/*
We initialise the hashes for deadlock detection lazily.
This greatly helps with performance when lots of mutexes are initiased but
only a few of them are actually used (eg. XtraDB).
*/
static int safe_mutex_lazy_init_deadlock_detection(safe_mutex_t *mp)
{
if (!my_multi_malloc(MY_FAE | MY_WME,
&mp->locked_mutex, sizeof(*mp->locked_mutex),
&mp->used_mutex, sizeof(*mp->used_mutex), NullS))
{
/* Disable deadlock handling for this mutex */
mp->create_flags|= MYF_NO_DEADLOCK_DETECTION;
mp->active_flags|= MYF_NO_DEADLOCK_DETECTION;
return 1; /* Error */
}
pthread_mutex_lock(&THR_LOCK_mutex);
mp->id= ++safe_mutex_id;
pthread_mutex_unlock(&THR_LOCK_mutex);
my_hash_init2(mp->locked_mutex, 64, &my_charset_bin,
128,
offsetof(safe_mutex_deadlock_t, id),
sizeof(mp->id),
0, 0, 0, HASH_UNIQUE);
my_hash_init2(mp->used_mutex, 64, &my_charset_bin,
128,
offsetof(safe_mutex_t, id),
sizeof(mp->id),
0, 0, 0, HASH_UNIQUE);
return 0;
}
HashMap(ulong initial_size = 1024, uint grow_size = 256) {
assert(my_init_done);
if (my_hash_init2(&m_hash,
grow_size,
&my_charset_bin, // charset
initial_size, // default_array_elements
0, // key_offset
sizeof(K), // key_length
G == HashMap__get_key ? NULL : _get_key, // get_key,
free_element, // free_element
HASH_UNIQUE, // flags
PSI_INSTRUMENT_ME
))
abort();
}
