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/****************************************************************************
* sched/mqueue/mq_desclose.c
*
* Copyright (C) 2007, 2009, 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <mqueue.h>
#include <sched.h>
#include <assert.h>
#include <queue.h>
#include <nuttx/mqueue.h>
#include "mqueue/mqueue.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Declarations
****************************************************************************/
/****************************************************************************
* Global Variables
****************************************************************************/
/****************************************************************************
* Private Variables
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: mq_desfree
*
* Description:
* Deallocate a message queue descriptor but returning it to the free list
*
* Inputs:
* mqdes - message queue descriptor to free
*
****************************************************************************/
#define mq_desfree(mqdes) sq_addlast((FAR sq_entry_t*)mqdes, &g_desfree)
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: mq_close
*
* Description:
* This function performs the portion of the mq_close operation related
* to freeing resource used by the message queue descriptor itself.
*
* Parameters:
* mqdes - Message queue descriptor.
*
* Return Value:
* None.
*
* Assumptions:
* - Called only from mq_close() with the scheduler locked.
*
****************************************************************************/
void mq_desclose(mqd_t mqdes)
{
FAR struct tcb_s *rtcb = (FAR struct tcb_s*)sched_self();
FAR struct task_group_s *group = rtcb->group;
FAR struct mqueue_inode_s *msgq;
DEBUGASSERT(mqdes && group);
/* Remove the message descriptor from the current task's list of message
* descriptors.
*/
sq_rem((FAR sq_entry_t*)mqdes, &group->tg_msgdesq);
/* Find the message queue associated with the message descriptor */
msgq = mqdes->msgq;
/* Check if the calling task has a notification attached to the message
* queue via this mqdes.
*/
#ifndef CONFIG_DISABLE_SIGNALS
if (msgq->ntmqdes == mqdes)
{
msgq->ntpid = INVALID_PROCESS_ID;
msgq->ntsigno = 0;
msgq->ntvalue.sival_int = 0;
msgq->ntmqdes = NULL;
}
#endif
/* Deallocate the message descriptor */
mq_desfree(mqdes);
}
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