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109 lines
4.4 KiB
109 lines
4.4 KiB
/******************************************************************************** |
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* include/mqueue.h |
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* |
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* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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********************************************************************************/ |
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#ifndef __INCLUDE_MQUEUE_H |
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#define __INCLUDE_MQUEUE_H |
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/******************************************************************************** |
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* Included Files |
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********************************************************************************/ |
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#include <sys/types.h> |
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#include <signal.h> |
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#include "queue.h" |
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/******************************************************************************** |
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* Compilations Switches |
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********************************************************************************/ |
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/******************************************************************************** |
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* Definitions |
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********************************************************************************/ |
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#define MQ_NONBLOCK O_NONBLOCK |
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/******************************************************************************** |
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* Global Type Declarations |
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********************************************************************************/ |
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/* Message queue attributes */ |
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struct mq_attr |
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{ |
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size_t mq_maxmsg; /* Max number of messages in queue */ |
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size_t mq_msgsize; /* Max message size */ |
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unsigned mq_flags; /* Queue flags */ |
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size_t mq_curmsgs; /* Number of messages currently in queue */ |
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}; |
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/* Message queue descriptor */ |
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typedef FAR struct mq_des *mqd_t; |
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/******************************************************************************** |
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* Global Variables |
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********************************************************************************/ |
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/******************************************************************************** |
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* Global Function Prototypes |
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********************************************************************************/ |
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#ifdef __cplusplus |
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#define EXTERN extern "C" |
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extern "C" { |
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#else |
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#define EXTERN extern |
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#endif |
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EXTERN mqd_t mq_open(const char *mq_name, int oflags, ...); |
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EXTERN int mq_close(mqd_t mqdes ); |
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EXTERN int mq_unlink(const char *mq_name); |
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EXTERN int mq_send(mqd_t mqdes, const void *msg, size_t msglen, int prio); |
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EXTERN int mq_timedsend(mqd_t mqdes, const char *msg, size_t msglen, int prio, |
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const struct timespec *abstime); |
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EXTERN ssize_t mq_receive(mqd_t mqdes, void *msg, size_t msglen, int *prio); |
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EXTERN ssize_t mq_timedreceive(mqd_t mqdes, void *msg, size_t msglen, |
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int *prio, const struct timespec *abstime); |
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EXTERN int mq_notify(mqd_t mqdes, const struct sigevent *notification); |
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EXTERN int mq_setattr(mqd_t mqdes, const struct mq_attr *mq_stat, |
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struct mq_attr *oldstat); |
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EXTERN int mq_getattr(mqd_t mqdes, struct mq_attr *mq_stat); |
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#undef EXTERN |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* __INCLUDE_MQUEUE_H */
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