diff options
Diffstat (limited to 'erts/emulator/sys/win32')
| -rw-r--r-- | erts/emulator/sys/win32/erl_poll.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/erts/emulator/sys/win32/erl_poll.c b/erts/emulator/sys/win32/erl_poll.c index 1f2877b682..7662f190ef 100644 --- a/erts/emulator/sys/win32/erl_poll.c +++ b/erts/emulator/sys/win32/erl_poll.c @@ -452,12 +452,15 @@ poll_wait_timeout(ErtsPollSet ps, SysTimeval *tvp) static ERTS_INLINE void wake_poller(ErtsPollSet ps, int io_ready) { - erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state); + erts_aint32_t wakeup_state; if (io_ready) { /* We may set the event multiple times. This is, however, harmless. */ - erts_atomic32_set(&ps->wakeup_state, ERTS_POLL_WOKEN_IO_READY); + wakeup_state = erts_atomic32_read(&ps->wakeup_state); + erts_atomic32_set_relb(&ps->wakeup_state, ERTS_POLL_WOKEN_IO_READY); } else { + ERTS_THR_MEMORY_BARRIER; + wakeup_state = erts_atomic32_read(&ps->wakeup_state); while (wakeup_state != ERTS_POLL_WOKEN_IO_READY && wakeup_state != ERTS_POLL_WOKEN_INTR) { erts_aint32_t act = erts_atomic32_cmpxchg(&ps->wakeup_state, @@ -518,6 +521,7 @@ reset_interrupt(ErtsPollSet ps) break; wakeup_state = act; } + ERTS_THR_MEMORY_BARRIER; } static ERTS_INLINE void |