f63db66382
Change-Id: Ida12f5938388cca2f233a4cde90277a218033645 Signed-off-by: ligd <liguiding1@xiaomi.com>
134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/****************************************************************************
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* sched/mqueue/mq_setattr.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <fcntl.h> /* O_NONBLOCK */
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#include <mqueue.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/mqueue.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: file_mq_setattr
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*
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* Description:
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* This function sets the attributes associated with the
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* specified message queue "mq". Only the "O_NONBLOCK"
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* bit of the "mq_flags" can be changed.
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*
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* If "oldstat" is non-null, mq_setattr() will store the
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* previous message queue attributes at that location (just
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* as would have been returned by file_mq_getattr()).
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*
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* Input Parameters:
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* mq - Message queue descriptor
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* mq_stat - New attributes
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* oldstate - Old attributes
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*
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* Returned Value:
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* This is an internal OS interface and should not be used by applications.
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* It follows the NuttX internal error return policy: Zero (OK) is
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* returned on success. A negated errno value is returned on failure.
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*
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* Assumptions:
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*
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****************************************************************************/
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int file_mq_setattr(FAR struct file *mq, FAR const struct mq_attr *mq_stat,
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FAR struct mq_attr *oldstat)
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{
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if (!mq || !mq_stat)
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{
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return -EINVAL;
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}
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/* Return the attributes if so requested */
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if (oldstat)
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{
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file_mq_getattr(mq, oldstat);
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}
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/* Set the new value of the O_NONBLOCK flag. */
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mq->f_oflags = ((mq_stat->mq_flags & O_NONBLOCK) |
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(mq->f_oflags & (~O_NONBLOCK)));
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return 0;
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}
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/****************************************************************************
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* Name: mq_setattr
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*
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* Description:
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* This function sets the attributes associated with the
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* specified message queue "mqdes." Only the "O_NONBLOCK"
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* bit of the "mq_flags" can be changed.
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*
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* If "oldstat" is non-null, mq_setattr() will store the
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* previous message queue attributes at that location (just
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* as would have been returned by mq_getattr()).
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*
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* Input Parameters:
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* mqdes - Message queue descriptor
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* mq_stat - New attributes
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* oldstate - Old attributes
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*
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* Returned Value:
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* 0 (OK) if attributes are set successfully, otherwise
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* -1 (ERROR).
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*
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* Assumptions:
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*
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****************************************************************************/
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int mq_setattr(mqd_t mqdes, const struct mq_attr *mq_stat,
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struct mq_attr *oldstat)
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{
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FAR struct file *filep;
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int ret;
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ret = fs_getfilep(mqdes, &filep);
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if (ret < 0)
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{
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set_errno(-ret);
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return ERROR;
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}
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ret = file_mq_setattr(filep, mq_stat, oldstat);
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if (ret < 0)
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{
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set_errno(-ret);
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return ERROR;
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}
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return OK;
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}
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