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network-manager-wireguard/shared/nm-utils/nm-macros-internal.h

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Copy openvpn project as base
2017-11-06 15:02:05 +03:00
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* NetworkManager -- Network link manager
*
* 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 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, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
* (C) Copyright 2014 Red Hat, Inc.
*/
#ifndef __NM_MACROS_INTERNAL_H__
#define __NM_MACROS_INTERNAL_H__
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#define _nm_packed __attribute__ ((packed))
#define _nm_unused __attribute__ ((unused))
#define _nm_pure __attribute__ ((pure))
#define _nm_const __attribute__ ((const))
#define _nm_printf(a,b) __attribute__ ((__format__ (__printf__, a, b)))
#include "nm-glib.h"
/*****************************************************************************/
#define nm_offsetofend(t,m) (G_STRUCT_OFFSET (t,m) + sizeof (((t *) NULL)->m))
#define nm_auto(fcn) __attribute__ ((cleanup(fcn)))
/**
* nm_auto_free:
*
* Call free() on a variable location when it goes out of scope.
*/
#define nm_auto_free nm_auto(_nm_auto_free_impl)
GS_DEFINE_CLEANUP_FUNCTION(void*, _nm_auto_free_impl, free)
static inline void
_nm_auto_unset_gvalue_impl (GValue *v)
{
g_value_unset (v);
}
#define nm_auto_unset_gvalue nm_auto(_nm_auto_unset_gvalue_impl)
static inline void
_nm_auto_unref_gtypeclass (gpointer v)
{
if (v && *((gpointer *) v))
g_type_class_unref (*((gpointer *) v));
}
#define nm_auto_unref_gtypeclass nm_auto(_nm_auto_unref_gtypeclass)
static inline void
_nm_auto_free_gstring_impl (GString **str)
{
if (*str)
g_string_free (*str, TRUE);
}
#define nm_auto_free_gstring nm_auto(_nm_auto_free_gstring_impl)
static inline void
_nm_auto_close_impl (int *pfd)
{
if (*pfd >= 0) {
int errsv = errno;
(void) close (*pfd);
errno = errsv;
}
}
#define nm_auto_close nm_auto(_nm_auto_close_impl)
static inline void
_nm_auto_fclose_impl (FILE **pfd)
{
if (*pfd) {
int errsv = errno;
(void) fclose (*pfd);
errno = errsv;
}
}
#define nm_auto_fclose nm_auto(_nm_auto_fclose_impl)
static inline void
_nm_auto_protect_errno (int *p_saved_errno)
{
errno = *p_saved_errno;
}
#define NM_AUTO_PROTECT_ERRNO(errsv_saved) nm_auto(_nm_auto_protect_errno) _nm_unused const int errsv_saved = (errno)
/*****************************************************************************/
/* http://stackoverflow.com/a/11172679 */
#define _NM_UTILS_MACRO_FIRST(...) __NM_UTILS_MACRO_FIRST_HELPER(__VA_ARGS__, throwaway)
#define __NM_UTILS_MACRO_FIRST_HELPER(first, ...) first
#define _NM_UTILS_MACRO_REST(...) __NM_UTILS_MACRO_REST_HELPER(__NM_UTILS_MACRO_REST_NUM(__VA_ARGS__), __VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER(qty, ...) __NM_UTILS_MACRO_REST_HELPER2(qty, __VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER2(qty, ...) __NM_UTILS_MACRO_REST_HELPER_##qty(__VA_ARGS__)
#define __NM_UTILS_MACRO_REST_HELPER_ONE(first)
#define __NM_UTILS_MACRO_REST_HELPER_TWOORMORE(first, ...) , __VA_ARGS__
#define __NM_UTILS_MACRO_REST_NUM(...) \
__NM_UTILS_MACRO_REST_SELECT_30TH(__VA_ARGS__, \
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\
TWOORMORE, TWOORMORE, TWOORMORE, ONE, throwaway)
#define __NM_UTILS_MACRO_REST_SELECT_30TH(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30, ...) a30
/*****************************************************************************/
/* http://stackoverflow.com/a/2124385/354393 */
#define NM_NARG(...) \
_NM_NARG(__VA_ARGS__,_NM_NARG_RSEQ_N())
#define _NM_NARG(...) \
_NM_NARG_ARG_N(__VA_ARGS__)
#define _NM_NARG_ARG_N( \
_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,N,...) N
#define _NM_NARG_RSEQ_N() \
63,62,61,60, \
59,58,57,56,55,54,53,52,51,50, \
49,48,47,46,45,44,43,42,41,40, \
39,38,37,36,35,34,33,32,31,30, \
29,28,27,26,25,24,23,22,21,20, \
19,18,17,16,15,14,13,12,11,10, \
9,8,7,6,5,4,3,2,1,0
/*****************************************************************************/
#if defined (__GNUC__)
#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(GCC diagnostic ignored warning)
#elif defined (__clang__)
#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(clang diagnostic ignored warning)
#endif
/* you can only suppress a specific warning that the compiler
* understands. Otherwise you will get another compiler warning
* about invalid pragma option.
