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-rw-r--r--erts/emulator/sys/common/erl_poll.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c
index 884c403da4..21fa214364 100644
--- a/erts/emulator/sys/common/erl_poll.c
+++ b/erts/emulator/sys/common/erl_poll.c
@@ -431,7 +431,7 @@ static ERTS_INLINE int
is_interrupted_reset(ErtsPollSet ps)
{
#if defined(USE_THREADS) || ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
- return (erts_atomic32_xchg_nob(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN)
+ return (erts_atomic32_xchg_acqb(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN)
== ERTS_POLL_WOKEN_INTR);
#else
return 0;
@@ -442,7 +442,7 @@ static ERTS_INLINE void
woke_up(ErtsPollSet ps)
{
#if defined(USE_THREADS) || ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
- erts_aint32_t wakeup_state = erts_atomic32_read_nob(&ps->wakeup_state);
+ erts_aint32_t wakeup_state = erts_atomic32_read_acqb(&ps->wakeup_state);
if (wakeup_state == ERTS_POLL_NOT_WOKEN)
(void) erts_atomic32_cmpxchg_nob(&ps->wakeup_state,
ERTS_POLL_WOKEN,
@@ -469,14 +469,9 @@ wake_poller(ErtsPollSet ps, int interrupted, int async_signal_safe)
wakeup_state = erts_atomic32_cmpxchg_relb(&ps->wakeup_state,
ERTS_POLL_WOKEN,
ERTS_POLL_NOT_WOKEN);
- else {
- /*
- * We might unnecessarily write to the pipe, however,
- * that isn't problematic.
- */
- wakeup_state = erts_atomic32_read_nob(&ps->wakeup_state);
- erts_atomic32_set_relb(&ps->wakeup_state, ERTS_POLL_WOKEN_INTR);
- }
+ else
+ wakeup_state = erts_atomic32_xchg_relb(&ps->wakeup_state,
+ ERTS_POLL_WOKEN_INTR);
wake = wakeup_state == ERTS_POLL_NOT_WOKEN;
}
/*