| /******************************************************************************** |
| * include/mqueue.h |
| * |
| * Copyright (C) 2007, 2008 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. |
| * |
| ********************************************************************************/ |
| |
| #ifndef __INCLUDE_MQUEUE_H |
| #define __INCLUDE_MQUEUE_H |
| |
| /******************************************************************************** |
| * Included Files |
| ********************************************************************************/ |
| |
| #include <sys/types.h> |
| #include <signal.h> |
| #include "queue.h" |
| |
| /******************************************************************************** |
| * Pre-processor Definitions |
| ********************************************************************************/ |
| |
| #define MQ_NONBLOCK O_NONBLOCK |
| |
| /******************************************************************************** |
| * Public 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 */ |
| }; |
| |
| /* Message queue descriptor */ |
| |
| typedef FAR struct mq_des *mqd_t; |
| |
| /******************************************************************************** |
| * Public Data |
| ********************************************************************************/ |
| |
| #ifdef __cplusplus |
| #define EXTERN extern "C" |
| extern "C" |
| { |
| #else |
| #define EXTERN extern |
| #endif |
| |
| /******************************************************************************** |
| * Public Function Prototypes |
| ********************************************************************************/ |
| |
| mqd_t mq_open(FAR const char *mq_name, int oflags, ...); |
| int mq_close(mqd_t mqdes ); |
| int mq_unlink(FAR const char *mq_name); |
| int mq_send(mqd_t mqdes, FAR const char *msg, size_t msglen, |
| unsigned int prio); |
| int mq_timedsend(mqd_t mqdes, FAR const char *msg, size_t msglen, |
| unsigned int prio, FAR const struct timespec *abstime); |
| ssize_t mq_receive(mqd_t mqdes, FAR char *msg, size_t msglen, |
| FAR unsigned int *prio); |
| ssize_t mq_timedreceive(mqd_t mqdes, FAR char *msg, size_t msglen, |
| FAR unsigned int *prio, |
| FAR const struct timespec *abstime); |
| int mq_notify(mqd_t mqdes, const struct sigevent *notification); |
| int mq_setattr(mqd_t mqdes, FAR const struct mq_attr *mq_stat, |
| FAR struct mq_attr *oldstat); |
| int mq_getattr(mqd_t mqdes, FAR struct mq_attr *mq_stat); |
| |
| #undef EXTERN |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* __INCLUDE_MQUEUE_H */ |