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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2009-2010. 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
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
/*
* Author: Rickard Green
*/
#define ETHR_EVENT_OFF_WAITER__ ((long) -1)
#define ETHR_EVENT_OFF__ ((long) 1)
#define ETHR_EVENT_ON__ ((long) 0)
typedef struct {
volatile long state;
HANDLE handle;
} ethr_event;
#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
#pragma intrinsic(_InterlockedExchange)
static ETHR_INLINE void
ETHR_INLINE_FUNC_NAME_(ethr_event_set)(ethr_event *e)
{
/* _InterlockedExchange() imply a full memory barrier which is important */
long state = _InterlockedExchange(&e->state, ETHR_EVENT_ON__);
if (state == ETHR_EVENT_OFF_WAITER__) {
if (!SetEvent(e->handle))
ETHR_FATAL_ERROR__(ethr_win_get_errno__());
}
}
static ETHR_INLINE void
ETHR_INLINE_FUNC_NAME_(ethr_event_reset)(ethr_event *e)
{
/* _InterlockedExchange() imply a full memory barrier which is important */
InterlockedExchange(&e->state, ETHR_EVENT_OFF__);
}
#endif
int ethr_event_init(ethr_event *e);
int ethr_event_destroy(ethr_event *e);
int ethr_event_wait(ethr_event *e);
int ethr_event_swait(ethr_event *e, int spincount);
#if !defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
void ethr_event_set(ethr_event *e);
void ethr_event_reset(ethr_event *e);
#endif
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