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/*
* FreeRTOS Kernel V10.5.0
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* 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.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
#include <pthread.h>
#include <stdlib.h>
#include <errno.h>
#include "wait_for_event.h"
struct event
{
pthread_mutex_t mutex;
pthread_cond_t cond;
bool event_triggered;
};
struct event * event_create( void )
{
struct event * ev = malloc( sizeof( struct event ) );
ev->event_triggered = false;
pthread_mutex_init( &ev->mutex, NULL );
pthread_cond_init( &ev->cond, NULL );
return ev;
}
void event_delete( struct event * ev )
{
pthread_mutex_destroy( &ev->mutex );
pthread_cond_destroy( &ev->cond );
free( ev );
}
bool event_wait( struct event * ev )
{
pthread_mutex_lock( &ev->mutex );
while( ev->event_triggered == false )
{
pthread_cond_wait( &ev->cond, &ev->mutex );
}
ev->event_triggered = false;
pthread_mutex_unlock( &ev->mutex );
return true;
}
bool event_wait_timed( struct event * ev,
time_t ms )
{
struct timespec ts;
int ret = 0;
clock_gettime( CLOCK_REALTIME, &ts );
ts.tv_sec += ms / 1000;
ts.tv_nsec += ((ms % 1000) * 1000000);
pthread_mutex_lock( &ev->mutex );
while( (ev->event_triggered == false) && (ret == 0) )
{
ret = pthread_cond_timedwait( &ev->cond, &ev->mutex, &ts );
if( ( ret == -1 ) && ( errno == ETIMEDOUT ) )
{
return false;
}
}
ev->event_triggered = false;
pthread_mutex_unlock( &ev->mutex );
return true;
}
void event_signal( struct event * ev )
{
pthread_mutex_lock( &ev->mutex );
ev->event_triggered = true;
pthread_cond_signal( &ev->cond );
pthread_mutex_unlock( &ev->mutex );
}
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