2 * FreeRTOS Kernel V10.5.0
3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * SPDX-License-Identifier: MIT
7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
8 * this software and associated documentation files (the "Software"), to deal in
9 * the Software without restriction, including without limitation the rights to
10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
11 * the Software, and to permit persons to whom the Software is furnished to do so,
12 * subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in all
15 * copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 * https://www.FreeRTOS.org
25 * https://github.com/FreeRTOS
33 #include "wait_for_event.h"
37 pthread_mutex_t mutex;
42 struct event * event_create( void )
44 struct event * ev = malloc( sizeof( struct event ) );
46 ev->event_triggered = false;
47 pthread_mutex_init( &ev->mutex, NULL );
48 pthread_cond_init( &ev->cond, NULL );
52 void event_delete( struct event * ev )
54 pthread_mutex_destroy( &ev->mutex );
55 pthread_cond_destroy( &ev->cond );
59 bool event_wait( struct event * ev )
61 pthread_mutex_lock( &ev->mutex );
63 while( ev->event_triggered == false )
65 pthread_cond_wait( &ev->cond, &ev->mutex );
68 ev->event_triggered = false;
69 pthread_mutex_unlock( &ev->mutex );
72 bool event_wait_timed( struct event * ev,
78 clock_gettime( CLOCK_REALTIME, &ts );
79 ts.tv_sec += ms / 1000;
80 ts.tv_nsec += ((ms % 1000) * 1000000);
81 pthread_mutex_lock( &ev->mutex );
83 while( (ev->event_triggered == false) && (ret == 0) )
85 ret = pthread_cond_timedwait( &ev->cond, &ev->mutex, &ts );
87 if( ( ret == -1 ) && ( errno == ETIMEDOUT ) )
93 ev->event_triggered = false;
94 pthread_mutex_unlock( &ev->mutex );
98 void event_signal( struct event * ev )
100 pthread_mutex_lock( &ev->mutex );
101 ev->event_triggered = true;
102 pthread_cond_signal( &ev->cond );
103 pthread_mutex_unlock( &ev->mutex );