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Implement malloc_mutex_trylock() w/ proper stats update.

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This commit is contained in:
Qi Wang 2017-04-21 15:05:43 -07:00 • committed by Qi Wang
parent af76f0e5d2
commit f970c497dc
3 changed files with 36 additions and 14 deletions
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4
src/mutex.c
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@ -81,7 +81,7 @@ malloc_mutex_lock_slow(malloc_mutex_t *mutex) {
int cnt = 0, max_cnt = MALLOC_MUTEX_MAX_SPIN;
do {
CPU_SPINWAIT;
if (!malloc_mutex_trylock(mutex)) {
if (!malloc_mutex_trylock_final(mutex)) {
data->n_spin_acquired++;
return;
}
@ -100,7 +100,7 @@ label_spin_done:
uint32_t n_thds = atomic_fetch_add_u32(&data->n_waiting_thds, 1,
ATOMIC_RELAXED) + 1;
/* One last try as above two calls may take quite some cycles. */
if (!malloc_mutex_trylock(mutex)) {
if (!malloc_mutex_trylock_final(mutex)) {
atomic_fetch_sub_u32(&data->n_waiting_thds, 1, ATOMIC_RELAXED);
data->n_spin_acquired++;
return;