* It's not that bad however, because gcc and clang often have the
* same name for the same warning. */
#if defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
#define NM_PRAGMA_WARNING_DISABLE(warning) \
_Pragma("GCC diagnostic push") \
_Pragma(_NM_PRAGMA_WARNING_DO(warning))
#elif defined (__clang__)
#define NM_PRAGMA_WARNING_DISABLE(warning) \
_Pragma("clang diagnostic push") \
_Pragma(_NM_PRAGMA_WARNING_DO(warning))
#else
#define NM_PRAGMA_WARNING_DISABLE(warning)
#endif
#if defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6))
#define NM_PRAGMA_WARNING_REENABLE \
_Pragma("GCC diagnostic pop")
#elif defined (__clang__)
#define NM_PRAGMA_WARNING_REENABLE \
_Pragma("clang diagnostic pop")
#else
#define NM_PRAGMA_WARNING_REENABLE
#endif
/*****************************************************************************/
/**
* NM_G_ERROR_MSG:
* @error: (allow-none): the #GError instance
*
* All functions must follow the convention that when they
* return a failure, they must also set the GError to a valid
* message. For external API however, we want to be extra
* careful before accessing the error instance. Use NM_G_ERROR_MSG()
* which is safe to use on NULL.
*
* Returns: the error message.
**/
static inline const char *
NM_G_ERROR_MSG (GError *error)
{
return error ? (error->message ? : "(null)") : "(no-error)"; \
}
/*****************************************************************************/
/* macro to return strlen() of a compile time string. */
#define NM_STRLEN(str) ( sizeof ("" str) - 1 )
/* returns the length of a NULL terminated array of pointers,
* like g_strv_length() does. The difference is:
* - it operats on arrays of pointers (of any kind, requiring no cast).
* - it accepts NULL to return zero. */
#define NM_PTRARRAY_LEN(array) \
({ \
typeof (*(array)) *const _array = (array); \
gsize _n = 0; \
\
if (_array) { \
_nm_unused typeof (*(_array[0])) *_array_check = _array[0]; \
while (_array[_n]) \
_n++; \
} \
_n; \
})
/* Note: @value is only evaluated when *out_val is present.
* Thus,
* NM_SET_OUT (out_str, g_strdup ("hallo"));
* does the right thing.
*/
#define NM_SET_OUT(out_val, value) \
G_STMT_START { \
typeof(*(out_val)) *_out_val = (out_val); \
\
if (_out_val) { \
*_out_val = (value); \
} \
} G_STMT_END
/*****************************************************************************/
#if (defined (__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 9 ))) || (defined (__clang__))
#define _NM_CC_SUPPORT_GENERIC 1
#else
#define _NM_CC_SUPPORT_GENERIC 0
#endif
#if _NM_CC_SUPPORT_GENERIC
#define _NM_CONSTCAST(type, obj) \
(_Generic ((obj), \
void * : ((type *) (obj)), \
void *const : ((type *) (obj)), \
const void * : ((const type *) (obj)), \
const void *const: ((const type *) (obj)), \
const type * : (obj), \
const type *const: (obj), \
type * : (obj), \
type *const : (obj)))
#else
/* _NM_CONSTCAST() is there to preserve constness of a pointer.
* It uses C11's _Generic(). If that is not supported, we fall back
* to casting away constness. So, with _Generic, we get some additional
* static type checking by preserving constness, without, we cast it
* to a non-const pointer. */
#define _NM_CONSTCAST(type, obj) \
((type *) (obj))
#endif
/*****************************************************************************/
#define _NM_IN_SET_EVAL_1( op, _x, y) (_x == (y))
#define _NM_IN_SET_EVAL_2( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_1 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_3( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_2 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_4( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_3 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_5( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_4 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_6( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_5 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_7( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_6 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_8( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_7 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_9( op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_8 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_10(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_9 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_11(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_10 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_12(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_11 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_13(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_12 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_14(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_13 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_15(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_14 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_16(op, _x, y, ...) (_x == (y)) op _NM_IN_SET_EVAL_15 (op, _x, __VA_ARGS__)
#define _NM_IN_SET_EVAL_N2(op, _x, n, ...) (_NM_IN_SET_EVAL_##n(op, _x, __VA_ARGS__))
#define _NM_IN_SET_EVAL_N(op, type, x, n, ...) \
({ \
type _x = (x); \
\
/* trigger a -Wenum-compare warning */ \
nm_assert (TRUE || _x == (x)); \
\
!!_NM_IN_SET_EVAL_N2(op, _x, n, __VA_ARGS__); \
})
#define _NM_IN_SET(op, type, x, ...) _NM_IN_SET_EVAL_N(op, type, x, NM_NARG (__VA_ARGS__), __VA_ARGS__)
/* Beware that this does short-circuit evaluation (use "||" instead of "|")
* which has a possibly unexpected non-function-like behavior.
