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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2008 - 2018 Red Hat, Inc.
*/
#ifndef __NM_GLIB_H__
#define __NM_GLIB_H__
/*****************************************************************************/
#ifndef __NM_MACROS_INTERNAL_H__
#error "nm-glib.h requires nm-macros-internal.h. Do not include this directly"
#endif
/*****************************************************************************/
#ifdef __clang__
#undef G_GNUC_BEGIN_IGNORE_DEPRECATIONS
#undef G_GNUC_END_IGNORE_DEPRECATIONS
#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")
#endif
/*****************************************************************************/
/* glib 2.58+ defines an improved, type-safe variant of g_clear_pointer(). Reimplement
* that.
*
* Note that we also have nm_clear_pointer() which is similar to g_clear_pointer()
* and also preferred throughout. However, we do use g_clear_object(), which is
* implemented via g_clear_pointer(). So while there are no immediate users of
* g_clear_pointer() (use nm_clear_pointer() instead), there are indirect users
* via g_clear_object().
*
* Anyway. So the glib 2.58+ version of g_clear_pointer() is only used if GLIB_VERSION_MAX_ALLOWED
* is set, which we don't do.
*
* To get the type-safe variant, reimplement g_clear_pointer() below. This aims to
* be identical to the version of the macro in glib 2.58.
*
* Still, don't use g_clear_pointer() directly (use nm_clear_pointer()). This compat
* implementation exists only for g_clear_object().
*/
#undef g_clear_pointer
#define g_clear_pointer(pp, destroy) \
G_STMT_START \
{ \
typeof((pp)) _pp = (pp); \
typeof(*_pp) _ptr = *_pp; \
\
G_STATIC_ASSERT(sizeof *(pp) == sizeof(gpointer)); \
\
*_pp = NULL; \
if (_ptr) \
(destroy)(_ptr); \
} \
G_STMT_END
/*****************************************************************************/
/* g_assert_cmpmem() is only available since glib 2.46. */
#if !GLIB_CHECK_VERSION(2, 45, 7)
#define g_assert_cmpmem(m1, l1, m2, l2) \
G_STMT_START \
{ \
gconstpointer __m1 = m1, __m2 = m2; \
int __l1 = l1, __l2 = l2; \
if (__l1 != __l2) \
g_assertion_message_cmpnum(G_LOG_DOMAIN, \
__FILE__, \
__LINE__, \
G_STRFUNC, \
#l1 " (len(" #m1 ")) == " #l2 " (len(" #m2 "))", \
__l1, \
"==", \
__l2, \
'i'); \
else if (memcmp(__m1, __m2, __l1) != 0) \
g_assertion_message(G_LOG_DOMAIN, \
__FILE__, \
__LINE__, \
G_STRFUNC, \
"assertion failed (" #m1 " == " #m2 ")"); \
} \
G_STMT_END
#endif
/*****************************************************************************/
/* Rumtime check for glib version. First do a compile time check which
* (if satisfied) shortcuts the runtime check. */
static inline gboolean
nm_glib_check_version(guint major, guint minor, guint micro)
{
return GLIB_CHECK_VERSION(major, minor, micro)
|| ((glib_major_version > major)
|| (glib_major_version == major && glib_minor_version > minor)
|| (glib_major_version == major && glib_minor_version == minor
&& glib_micro_version < micro));
}
/*****************************************************************************/
#if !GLIB_CHECK_VERSION(2, 54, 0)
static inline gboolean
g_ptr_array_find(GPtrArray *haystack, gconstpointer needle, guint *index_)
{
guint i;
g_return_val_if_fail(haystack, FALSE);
for (i = 0; i < haystack->len; i++) {
if (haystack->pdata[i] == needle) {
if (index_)
*index_ = i;
return TRUE;
}
}
return FALSE;
}
#else
#define g_ptr_array_find(haystack, needle, index_) \
({ \
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
g_ptr_array_find(haystack, needle, index_); \
G_GNUC_END_IGNORE_DEPRECATIONS \
})
#endif
/*****************************************************************************/
#ifdef g_steal_pointer
#undef g_steal_pointer
#endif
#define g_steal_pointer(pp) \
({ \
typeof(*(pp)) *const _pp = (pp); \
typeof(*_pp) _p = *_pp; \
\
_NM_ENSURE_POINTER(_p); \
\
*_pp = NULL; \
_p; \
})
/*****************************************************************************/
static inline gboolean
_nm_g_strv_contains(const char *const *strv, const char *str)
{
#if !GLIB_CHECK_VERSION(2, 44, 0)
g_return_val_if_fail(strv != NULL, FALSE);
g_return_val_if_fail(str != NULL, FALSE);
for (; *strv != NULL; strv++) {
if (g_str_equal(str, *strv))
return TRUE;
}
return FALSE;
#else
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
return g_strv_contains(strv, str);
G_GNUC_END_IGNORE_DEPRECATIONS
#endif
}
#define g_strv_contains _nm_g_strv_contains
/*****************************************************************************/
/* Recent glib also casts the results to typeof(Obj), but only if
*
* ( defined(g_has_typeof) && GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_56 )
*
* Since we build NetworkManager with older GLIB_VERSION_MAX_ALLOWED, it's
* not taking effect.
