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-rw-r--r--erts/emulator/sys/win32/erl_poll.c8
-rw-r--r--erts/emulator/sys/win32/erl_win_dyn_driver.h2
2 files changed, 7 insertions, 3 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
diff --git a/erts/emulator/sys/win32/erl_win_dyn_driver.h b/erts/emulator/sys/win32/erl_win_dyn_driver.h
index 1347eead91..ecb06868d5 100644
--- a/erts/emulator/sys/win32/erl_win_dyn_driver.h
+++ b/erts/emulator/sys/win32/erl_win_dyn_driver.h
@@ -1,7 +1,7 @@
/*
* %CopyrightBegin%
*
- * Copyright Ericsson AB 2003-2009. All Rights Reserved.
+ * Copyright Ericsson AB 2003-2011. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in