* Use NM_IN_SET_SE if you need all arguments to be evaluted. */
#define NM_IN_SET(x, ...) _NM_IN_SET(||, typeof (x), x, __VA_ARGS__)
/* "SE" stands for "side-effect". Contrary to NM_IN_SET(), this does not do
* short-circuit evaluation, which can make a difference if the arguments have
* side-effects. */
#define NM_IN_SET_SE(x, ...) _NM_IN_SET(|, typeof (x), x, __VA_ARGS__)
/* the *_TYPED forms allow to explicitly select the type of "x". This is useful
* if "x" doesn't support typeof (bitfields) or you want to gracefully convert
* a type using automatic type conversion rules (but not forcing the conversion
* with a cast). */
#define NM_IN_SET_TYPED(type, x, ...) _NM_IN_SET(||, type, x, __VA_ARGS__)
#define NM_IN_SET_SE_TYPED(type, x, ...) _NM_IN_SET(|, type, x, __VA_ARGS__)
/*****************************************************************************/
static inline gboolean
_NM_IN_STRSET_streq (const char *x, const char *s)
{
return s && strcmp (x, s) == 0;
}
#define _NM_IN_STRSET_EVAL_1( op, _x, y) _NM_IN_STRSET_streq (_x, y)
#define _NM_IN_STRSET_EVAL_2( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_1 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_3( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_2 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_4( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_3 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_5( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_4 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_6( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_5 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_7( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_6 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_8( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_7 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_9( op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_8 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_10(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_9 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_11(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_10 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_12(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_11 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_13(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_12 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_14(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_13 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_15(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_14 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_16(op, _x, y, ...) _NM_IN_STRSET_streq (_x, y) op _NM_IN_STRSET_EVAL_15 (op, _x, __VA_ARGS__)
#define _NM_IN_STRSET_EVAL_N2(op, _x, n, ...) (_NM_IN_STRSET_EVAL_##n(op, _x, __VA_ARGS__))
#define _NM_IN_STRSET_EVAL_N(op, x, n, ...) \
({ \
const char *_x = (x); \
( ((_x == NULL) && _NM_IN_SET_EVAL_N2 (op, ((const char *) NULL), n, __VA_ARGS__)) \
|| ((_x != NULL) && _NM_IN_STRSET_EVAL_N2 (op, _x, n, __VA_ARGS__)) \
); \
})
/* Beware that this does short-circuit evaluation (use "||" instead of "|")
* which has a possibly unexpected non-function-like behavior.
* Use NM_IN_STRSET_SE if you need all arguments to be evaluted. */
#define NM_IN_STRSET(x, ...) _NM_IN_STRSET_EVAL_N(||, x, NM_NARG (__VA_ARGS__), __VA_ARGS__)
/* "SE" stands for "side-effect". Contrary to NM_IN_STRSET(), this does not do
* short-circuit evaluation, which can make a difference if the arguments have
* side-effects. */
#define NM_IN_STRSET_SE(x, ...) _NM_IN_STRSET_EVAL_N(|, x, NM_NARG (__VA_ARGS__), __VA_ARGS__)
#define NM_STRCHAR_ALL(str, ch_iter, predicate) \
({ \
gboolean _val = TRUE; \
const char *_str = (str); \
\
if (_str) { \
for (;;) { \
const char ch_iter = _str[0]; \
\
if (ch_iter != '\0') { \
if (predicate) {\
_str++; \
continue; \
} \
_val = FALSE; \
} \
break; \
} \
} \
_val; \
})
#define NM_STRCHAR_ANY(str, ch_iter, predicate) \
({ \
gboolean _val = FALSE; \
const char *_str = (str); \
\
if (_str) { \
for (;;) { \
const char ch_iter = _str[0]; \
\
if (ch_iter != '\0') { \
if (predicate) { \
; \
} else { \
_str++; \
continue; \
} \
_val = TRUE; \
} \
break; \
} \
} \
_val; \
})
/*****************************************************************************/
static inline guint
NM_HASH_COMBINE (guint h, guint val)
{
/* see g_str_hash() for reasons */
return (h << 5) + h + val;
}
static inline guint
NM_HASH_COMBINE_UINT64 (guint h, guint64 val)
{
return NM_HASH_COMBINE (h, (((guint) val) & 0xFFFFFFFFu) + ((guint) (val >> 32)));
}
/*****************************************************************************/
/* NM_CACHED_QUARK() returns the GQuark for @string, but caches
* it in a static variable to speed up future lookups.
*
* @string must be a string literal.
