1 /****************************************************************************
2 * drivers/bch/bchlib_sem.c
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership. The
7 * ASF licenses this file to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance with the
9 * License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
16 * License for the specific language governing permissions and limitations
17 * under the License.
18 *
19 ****************************************************************************/
20
21 /****************************************************************************
22 * Included Files
23 ****************************************************************************/
24 #include <errno.h>
25 #include <assert.h>
26 #include <semaphore.h>
27 #include "bch.h"
28
29 /****************************************************************************
30 * Public Functions
31 ****************************************************************************/
32
33 /****************************************************************************
34 * Name: bch_semtake
35 ****************************************************************************/
36
bchlib_semtake(struct bchlib_s * bch)37 void bchlib_semtake(struct bchlib_s *bch)
38 {
39 while (sem_wait(&bch->sem) != 0)
40 {
41 /* The only case that an error should occur here is if the wait was
42 * awakened by a signal.
43 */
44
45 LOS_ASSERT(get_errno() == EINTR);
46 }
47 }
48