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shared: add nm_malloc_maybe_a(), nm_malloc0_maybe_a() and nm_memdup_maybe_a() utils

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Thomas Haller 2019-05-03 08:32:20 +02:00
parent 4ed72fa658
commit 945620624a
1 changed files with 55 additions and 0 deletions
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55
shared/nm-glib-aux/nm-macros-internal.h
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@ -1531,6 +1531,61 @@ nm_memdup (gconstpointer data, gsize size)
return p;
}
#define nm_malloc_maybe_a(alloca_maxlen, bytes, to_free) \
({ \
const gsize _bytes = (bytes); \
gpointer _ptr; \
typeof (to_free) _to_free = (to_free); \
\
G_STATIC_ASSERT_EXPR ((alloca_maxlen) <= 500); \
nm_assert (_to_free && !*_to_free); \
\
if (_bytes <= (alloca_maxlen)) { \
_ptr = g_alloca (_bytes); \
} else { \
_ptr = g_malloc (_bytes); \
*_to_free = _ptr; \
}; \
\
_ptr; \
})
#define nm_malloc0_maybe_a(alloca_maxlen, bytes, to_free) \
({ \
const gsize _bytes = (bytes); \
gpointer _ptr; \
typeof (to_free) _to_free = (to_free); \
\
G_STATIC_ASSERT_EXPR ((alloca_maxlen) <= 500); \
nm_assert (_to_free && !*_to_free); \
\
if (_bytes <= (alloca_maxlen)) { \
_ptr = g_alloca (_bytes); \
memset (_ptr, 0, _bytes); \
} else { \
_ptr = g_malloc0 (_bytes); \
*_to_free = _ptr; \
}; \
\
_ptr; \
})
#define nm_memdup_maybe_a(alloca_maxlen, data, size, to_free) \
({ \
const gsize _size = (size); \
gpointer _ptr_md = NULL; \
typeof (to_free) _to_free_md = (to_free); \
\
nm_assert (_to_free_md && !*_to_free_md); \
\
if (_size > 0u) { \
_ptr_md = nm_malloc_maybe_a ((alloca_maxlen), _size, _to_free_md); \
memcpy (_ptr_md, (data), _size); \
} \
\
_ptr_md; \
})
static inline char *
_nm_strndup_a_step (char *s, const char *str, gsize len)
{