*/
#define NM_CACHED_QUARK(string) \
({ \
static GQuark _nm_cached_quark = 0; \
\
(G_LIKELY (_nm_cached_quark != 0) \
? _nm_cached_quark \
: (_nm_cached_quark = g_quark_from_static_string (""string""))); \
})
/* NM_CACHED_QUARK_FCN() is essentially the same as G_DEFINE_QUARK
* with two differences:
* - @string must be a quited string-literal
* - @fcn must be the full function name, while G_DEFINE_QUARK() appends
* "_quark" to the function name.
* Both properties of G_DEFINE_QUARK() are non favorable, because you can no
* longer grep for string/fcn -- unless you are aware that you are searching
* for G_DEFINE_QUARK() and omit quotes / append _quark(). With NM_CACHED_QUARK_FCN(),
* ctags/cscope can locate the use of @fcn (though it doesn't recognize that
* NM_CACHED_QUARK_FCN() defines it).
*/
#define NM_CACHED_QUARK_FCN(string, fcn) \
GQuark \
fcn (void) \
{ \
return NM_CACHED_QUARK (string); \
}
/*****************************************************************************/
#define nm_streq(s1, s2) (strcmp (s1, s2) == 0)
#define nm_streq0(s1, s2) (g_strcmp0 (s1, s2) == 0)
/*****************************************************************************/
static inline GString *
nm_gstring_prepare (GString **l)
{
if (*l)
g_string_set_size (*l, 0);
else
*l = g_string_sized_new (30);
return *l;
}
static inline const char *
nm_str_not_empty (const char *str)
{
return str && str[0] ? str : NULL;
}
static inline char *
nm_strdup_not_empty (const char *str)
{
return str && str[0] ? g_strdup (str) : NULL;
}
static inline char *
nm_str_realloc (char *str)
{
gs_free char *s = str;
/* Returns a new clone of @str and frees @str. The point is that @str
* possibly points to a larger chunck of memory. We want to freshly allocate
* a buffer.
*
* We could use realloc(), but that might not do anything or leave
* @str in its memory pool for chunks of a different size (bad for
* fragmentation).
*
* This is only useful when we want to keep the buffer around for a long
* time and want to re-allocate a more optimal buffer. */
return g_strdup (s);
}
/*****************************************************************************/
#define NM_PRINT_FMT_QUOTED(cond, prefix, str, suffix, str_else) \
(cond) ? (prefix) : "", \
(cond) ? (str) : (str_else), \
(cond) ? (suffix) : ""
#define NM_PRINT_FMT_QUOTE_STRING(arg) NM_PRINT_FMT_QUOTED((arg), "\"", (arg), "\"", "(null)")
/*****************************************************************************/
/* glib/C provides the following kind of assertions:
* - assert() -- disable with NDEBUG
* - g_return_if_fail() -- disable with G_DISABLE_CHECKS
* - g_assert() -- disable with G_DISABLE_ASSERT
* but they are all enabled by default and usually even production builds have
* these kind of assertions enabled. It also means, that disabling assertions
* is an untested configuration, and might have bugs.
*
* Add our own assertion macro nm_assert(), which is disabled by default and must
* be explicitly enabled. They are useful for more expensive checks or checks that
* depend less on runtime conditions (that is, are generally expected to be true). */
#ifndef NM_MORE_ASSERTS
#define NM_MORE_ASSERTS 0
#endif
#if NM_MORE_ASSERTS
#define nm_assert(cond) G_STMT_START { g_assert (cond); } G_STMT_END
#define nm_assert_se(cond) G_STMT_START { if (G_LIKELY (cond)) { ; } else { g_assert (FALSE && (cond)); } } G_STMT_END
#define nm_assert_not_reached() G_STMT_START { g_assert_not_reached (); } G_STMT_END
#else
#define nm_assert(cond) G_STMT_START { if (FALSE) { if (cond) { } } } G_STMT_END
#define nm_assert_se(cond) G_STMT_START { if (G_LIKELY (cond)) { ; } } G_STMT_END
#define nm_assert_not_reached() G_STMT_START { ; } G_STMT_END
#endif
/*****************************************************************************/
#define NM_GOBJECT_PROPERTIES_DEFINE_BASE(...) \
typedef enum { \
_PROPERTY_ENUMS_0, \
__VA_ARGS__ \
_PROPERTY_ENUMS_LAST, \
} _PropertyEnums; \
static GParamSpec *obj_properties[_PROPERTY_ENUMS_LAST] = { NULL, }
#define NM_GOBJECT_PROPERTIES_DEFINE(obj_type, ...) \
NM_GOBJECT_PROPERTIES_DEFINE_BASE (__VA_ARGS__); \
static inline void \
_notify (obj_type *obj, _PropertyEnums prop) \
{ \
nm_assert (G_IS_OBJECT (obj)); \
nm_assert ((gsize) prop < G_N_ELEMENTS (obj_properties)); \
g_object_notify_by_pspec ((GObject *) obj, obj_properties[prop]); \
}
/*****************************************************************************/
/* these are implemented as a macro, because they accept self
* as both (type*) and (const type*), and return a const
* private pointer accordingly. */
#define __NM_GET_PRIVATE(self, type, is_check, addrop) \
({ \
/* preserve the const-ness of self. Unfortunately, that
* way, @self cannot be a void pointer */ \
typeof (self) _self = (self); \
\
/* Get compiler error if variable is of wrong type */ \
_nm_unused const type *const _self2 = (_self); \
\
nm_assert (is_check (_self)); \
( addrop ( _NM_CONSTCAST (type, _self)->_priv) ); \
})
#define _NM_GET_PRIVATE(self, type, is_check) __NM_GET_PRIVATE(self, type, is_check, &)
#define _NM_GET_PRIVATE_PTR(self, type, is_check) __NM_GET_PRIVATE(self, type, is_check, )
#define __NM_GET_PRIVATE_VOID(self, type, is_check, result_cmd) \
({ \
/* (self) can be any non-const pointer. It will be cast to "type *".