*
* Override this. */
#undef g_object_ref
#undef g_object_ref_sink
#define g_object_ref(Obj) ((typeof(Obj)) g_object_ref(Obj))
#define g_object_ref_sink(Obj) ((typeof(Obj)) g_object_ref_sink(Obj))
/*****************************************************************************/
#ifndef g_autofree
/* we still don't rely on recent glib to provide g_autofree. Hence, we continue
* to use our gs_* free macros that we took from libgsystem.
*
* To ease migration towards g_auto*, add a compat define for g_autofree. */
#define g_autofree gs_free
#endif
/*****************************************************************************/
#if !GLIB_CHECK_VERSION(2, 47, 1)
/* Older versions of g_value_unset() only allowed to unset a GValue which
* was initialized previously. This was relaxed ([1], [2], [3]).
*
* Our nm_auto_unset_gvalue macro requires to be able to call g_value_unset().
* Also, it is our general practice to allow for that. Add a compat implementation.
*
* [1] https://gitlab.gnome.org/GNOME/glib/commit/4b2d92a864f1505f1b08eb639d74293fa32681da
* [2] commit "Allow passing unset GValues to g_value_unset()"
* [3] https://bugzilla.gnome.org/show_bug.cgi?id=755766
*/
static inline void
_nm_g_value_unset(GValue *value)
{
g_return_if_fail(value);
if (value->g_type != 0)
g_value_unset(value);
}
#define g_value_unset _nm_g_value_unset
#endif
/* G_PID_FORMAT was added only in 2.53.5. Define it ourself.
*
* If this was about "pid_t", we would check SIZEOF_PID_T, and set
* PRIi32/PRIi16, like systemd does. But it's actually about
* GPid, which glib typedefs as an "int".
*
* There is a test_gpid() that check that GPid is really a typedef
* for int. */
#undef G_PID_FORMAT
#define G_PID_FORMAT "i"
/*****************************************************************************/
/* G_SOURCE_FUNC was added in 2.57.2. */
#undef G_SOURCE_FUNC
#define G_SOURCE_FUNC(f) ((GSourceFunc) (void (*)(void))(f))
/*****************************************************************************/
/* g_atomic_pointer_get() is implemented as a macro, and it is also used for
* (gsize *) arguments. However, that leads to compiler warnings in certain
* configurations. Work around it, by redefining the macro. */
static inline gpointer
_g_atomic_pointer_get(void **atomic)
{
return g_atomic_pointer_get(atomic);
}
#undef g_atomic_pointer_get
#define g_atomic_pointer_get(atomic) \
({ \
typeof(*atomic) *const _atomic = (atomic); \
\
/* g_atomic_pointer_get() is used by glib also for (gsize *) pointers,
* not only pointers to pointers. We thus don't enforce that (*atomic)
* is a pointer, but of suitable size/alignment. */ \
\
G_STATIC_ASSERT(sizeof(*_atomic) == sizeof(gpointer)); \
G_STATIC_ASSERT(_nm_alignof(*_atomic) == _nm_alignof(gpointer)); \
(void) (0 ? (gpointer) * (_atomic) : NULL); \
\
(typeof(*_atomic)) _g_atomic_pointer_get((void **) _atomic); \
})
/* Reimplement g_atomic_pointer_set() macro too. Our variant does more type
* checks. */
static inline void
_g_atomic_pointer_set(void **atomic, void *newval)
{
return g_atomic_pointer_set(atomic, newval);
}
#undef g_atomic_pointer_set
#define g_atomic_pointer_set(atomic, newval) \
({ \
typeof(*atomic) *const _atomic = (atomic); \
typeof(*_atomic) const _newval = (newval); \
_nm_unused gconstpointer const _val_type_check = _newval; \
\
(void) (0 ? (gpointer) * (_atomic) : NULL); \
\
_g_atomic_pointer_set((void **) _atomic, (void *) _newval); \
})
/* Glib implements g_atomic_pointer_compare_and_exchange() as a macro.
