sapi/src/chaingetwait.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSAPIClassicChains
0007  *
0008  * @brief This source file contains the implementation of
0009  *   rtems_chain_get_with_wait().
0010  */
0011
0012 /*
0013  * Copyright (c) 2010 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/chain.h>
0042
0043 rtems_status_code rtems_chain_get_with_wait(
0044   rtems_chain_control *chain,
0045   rtems_event_set events,
0046   rtems_interval timeout,
0047   rtems_chain_node **node_ptr
0048 )
0049 {
0050   rtems_status_code sc = RTEMS_SUCCESSFUL;
0051   rtems_chain_node *node = NULL;
0052
0053   while (
0054     sc == RTEMS_SUCCESSFUL
0055       && (node = rtems_chain_get( chain )) == NULL
0056   ) {
0057     rtems_event_set out;
0058     sc = rtems_event_receive(
0059       events,
0060       RTEMS_EVENT_ALL | RTEMS_WAIT,
0061       timeout,
0062       &out
0063     );
0064   }
0065
0066   *node_ptr = node;
0067
0068   return sc;
0069 }