* We don't explicitly cast but assign first to (void *) which
* will fail if @self is pointing to const. */ \
void *const _self1 = (self); \
type *const _self = _self1; \
\
nm_assert (is_check (_self)); \
( result_cmd ); \
})
#define _NM_GET_PRIVATE_VOID(self, type, is_check) __NM_GET_PRIVATE_VOID(self, type, is_check, &_self->_priv)
#define _NM_GET_PRIVATE_PTR_VOID(self, type, is_check) __NM_GET_PRIVATE_VOID(self, type, is_check, _self->_priv)
/*****************************************************************************/
static inline gpointer
nm_g_object_ref (gpointer obj)
{
/* g_object_ref() doesn't accept NULL. */
if (obj)
g_object_ref (obj);
return obj;
}
static inline void
nm_g_object_unref (gpointer obj)
{
/* g_object_unref() doesn't accept NULL. Usully, we workaround that
* by using g_clear_object(), but sometimes that is not convinient
* (for example as as destroy function for a hash table that can contain
* NULL values). */
if (obj)
g_object_unref (obj);
}
/* Assigns GObject @obj to destination @pdst, and takes an additional ref.
* The previous value of @pdst is unrefed.
*
* It makes sure to first increase the ref-count of @obj, and handles %NULL
* @obj correctly.
* */
#define nm_g_object_ref_set(pp, obj) \
({ \
typeof (*(pp)) *const _pp = (pp); \
typeof (**_pp) *const _obj = (obj); \
typeof (**_pp) *_p; \
gboolean _changed = FALSE; \
\
if ( _pp \
&& ((_p = *_pp) != _obj)) { \
if (_obj) { \
nm_assert (G_IS_OBJECT (_obj)); \
g_object_ref (_obj); \
} \
if (_p) { \
nm_assert (G_IS_OBJECT (_p)); \
*_pp = NULL; \
g_object_unref (_p); \
} \
*_pp = _obj; \
_changed = TRUE; \
} \
_changed; \
})
/* basically, replaces
* g_clear_pointer (&location, g_free)
* with
* nm_clear_g_free (&location)
*
* Another advantage is that by using a macro and typeof(), it is more
* typesafe and gives you for example a compiler warning when pp is a const
* pointer or points to a const-pointer.
*/
#define nm_clear_g_free(pp) \
({ \
typeof (*(pp)) *_pp = (pp); \
typeof (**_pp) *_p; \
gboolean _changed = FALSE; \
\
if ( _pp \
&& (_p = *_pp)) { \
*_pp = NULL; \
g_free (_p); \
_changed = TRUE; \
} \
_changed; \
})
#define nm_clear_g_object(pp) \
({ \
typeof (*(pp)) *_pp = (pp); \
typeof (**_pp) *_p; \
gboolean _changed = FALSE; \
\
if ( _pp \
&& (_p = *_pp)) { \
nm_assert (G_IS_OBJECT (_p)); \
*_pp = NULL; \
g_object_unref (_p); \
_changed = TRUE; \
} \
_changed; \
})
static inline gboolean
nm_clear_g_source (guint *id)
{
if (id && *id) {
g_source_remove (*id);
*id = 0;
return TRUE;
}
return FALSE;
}
static inline gboolean
nm_clear_g_signal_handler (gpointer self, gulong *id)
{
if (id && *id) {
g_signal_handler_disconnect (self, *id);
*id = 0;
return TRUE;
}
return FALSE;
}
static inline gboolean
nm_clear_g_variant (GVariant **variant)
{
if (variant && *variant) {
g_variant_unref (*variant);
*variant = NULL;
return TRUE;
}
return FALSE;
}
static inline gboolean
nm_clear_g_cancellable (GCancellable **cancellable)
{
if (cancellable && *cancellable) {
g_cancellable_cancel (*cancellable);
g_object_unref (*cancellable);
*cancellable = NULL;
return TRUE;
}
return FALSE;
}
/*****************************************************************************/
/* Determine whether @x is a power of two (@x being an integer type).
