a60059d9d0
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@20 42af7a65-404d-4744-a932-0658087f49c3
120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
/************************************************************
|
|
* mqueue.h
|
|
*
|
|
* 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.
|
|
*
|
|
************************************************************/
|
|
|
|
#ifndef __MQUEUE_H
|
|
#define __MQUEUE_H
|
|
|
|
/************************************************************
|
|
* Included Files
|
|
************************************************************/
|
|
|
|
#include <sys/types.h>
|
|
#include <signal.h>
|
|
#include "queue.h"
|
|
|
|
/************************************************************
|
|
* Compilations Switches
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Definitions
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Global Type Declarations
|
|
************************************************************/
|
|
|
|
/* Message queue attributes */
|
|
|
|
struct mq_attr
|
|
{
|
|
size_t mq_maxmsg; /* Max number of messages in queue */
|
|
size_t mq_msgsize; /* Max message size */
|
|
unsigned mq_flags; /* Queue flags */
|
|
size_t mq_curmsgs; /* Number of messages currently in queue */
|
|
};
|
|
|
|
/* The following is used to attach a signal to a message queue
|
|
* to notify a task when a message is available on a queue
|
|
*/
|
|
|
|
struct sigevent {
|
|
int sigev_signo;
|
|
union sigval sigev_value;
|
|
int sigev_notify;
|
|
};
|
|
|
|
/* Message queue descriptor */
|
|
|
|
typedef FAR struct mq_des *mqd_t;
|
|
|
|
/************************************************************
|
|
* Global Variables
|
|
************************************************************/
|
|
|
|
/************************************************************
|
|
* Global Function Prototypes
|
|
************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C" {
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
EXTERN mqd_t mq_open(const char *mq_name, int oflags, ... );
|
|
EXTERN int mq_close(mqd_t mqdes );
|
|
EXTERN int mq_unlink(const char *mq_name );
|
|
EXTERN int mq_send(mqd_t mqdes, const void *msg,
|
|
size_t msglen, int prio );
|
|
EXTERN int mq_receive(mqd_t mqdes, void *msg,
|
|
size_t msglen, int *prio );
|
|
EXTERN int mq_notify(mqd_t mqdes,
|
|
const struct sigevent *notification );
|
|
EXTERN int mq_setattr(mqd_t mqdes,
|
|
const struct mq_attr *mq_stat,
|
|
struct mq_attr *oldstat);
|
|
EXTERN int mq_getattr(mqd_t mqdes,
|
|
struct mq_attr *mq_stat);
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __MQUEUE_H */
|
|
|