_MSC_VER > 1300)) #define G_STRFUNC ((const char*) (__FUNCTION__)) #else #define G_STRFUNC ((const char*) ("???")) #endif /* Guard C code in headers, while including them from C++ */ #ifdef __cplusplus #define G_BEGIN_DECLS extern "C" { #define G_END_DECLS } #else #define G_BEGIN_DECLS #define G_END_DECLS #endif /* Provide definitions for some commonly used macros. * Some of them are only provided if they haven't already * been defined. It is assumed that if they are already * defined then the current definition is correct. */ #ifndef NULL # ifdef __cplusplus # define NULL (0L) # else /* !__cplusplus */ # define NULL ((void*) 0) # endif /* !__cplusplus */ #endif #ifndef FALSE #define FALSE (0) #endif #ifndef TRUE #define TRUE (!FALSE) #endif #undef MAX #define MAX(a, b) (((a) > (b)) ? (a) : (b)) #undef MIN #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #undef ABS #define ABS(a) (((a) < 0) ? -(a) : (a)) #undef CLAMP #define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x))) #define G_APPROX_VALUE(a, b, epsilon) \ (((a) > (b) ? (a) - (b) : (b) - (a)) < (epsilon)) /* Count the number of elements in an array. The array must be defined * as such; using this with a dynamically allocated array will give * incorrect results. */ #define G_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0])) /* Macros by analogy to GINT_TO_POINTER, GPOINTER_TO_INT */ #define GPOINTER_TO_SIZE(p) ((gsize) (p)) #define GSIZE_TO_POINTER(s) ((gpointer) (gsize) (s)) /* Provide convenience macros for handling structure * fields through their offsets. */ #if (defined(__GNUC__) && __GNUC__ >= 4) || defined (_MSC_VER) #define G_STRUCT_OFFSET(struct_type, member) \ ((glong) offsetof (struct_type, member)) #else #define G_STRUCT_OFFSET(struct_type, member) \ ((glong) ((guint8*) &((struct_type*) 0)->member)) #endif #define G_STRUCT_MEMBER_P(struct_p, struct_offset) \ ((gpointer) ((guint8*) (struct_p) + (glong) (struct_offset))) #define G_STRUCT_MEMBER(member_type, struct_p, struct_offset) \ (*(member_type*) G_STRUCT_MEMBER_P ((struct_p), (struct_offset))) /* Provide simple macro statement wrappers: * G_STMT_START { statements; } G_STMT_END; * This can be used as a single statement, like: * if (x) G_STMT_START { ... } G_STMT_END; else ... * This intentionally does not use compiler extensions like GCC's '({...})' to * avoid portability issue or side effects when compiled with different compilers. * MSVC complains about "while(0)": C4127: "Conditional expression is constant", * so we use __pragma to avoid the warning since the use here is intentional. */ #if !(defined (G_STMT_START) && defined (G_STMT_END)) #define G_STMT_START do #if defined (_MSC_VER) && (_MSC_VER >= 1500) #define G_STMT_END \ __pragma(warning(push)) \ __pragma(warning(disable:4127)) \ while(0) \ __pragma(warning(pop)) #else #define G_STMT_END while (0) #endif #endif /* Provide G_ALIGNOF alignment macro. * * Note we cannot use the gcc __alignof__ operator here, as that returns the * preferred alignment rather than the minimal alignment. See * https://gitlab.gnome.org/GNOME/glib/merge_requests/538/diffs#note_390790. */ /** * G_ALIGNOF * @type: a type-name * * Return the minimal alignment required by the platform ABI for values of the given * type. The address of a variable or struct member of the given type must always be * a multiple of this alignment. For example, most platforms require int variables * to be aligned at a 4-byte boundary, so `G_ALIGNOF (int)` is 4 on most platforms. * * Note this is not necessarily the same as the value returned by GCC’s * `__alignof__` operator, which returns the preferred alignment for a type. * The preferred alignment may be a stricter alignment than the minimal * alignment. * * Since: 2.60 */ #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__cplusplus) #define G_ALIGNOF(type) _Alignof (type) #else #define G_ALIGNOF(type) (G_STRUCT_OFFSET (struct { char a; type b; }, b)) #endif /** * G_CONST_RETURN: * * If %G_DISABLE_CONST_RETURNS is defined, this macro expands * to nothing. By default, the macro expands to const. The macro * can be used in place of const for functions that return a value * that should not be modified. The purpose of this macro is to allow * us to turn on const for returned constant strings by default, while * allowing programmers who find that annoying to turn it off. This macro * should only be used for return values and for "out" parameters, it * doesn't make sense for "in" parameters. * * Deprecated: 2.30: API providers should replace all existing uses with * const and API consumers should adjust their code accordingly */ #ifdef G_DISABLE_CONST_RETURNS #define G_CONST_RETURN GLIB_DEPRECATED_MACRO_IN_2_30_FOR(const) #else #define G_CONST_RETURN const GLIB_DEPRECATED_MACRO_IN_2_30_FOR(const) #endif /* * The G_LIKELY and G_UNLIKELY macros let the programmer give hints to * the compiler about the expected result of an expression. Some compilers * can use this information for optimizations. * * The _G_BOOLEAN_EXPR macro is intended to trigger a gcc warning when * putting assignments in g_return_if_fail (). */ #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__) #define _G_BOOLEAN_EXPR(expr) \ G_GNUC_EXTENSION ({ \ int _g_boolean_var_; \ if (expr) \ _g_boolean_var_ = 1; \ else \ _g_boolean_var_ = 0; \ _g_boolean_var_; \ }) #define G_LIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR(expr), 1)) #define G_UNLIKELY(expr) (__builtin_expect (_G_BOOLEAN_EXPR(expr), 0)) #else #define G_LIKELY(expr) (expr) #define G_UNLIKELY(expr) (expr) #endif #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1) || defined (__clang__) #define G_DEPRECATED __attribute__((__deprecated__)) #elif defined(_MSC_VER) && (_MSC_VER >= 1300) #define G_DEPRECATED __declspec(deprecated) #else #define G_DEPRECATED #endif #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || defined (__clang__) #define G_DEPRECATED_FOR(f) __attribute__((__deprecated__("Use '" #f "' instead"))) #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320) #define G_DEPRECATED_FOR(f) __declspec(deprecated("is deprecated. Use '" #f "' instead")) #else #define G_DEPRECATED_FOR(f) G_DEPRECATED #endif #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || defined (__clang__) #define G_UNAVAILABLE(maj,min) __attribute__((deprecated("Not available before " #maj "." #min))) #elif defined(_MSC_FULL_VER) && (_MSC_FULL_VER > 140050320) #define G_UNAVAILABLE(maj,min) __declspec(deprecated("is not available before " #maj "." #min)) #else #define G_UNAVAILABLE(maj,min) G_DEPRECATED #endif #ifndef _GLIB_EXTERN #define _GLIB_EXTERN extern #endif /* These macros are used to mark deprecated symbols in GLib headers, * and thus have to be exposed in installed headers. But please * do *not* use them in other projects. Instead, use G_DEPRECATED * or define your own wrappers around it. */ #ifdef GLIB_DISABLE_DEPRECATION_WARNINGS #define GLIB_DEPRECATED _GLIB_EXTERN #define GLIB_DEPRECATED_FOR(f) _GLIB_EXTERN #define GLIB_UNAVAILABLE(maj,min) _GLIB_EXTERN #else #define GLIB_DEPRECATED G_DEPRECATED _GLIB_EXTERN #define GLIB_DEPRECATED_FOR(f) G_DEPRECATED_FOR(f) _GLIB_EXTERN #define GLIB_UNAVAILABLE(maj,min) G_UNAVAILABLE(maj,min) _GLIB_EXTERN #endif #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \ (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6) || \ __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 4)) #define _GLIB_GNUC_DO_PRAGMA(x) _Pragma(G_STRINGIFY (x)) #define GLIB_DEPRECATED_MACRO _GLIB_GNUC_DO_PRAGMA(GCC warning "Deprecated pre-processor symbol") #define GLIB_DEPRECATED_MACRO_FOR(f) _GLIB_GNUC_DO_PRAGMA(GCC warning "Deprecated pre-processor symbol, replace with " #f) #define GLIB_UNAVAILABLE_MACRO(maj,min) _GLIB_GNUC_DO_PRAGMA(GCC warning "Not available before " #maj "." #min) #else #define GLIB_DEPRECATED_MACRO #define GLIB_DEPRECATED_MACRO_FOR(f) #define GLIB_UNAVAILABLE_MACRO(maj,min) #endif #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \ ((defined (__GNUC__) && (__GNUC__ > 6 || (__GNUC__ == 6 && __GNUC_MINOR__ >= 1))) || \ (defined (__clang_major__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 0)))) #define GLIB_DEPRECATED_ENUMERATOR G_DEPRECATED #define GLIB_DEPRECATED_ENUMERATOR_FOR(f) G_DEPRECATED_FOR(f) #define GLIB_UNAVAILABLE_ENUMERATOR(maj,min) G_UNAVAILABLE(maj,min) #else #define GLIB_DEPRECATED_ENUMERATOR #define GLIB_DEPRECATED_ENUMERATOR_FOR(f) #define GLIB_UNAVAILABLE_ENUMERATOR(maj,min) #endif #if !defined(GLIB_DISABLE_DEPRECATION_WARNINGS) && \ ((defined (__GNUC__) && (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))) || \ (defined (__clang_major__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 0)))) #define GLIB_DEPRECATED_TYPE G_DEPRECATED #define GLIB_DEPRECATED_TYPE_FOR(f) G_DEPRECATED_FOR(f) #define GLIB_UNAVAILABLE_TYPE(maj,min) G_UNAVAILABLE(maj,min) #else #define GLIB_DEPRECATED_TYPE #define GLIB_DEPRECATED_TYPE_FOR(f) #define GLIB_UNAVAILABLE_TYPE(maj,min) #endif #ifndef __GI_SCANNER__ #if defined (__GNUC__) || defined (__clang__) /* these macros are private */ #define _GLIB_AUTOPTR_FUNC_NAME(TypeName) glib_autoptr_cleanup_##TypeName #define _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) glib_autoptr_clear_##TypeName #define _GLIB_AUTOPTR_TYPENAME(TypeName) TypeName##_autoptr #define _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) glib_listautoptr_cleanup_##TypeName #define _GLIB_AUTOPTR_LIST_TYPENAME(TypeName) TypeName##_listautoptr #define _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) glib_slistautoptr_cleanup_##TypeName #define _GLIB_AUTOPTR_SLIST_TYPENAME(TypeName) TypeName##_slistautoptr #define _GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName) glib_queueautoptr_cleanup_##TypeName #define _GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName) TypeName##_queueautoptr #define _GLIB_AUTO_FUNC_NAME(TypeName) glib_auto_cleanup_##TypeName #define _GLIB_CLEANUP(func) __attribute__((cleanup(func))) #define _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(TypeName, ParentName, cleanup) \ typedef TypeName *_GLIB_AUTOPTR_TYPENAME(TypeName); \ typedef GList *_GLIB_AUTOPTR_LIST_TYPENAME(TypeName); \ typedef GSList *_GLIB_AUTOPTR_SLIST_TYPENAME(TypeName); \ typedef GQueue *_GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName); \ G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) (TypeName *_ptr) \ { if (_ptr) (cleanup) ((ParentName *) _ptr); } \ static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_FUNC_NAME(TypeName) (TypeName **_ptr) \ { _GLIB_AUTOPTR_CLEAR_FUNC_NAME(TypeName) (*_ptr); } \ static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) (GList **_l) \ { g_list_free_full (*_l, (GDestroyNotify) (void(*)(void)) cleanup); } \ static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName) (GSList **_l) \ { g_slist_free_full (*_l, (GDestroyNotify) (void(*)(void)) cleanup); } \ static G_GNUC_UNUSED inline void _GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName) (GQueue **_q) \ { if (*_q) g_queue_free_full (*_q, (GDestroyNotify) (void(*)(void)) cleanup); } \ G_GNUC_END_IGNORE_DEPRECATIONS #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName) \ _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(ModuleObjName, ParentName, _GLIB_AUTOPTR_CLEAR_FUNC_NAME(ParentName)) /* these macros are API */ #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func) \ _GLIB_DEFINE_AUTOPTR_CLEANUP_FUNCS(TypeName, TypeName, func) #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) \ G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ static G_GNUC_UNUSED inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { (func) (_ptr); } \ G_GNUC_END_IGNORE_DEPRECATIONS #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none) \ G_GNUC_BEGIN_IGNORE_DEPRECATIONS \ static G_GNUC_UNUSED inline void _GLIB_AUTO_FUNC_NAME(TypeName) (TypeName *_ptr) { if (*_ptr != none) (func) (*_ptr); } \ G_GNUC_END_IGNORE_DEPRECATIONS #define g_autoptr(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_TYPENAME(TypeName) #define g_autolist(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_LIST_TYPENAME(TypeName) #define g_autoslist(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_SLIST_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_SLIST_TYPENAME(TypeName) #define g_autoqueue(TypeName) _GLIB_CLEANUP(_GLIB_AUTOPTR_QUEUE_FUNC_NAME(TypeName)) _GLIB_AUTOPTR_QUEUE_TYPENAME(TypeName) #define g_auto(TypeName) _GLIB_CLEANUP(_GLIB_AUTO_FUNC_NAME(TypeName)) TypeName #define g_autofree _GLIB_CLEANUP(g_autoptr_cleanup_generic_gfree) #else /* not GNU C */ /* this (dummy) macro is private */ #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName) /* these (dummy) macros are API */ #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func) #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none) /* no declaration of g_auto() or g_autoptr() here */ #endif /* __GNUC__ */ #else #define _GLIB_DEFINE_AUTOPTR_CHAINUP(ModuleObjName, ParentName) #define G_DEFINE_AUTOPTR_CLEANUP_FUNC(TypeName, func) #define G_DEFINE_AUTO_CLEANUP_CLEAR_FUNC(TypeName, func) #define G_DEFINE_AUTO_CLEANUP_FREE_FUNC(TypeName, func, none) #endif /* __GI_SCANNER__ */ /** * G_SIZEOF_MEMBER: * @struct_type: a structure type, e.g. #GOutputVector * @member: a field in the structure, e.g. `size` * * Returns the size of @member in the struct definition without having a * declared instance of @struct_type. * * Returns: the size of @member in bytes. * * Since: 2.64 */ #define G_SIZEOF_MEMBER(struct_type, member) \ GLIB_AVAILABLE_MACRO_IN_2_64 \ sizeof (((struct_type *) 0)->member) #endif /* __G_MACROS_H__ */
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