* Basically, this returns TRUE, if @x has exactly one bit set.
* For negative values and zero, this always returns FALSE. */
#define nm_utils_is_power_of_two(x) ({ \
typeof(x) __x = (x); \
\
( (__x > ((typeof(__x)) 0)) \
&& ((__x & (__x - (((typeof(__x)) 1)))) == ((typeof(__x)) 0))); \
})
/*****************************************************************************/
#define NM_UTILS_LOOKUP_DEFAULT(v) return (v)
#define NM_UTILS_LOOKUP_DEFAULT_WARN(v) g_return_val_if_reached (v)
#define NM_UTILS_LOOKUP_DEFAULT_NM_ASSERT(v) { nm_assert_not_reached (); return (v); }
#define NM_UTILS_LOOKUP_ITEM(v, n) (void) 0; case v: return (n); (void) 0
#define NM_UTILS_LOOKUP_STR_ITEM(v, n) NM_UTILS_LOOKUP_ITEM(v, ""n"")
#define NM_UTILS_LOOKUP_ITEM_IGNORE(v) (void) 0; case v: break; (void) 0
#define NM_UTILS_LOOKUP_ITEM_IGNORE_OTHER() (void) 0; default: break; (void) 0
#define _NM_UTILS_LOOKUP_DEFINE(scope, fcn_name, lookup_type, result_type, unknown_val, ...) \
scope result_type \
fcn_name (lookup_type val) \
{ \
switch (val) { \
(void) 0, \
__VA_ARGS__ \
(void) 0; \
}; \
{ unknown_val; } \
}
#define NM_UTILS_LOOKUP_STR_DEFINE(fcn_name, lookup_type, unknown_val, ...) \
_NM_UTILS_LOOKUP_DEFINE (, fcn_name, lookup_type, const char *, unknown_val, __VA_ARGS__)
#define NM_UTILS_LOOKUP_STR_DEFINE_STATIC(fcn_name, lookup_type, unknown_val, ...) \
_NM_UTILS_LOOKUP_DEFINE (static, fcn_name, lookup_type, const char *, unknown_val, __VA_ARGS__)
/* Call the string-lookup-table function @fcn_name. If the function returns
* %NULL, the numeric index is converted to string using a alloca() buffer.
* Beware: this macro uses alloca(). */
#define NM_UTILS_LOOKUP_STR(fcn_name, idx) \
({ \
typeof (idx) _idx = (idx); \
const char *_s; \
\
_s = fcn_name (_idx); \
if (!_s) { \
_s = g_alloca (30); \
\
g_snprintf ((char *) _s, 30, "(%lld)", (long long) _idx); \
} \
_s; \
})
/*****************************************************************************/
/* check if @flags has exactly one flag (@check) set. You should call this
* only with @check being a compile time constant and a power of two. */
#define NM_FLAGS_HAS(flags, check) \
( G_STATIC_ASSERT_EXPR ((check) > 0 && ((check) & ((check) - 1)) == 0), NM_FLAGS_ANY ((flags), (check)) )
#define NM_FLAGS_ANY(flags, check) ( ( ((flags) & (check)) != 0 ) ? TRUE : FALSE )
#define NM_FLAGS_ALL(flags, check) ( ( ((flags) & (check)) == (check) ) ? TRUE : FALSE )
#define NM_FLAGS_SET(flags, val) ({ \
const typeof(flags) _flags = (flags); \
const typeof(flags) _val = (val); \
\
_flags | _val; \
})
#define NM_FLAGS_UNSET(flags, val) ({ \
const typeof(flags) _flags = (flags); \
const typeof(flags) _val = (val); \
\
_flags & (~_val); \
})
#define NM_FLAGS_ASSIGN(flags, val, assign) ({ \
const typeof(flags) _flags = (flags); \
const typeof(flags) _val = (val); \
\
(assign) \
? _flags | (_val) \
: _flags & (~_val); \
})
/*****************************************************************************/
#define _NM_BACKPORT_SYMBOL_IMPL(VERSION, RETURN_TYPE, ORIG_FUNC, VERSIONED_FUNC, ARGS_TYPED, ARGS) \
RETURN_TYPE VERSIONED_FUNC ARGS_TYPED; \
RETURN_TYPE VERSIONED_FUNC ARGS_TYPED \
{ \
return ORIG_FUNC ARGS; \
} \
RETURN_TYPE ORIG_FUNC ARGS_TYPED; \
__asm__(".symver "G_STRINGIFY(VERSIONED_FUNC)", "G_STRINGIFY(ORIG_FUNC)"@"G_STRINGIFY(VERSION))
#define NM_BACKPORT_SYMBOL(VERSION, RETURN_TYPE, FUNC, ARGS_TYPED, ARGS) \
_NM_BACKPORT_SYMBOL_IMPL(VERSION, RETURN_TYPE, FUNC, _##FUNC##_##VERSION, ARGS_TYPED, ARGS)
/*****************************************************************************/
#define nm_str_skip_leading_spaces(str) \
({ \
typeof (*(str)) *_str = (str); \
_nm_unused const char *_str_type_check = _str; \
\
if (_str) { \
while (g_ascii_isspace (_str[0])) \
_str++; \
} \
_str; \
})
static inline char *
nm_strstrip (char *str)
{
/* g_strstrip doesn't like NULL. */
return str ? g_strstrip (str) : NULL;
}
/* g_ptr_array_sort()'s compare function takes pointers to the
* value. Thus, you cannot use strcmp directly. You can use
* nm_strcmp_p().