* For one, to inline the atomic operation and also to perform some type checks
* on the arguments.
* Depending on compiler and glib version, glib passes the arguments as they
* are to __atomic_compare_exchange_n(). Some clang version don't accept const
* pointers there. Reimplement the macro to get that right, but with stronger
* type checks (as we use typeof()). Had one job. */
static inline gboolean
_g_atomic_pointer_compare_and_exchange(void **atomic, void *oldval, void *newval)
{
return g_atomic_pointer_compare_and_exchange(atomic, oldval, newval);
}
#undef g_atomic_pointer_compare_and_exchange
#define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \
({ \
typeof(*atomic) *const _atomic = (atomic); \
typeof(*_atomic) const _oldval = (oldval); \
typeof(*_atomic) const _newval = (newval); \
_nm_unused gconstpointer const _val_type_check = _oldval; \
\
(void) (0 ? (gpointer) * (_atomic) : NULL); \
\
_g_atomic_pointer_compare_and_exchange((void **) _atomic, \
(void *) _oldval, \
(void *) _newval); \
})
/*****************************************************************************/
#if !GLIB_CHECK_VERSION(2, 58, 0)
static inline gboolean
g_hash_table_steal_extended(GHashTable *hash_table,
gconstpointer lookup_key,
gpointer *stolen_key,
gpointer *stolen_value)
{
g_assert(stolen_key);
g_assert(stolen_value);
if (g_hash_table_lookup_extended(hash_table, lookup_key, stolen_key, stolen_value)) {
g_hash_table_steal(hash_table, lookup_key);
return TRUE;
}
*stolen_key = NULL;
*stolen_value = NULL;
return FALSE;
}
#else
#define g_hash_table_steal_extended(hash_table, lookup_key, stolen_key, stolen_value) \
({ \
gpointer *_stolen_key = (stolen_key); \
gpointer *_stolen_value = (stolen_value); \
\
/* we cannot allow NULL arguments, because then we would leak the values in
* the compat implementation. */ \
g_assert(_stolen_key); \
g_assert(_stolen_value); \
\
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
g_hash_table_steal_extended(hash_table, lookup_key, _stolen_key, _stolen_value); \
G_GNUC_END_IGNORE_DEPRECATIONS \
})
#endif
/*****************************************************************************/
_nm_deprecated("Don't use this API") void _nm_forbidden_glib_api_0(void);
_nm_deprecated("Don't use this API") void _nm_forbidden_glib_api_n(gconstpointer arg0, ...);
#undef g_cancellable_reset
#define g_cancellable_reset(cancellable) _nm_forbidden_glib_api_n(cancellable)
#undef g_idle_remove_by_data
#define g_idle_remove_by_data(data) _nm_forbidden_glib_api_n(data)
#undef g_source_remove_by_funcs_user_data
#define g_source_remove_by_funcs_user_data(funcs, user_data) \
_nm_forbidden_glib_api_n(funcs, user_data)
#undef g_source_remove_by_user_data
#define g_source_remove_by_user_data(user_data) _nm_forbidden_glib_api_n(user_data)
/*****************************************************************************/
/* Coverity gets confused by g_strstrip(g_strdup(foo)). Reimplement the macro
* in a way that hopefully works better to avoid the false positive. */
#undef g_strstrip
#define g_strstrip(str) \
({ \
char *const _str = (str); \
\
g_strchug(_str); \
g_strchomp(_str); \
_str; \
})
/*****************************************************************************/
/* g_alloca0() evaluates the "size" argument multiple times. That seems an error
* prone API (as it's not function-like).
*
* We could fix it by using an expression statement. But it doesn't seem
* worth it, so hide it to prevent its use. */
#undef g_alloca0
#undef g_newa0
/*****************************************************************************/
/* Use either NM_MIN()/NM_MAX() or (if that doesn't work) use NM_MIN_CONST()/NM_MAX_CONST(). */
#undef MIN
#undef MAX
/*****************************************************************************/
#endif /* __NM_GLIB_H__ */
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