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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2009-2011. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Author: Rickard Green
*/
#define ETHR_EVENT_OFF_WAITER__ ((ethr_sint32_t) -1)
#define ETHR_EVENT_OFF__ ((ethr_sint32_t) 1)
#define ETHR_EVENT_ON__ ((ethr_sint32_t) 0)
typedef struct {
ethr_atomic32_t 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 */
ethr_sint32_t state = ethr_atomic32_xchg_wb(&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)
{
ethr_atomic32_set(&e->state, ETHR_EVENT_OFF__);
ETHR_MEMORY_BARRIER;
}
#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);
int ethr_event_twait(ethr_event *e, ethr_sint64_t timeout);
int ethr_event_stwait(ethr_event *e, int spincount, ethr_sint64_t timeout);
#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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