*
* Like strcmp(), this function is not forgiving to accept %NULL. */
static inline int
nm_strcmp_p (gconstpointer a, gconstpointer b)
{
const char *s1 = *((const char **) a);
const char *s2 = *((const char **) b);
return strcmp (s1, s2);
}
/* like nm_strcmp_p(), suitable for g_ptr_array_sort_with_data().
* g_ptr_array_sort() just casts nm_strcmp_p() to a function of different
* signature. I guess, in glib there are knowledgeable people that ensure
* that this additional argument doesn't cause problems due to different ABI
* for every architecture that glib supports.
* For NetworkManager, we'd rather avoid such stunts.
**/
static inline int
nm_strcmp_p_with_data (gconstpointer a, gconstpointer b, gpointer user_data)
{
const char *s1 = *((const char **) a);
const char *s2 = *((const char **) b);
return strcmp (s1, s2);
}
static inline int
nm_cmp_uint32_p_with_data (gconstpointer p_a, gconstpointer p_b, gpointer user_data)
{
const guint32 a = *((const guint32 *) p_a);
const guint32 b = *((const guint32 *) p_b);
if (a < b)
return -1;
if (a > b)
return 1;
return 0;
}
/*****************************************************************************/
/* Taken from systemd's UNIQ_T and UNIQ macros. */
#define NM_UNIQ_T(x, uniq) G_PASTE(__unique_prefix_, G_PASTE(x, uniq))
#define NM_UNIQ __COUNTER__
/*****************************************************************************/
/* glib's MIN()/MAX() macros don't have function-like behavior, in that they evaluate
* the argument possibly twice.
*
* Taken from systemd's MIN()/MAX() macros. */
#define NM_MIN(a, b) __NM_MIN(NM_UNIQ, a, NM_UNIQ, b)
#define __NM_MIN(aq, a, bq, b) \
({ \
typeof (a) NM_UNIQ_T(A, aq) = (a); \
typeof (b) NM_UNIQ_T(B, bq) = (b); \
((NM_UNIQ_T(A, aq) < NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \
})
#define NM_MAX(a, b) __NM_MAX(NM_UNIQ, a, NM_UNIQ, b)
#define __NM_MAX(aq, a, bq, b) \
({ \
typeof (a) NM_UNIQ_T(A, aq) = (a); \
typeof (b) NM_UNIQ_T(B, bq) = (b); \
((NM_UNIQ_T(A, aq) > NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \
})
#define NM_CLAMP(x, low, high) __NM_CLAMP(NM_UNIQ, x, NM_UNIQ, low, NM_UNIQ, high)
#define __NM_CLAMP(xq, x, lowq, low, highq, high) \
({ \
typeof(x)NM_UNIQ_T(X,xq) = (x); \
typeof(low) NM_UNIQ_T(LOW,lowq) = (low); \
typeof(high) NM_UNIQ_T(HIGH,highq) = (high); \
\
( (NM_UNIQ_T(X,xq) > NM_UNIQ_T(HIGH,highq)) \
? NM_UNIQ_T(HIGH,highq) \
: (NM_UNIQ_T(X,xq) < NM_UNIQ_T(LOW,lowq)) \
? NM_UNIQ_T(LOW,lowq) \
: NM_UNIQ_T(X,xq)); \
})
/*****************************************************************************/
static inline guint
nm_encode_version (guint major, guint minor, guint micro)
{
/* analog to the preprocessor macro NM_ENCODE_VERSION(). */
return (major << 16) | (minor << 8) | micro;
}
static inline void
nm_decode_version (guint version, guint *major, guint *minor, guint *micro)
{
*major = (version & 0xFFFF0000u) >> 16;
*minor = (version & 0x0000FF00u) >> 8;
*micro = (version & 0x000000FFu);
}
/*****************************************************************************/
/* taken from systemd's DECIMAL_STR_MAX()
*
* Returns the number of chars needed to format variables of the
* specified type as a decimal string. Adds in extra space for a
* negative '-' prefix (hence works correctly on signed
* types). Includes space for the trailing NUL. */
#define NM_DECIMAL_STR_MAX(type) \
(2+(sizeof(type) <= 1 ? 3 : \
sizeof(type) <= 2 ? 5 : \
sizeof(type) <= 4 ? 10 : \
sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
/*****************************************************************************/
/* if @str is NULL, return "(null)". Otherwise, allocate a buffer using
* alloca() of and fill it with @str. @str will be quoted with double quote.
