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shared: inline fast-path for hash _get_hash_key()

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This commit is contained in:
Thomas Haller 2017-11-16 11:40:19 +01:00
parent 6fbd280b35
commit 3751cceeec
1 changed files with 13 additions and 2 deletions
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15
shared/nm-utils/nm-hash-utils.c
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@ -35,10 +35,11 @@
G_STATIC_ASSERT (sizeof (guint) * HASH_KEY_SIZE_GUINT >= HASH_KEY_SIZE); G_STATIC_ASSERT (sizeof (guint) * HASH_KEY_SIZE_GUINT >= HASH_KEY_SIZE);
static const guint8 *volatile global_seed = NULL;
static const guint8 * static const guint8 *
_get_hash_key (void) _get_hash_key_init (void)
{ {
static const guint8 *volatile global_seed = NULL;
/* the returned hash is aligned to guin64, hence, it is safe /* the returned hash is aligned to guin64, hence, it is safe
* to use it as guint* or guint64* pointer. */ * to use it as guint* or guint64* pointer. */
static union { static union {
@ -80,6 +81,16 @@ _get_hash_key (void)
return g_arr.v8; return g_arr.v8;
} }
#define _get_hash_key() \
({ \
const guint8 *_g; \
\
_g = global_seed; \
if (G_UNLIKELY (_g == NULL)) \
_g = _get_hash_key_init (); \
_g; \
})
guint guint
nm_hash_static (guint static_seed) nm_hash_static (guint static_seed)
{ {