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/*
* Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved.
* Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
* Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <complib/cl_event.h>
#include <complib/cl_debug.h>
#include <sys/time.h>
#include <sys/errno.h>
void cl_event_construct(IN cl_event_t * p_event)
{
CL_ASSERT(p_event);
p_event->state = CL_UNINITIALIZED;
}
cl_status_t
cl_event_init(IN cl_event_t * const p_event, IN const boolean_t manual_reset)
{
CL_ASSERT(p_event);
cl_event_construct(p_event);
pthread_cond_init(&p_event->condvar, NULL);
pthread_mutex_init(&p_event->mutex, NULL);
p_event->signaled = FALSE;
p_event->manual_reset = manual_reset;
p_event->state = CL_INITIALIZED;
return (CL_SUCCESS);
}
void cl_event_destroy(IN cl_event_t * const p_event)
{
CL_ASSERT(cl_is_state_valid(p_event->state));
/* Destroy only if the event was constructed */
if (p_event->state == CL_INITIALIZED) {
pthread_cond_broadcast(&p_event->condvar);
pthread_cond_destroy(&p_event->condvar);
pthread_mutex_destroy(&p_event->mutex);
}
p_event->state = CL_UNINITIALIZED;
}
cl_status_t cl_event_signal(IN cl_event_t * const p_event)
{
/* Make sure that the event was started */
CL_ASSERT(p_event->state == CL_INITIALIZED);
pthread_mutex_lock(&p_event->mutex);
p_event->signaled = TRUE;
/* Wake up one or all depending on whether the event is auto-resetting. */
if (p_event->manual_reset)
pthread_cond_broadcast(&p_event->condvar);
else
pthread_cond_signal(&p_event->condvar);
pthread_mutex_unlock(&p_event->mutex);
return (CL_SUCCESS);
}
cl_status_t cl_event_reset(IN cl_event_t * const p_event)
{
/* Make sure that the event was started */
CL_ASSERT(p_event->state == CL_INITIALIZED);
pthread_mutex_lock(&p_event->mutex);
p_event->signaled = FALSE;
pthread_mutex_unlock(&p_event->mutex);
return (CL_SUCCESS);
}
cl_status_t
cl_event_wait_on(IN cl_event_t * const p_event,
IN const uint32_t wait_us, IN const boolean_t interruptible)
{
cl_status_t status;
int wait_ret;
struct timespec timeout;
struct timeval curtime;
/* Make sure that the event was Started */
CL_ASSERT(p_event->state == CL_INITIALIZED);
pthread_mutex_lock(&p_event->mutex);
/* Return immediately if the event is signalled. */
if (p_event->signaled) {
if (!p_event->manual_reset)
p_event->signaled = FALSE;
pthread_mutex_unlock(&p_event->mutex);
return (CL_SUCCESS);
}
/* If just testing the state, return CL_TIMEOUT. */
if (wait_us == 0) {
pthread_mutex_unlock(&p_event->mutex);
return (CL_TIMEOUT);
}
if (wait_us == EVENT_NO_TIMEOUT) {
/* Wait for condition variable to be signaled or broadcast. */
if (pthread_cond_wait
(&p_event->condvar, &p_event->mutex))
status = CL_NOT_DONE;
else
status = CL_SUCCESS;
} else {
/* Get the current time */
if (gettimeofday(&curtime, NULL) == 0) {
timeout.tv_sec = curtime.tv_sec + (wait_us / 1000000);
timeout.tv_nsec =
(curtime.tv_usec + (wait_us % 1000000)) * 1000;
wait_ret = pthread_cond_timedwait(&p_event->condvar,
&p_event->mutex,
&timeout);
if (wait_ret == 0)
status =
(p_event->
signaled ? CL_SUCCESS : CL_NOT_DONE);
else if (wait_ret == ETIMEDOUT)
status = CL_TIMEOUT;
else
status = CL_NOT_DONE;
} else {
status = CL_ERROR;
}
}
if (!p_event->manual_reset)
p_event->signaled = FALSE;
pthread_mutex_unlock(&p_event->mutex);
return (status);
}
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