01207cc66e
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@338 42af7a65-404d-4744-a932-0658087f49c3
114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/************************************************************
|
|
* mq_getattr.c
|
|
*
|
|
* Copyright (C) 2007 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* 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 Gregory Nutt 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 <sys/types.h> /* uint32, etc. */
|
|
#include <stdarg.h> /* va_list */
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <mqueue.h>
|
|
#include <sched.h>
|
|
#include <debug.h>
|
|
#include <nuttx/kmalloc.h>
|
|
#include <nuttx/arch.h>
|
|
#include "os_internal.h"
|
|
#include "sig_internal.h"
|
|
#include "mq_internal.h"
|
|
|
|
/************************************************************
|
|
* Definitions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Type Declarations
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Global Variables
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Variables
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Private Functions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Public Functions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Function: mq_getattr
|
|
*
|
|
* Description:
|
|
* This functions gets status information and attributes
|
|
* associated with the specified message queue.
|
|
*
|
|
* Parameters:
|
|
* mqdes - Message queue descriptor
|
|
* mq_stat - Buffer in which to return attributes
|
|
*
|
|
* Return Value:
|
|
* 0 (OK) if attributes provided, -1 (ERROR) otherwise.
|
|
*
|
|
* Assumptions:
|
|
*
|
|
************************************************************/
|
|
|
|
int mq_getattr(mqd_t mqdes, struct mq_attr *mq_stat)
|
|
{
|
|
int ret = ERROR;
|
|
|
|
if (mqdes && mq_stat)
|
|
{
|
|
/* Return the attributes */
|
|
|
|
mq_stat->mq_maxmsg = mqdes->msgq->maxmsgs;
|
|
mq_stat->mq_msgsize = mqdes->msgq->maxmsgsize;
|
|
mq_stat->mq_flags = mqdes->oflags;
|
|
mq_stat->mq_curmsgs = mqdes->msgq->nmsgs;
|
|
|
|
ret = OK;
|
|
}
|
|
|
|
return ret;
|
|
}
|