* If @str is longer then @trunc_at, the string is truncated and the closing
* quote is instead '^' to indicate truncation.
*
* Thus, the maximum stack allocated buffer will be @trunc_at+3. */
#define nm_strquote_a(trunc_at, str) \
({ \
const char *const _str = (str); \
\
(_str \
? ({ \
const gsize _trunc_at = (trunc_at); \
const gsize _strlen_trunc = NM_MIN (strlen (_str), _trunc_at); \
char *_buf; \
\
_buf = g_alloca (_strlen_trunc + 3); \
_buf[0] = '"'; \
memcpy (&_buf[1], _str, _strlen_trunc); \
_buf[_strlen_trunc + 1] = _str[_strlen_trunc] ? '^' : '"'; \
_buf[_strlen_trunc + 2] = '\0'; \
_buf; \
}) \
: "(null)"); \
})
#define nm_sprintf_buf(buf, format, ...) \
({ \
char * _buf = (buf); \
int _buf_len; \
\
/* some static assert trying to ensure that the buffer is statically allocated.
* It disallows a buffer size of sizeof(gpointer) to catch that. */ \
G_STATIC_ASSERT (G_N_ELEMENTS (buf) == sizeof (buf) && sizeof (buf) != sizeof (char *)); \
_buf_len = g_snprintf (_buf, sizeof (buf), \
""format"", ##__VA_ARGS__); \
nm_assert (_buf_len < sizeof (buf)); \
_buf; \
})
#define nm_sprintf_bufa(n_elements, format, ...) \
({ \
char *_buf; \
int _buf_len; \
typeof (n_elements) _n_elements = (n_elements); \
\
_buf = g_alloca (_n_elements); \
_buf_len = g_snprintf (_buf, _n_elements, \
""format"", ##__VA_ARGS__); \
nm_assert (_buf_len < _n_elements); \
_buf; \
})
/*****************************************************************************/
/**
* The boolean type _Bool is C99 while we mostly stick to C89. However, _Bool is too
* convinient to miss and is effectively available in gcc and clang. So, just use it.
*
* Usually, one would include "stdbool.h" to get the "bool" define which aliases
* _Bool. We provide this define here, because we want to make use of it anywhere.
* (also, stdbool.h is again C99).
*
* Using _Bool has advantages over gboolean:
*
* - commonly _Bool is one byte large, instead of gboolean's 4 bytes (because gboolean
* is a typedef for gint). Especially when having boolean fields in a struct, we can
* thereby easily save some space.
*
* - _Bool type guarantees that two "true" expressions compare equal. E.g. the follwing
* will not work:
* gboolean v1 = 1;
* gboolean v2 = 2;
* g_assert_cmpint (v1, ==, v2); // will fail
* For that, we often to use !! to coerce gboolean values to 0 or 1:
* g_assert_cmpint (!!v2, ==, TRUE);
* With _Bool type, this will be handled properly by the compiler.
*
* - For structs, we might want to safe even more space and use bitfields:
* struct s1 {
* gboolean v1:1;
* };
* But the problem here is that gboolean is signed, so that
* v1 will be either 0 or -1 (not 1, TRUE). Thus, the following
* fails:
* struct s1 s = { .v1 = TRUE, };
* g_assert_cmpint (s1.v1, ==, TRUE);
* It will however work just fine with bool/_Bool while retaining the
* notion of having a boolean value.
*
* Also, add the defines for "true" and "false". Those are nicely highlighted by the editor
* as special types, contrary to glib's "TRUE"/"FALSE".
*/
#ifndef bool
#define bool _Bool
#define true 1
#define false 0
#endif
#ifdef _G_BOOLEAN_EXPR
/* g_assert() uses G_LIKELY(), which in turn uses _G_BOOLEAN_EXPR().
* As glib's implementation uses a local variable _g_boolean_var_,
* we cannot do
* g_assert (some_macro ());
* where some_macro() itself expands to ({g_assert(); ...}).
* In other words, you cannot have a g_assert() inside a g_assert()
* without getting a -Werror=shadow failure.
*
* Workaround that by re-defining _G_BOOLEAN_EXPR()
**/
#undef _G_BOOLEAN_EXPR
#define __NM_G_BOOLEAN_EXPR_IMPL(v, expr) \
({ \
int NM_UNIQ_T(V, v); \
\
if (expr) \
NM_UNIQ_T(V, v) = 1; \
else \
NM_UNIQ_T(V, v) = 0; \
NM_UNIQ_T(V, v); \
})
#define _G_BOOLEAN_EXPR(expr) __NM_G_BOOLEAN_EXPR_IMPL (NM_UNIQ, expr)
#endif
/*****************************************************************************/
#endif /* __NM_MACROS_INTERNAL_H__ */