diff options
| author | Agustina Arzille <avarzille@riseup.net> | 2017-05-05 04:01:13 -1000 |
|---|---|---|
| committer | Richard Braun <rbraun@sceen.net> | 2017-05-09 21:17:58 +0200 |
| commit | bcbe8dc991a9ec63f30d50ed4cca89fd9e6b7ff7 (patch) | |
| tree | 389517510b8d19082d02f36453dbf68356b548fb /kern/sref.c | |
| parent | b5864f82b9c0d8ea2e825e7d86bd8cdeb825f870 (diff) | |
Replace sequential consistency with more efficient orders
Diffstat (limited to 'kern/sref.c')
| -rw-r--r-- | kern/sref.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kern/sref.c b/kern/sref.c index 9ce7a83..3f399a3 100644 --- a/kern/sref.c +++ b/kern/sref.c @@ -259,13 +259,13 @@ sref_weakref_init(struct sref_weakref *weakref, struct sref_counter *counter) static void sref_weakref_mark_dying(struct sref_weakref *weakref) { - atomic_or(&weakref->addr, SREF_WEAKREF_DYING, ATOMIC_SEQ_CST); + atomic_or_acq_rel(&weakref->addr, SREF_WEAKREF_DYING); } static void sref_weakref_clear_dying(struct sref_weakref *weakref) { - atomic_and(&weakref->addr, SREF_WEAKREF_MASK, ATOMIC_SEQ_CST); + atomic_and_acq_rel(&weakref->addr, SREF_WEAKREF_MASK); } static int @@ -274,7 +274,7 @@ sref_weakref_kill(struct sref_weakref *weakref) uintptr_t addr, oldval; addr = weakref->addr | SREF_WEAKREF_DYING; - oldval = atomic_cas_seq_cst(&weakref->addr, addr, (uintptr_t)NULL); + oldval = atomic_cas_release(&weakref->addr, addr, (uintptr_t)NULL); if (oldval != addr) { assert((oldval & SREF_WEAKREF_MASK) == (addr & SREF_WEAKREF_MASK)); @@ -292,7 +292,7 @@ sref_weakref_tryget(struct sref_weakref *weakref) do { addr = weakref->addr; newval = addr & SREF_WEAKREF_MASK; - oldval = atomic_cas_seq_cst(&weakref->addr, addr, newval); + oldval = atomic_cas_acquire(&weakref->addr, addr, newval); } while (oldval != addr); return (struct sref_counter *)newval; |