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Diffstat (limited to 'nuttx/include/mqueue.h')
-rw-r--r-- | nuttx/include/mqueue.h | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/nuttx/include/mqueue.h b/nuttx/include/mqueue.h new file mode 100644 index 000000000..67dd5842d --- /dev/null +++ b/nuttx/include/mqueue.h @@ -0,0 +1,109 @@ +/******************************************************************************** + * 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" + +/******************************************************************************** + * Compilations Switches + ********************************************************************************/ + +/******************************************************************************** + * Definitions + ********************************************************************************/ + +#define MQ_NONBLOCK O_NONBLOCK + +/******************************************************************************** + * 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 */ +}; + +/* 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_timedsend(mqd_t mqdes, const char *msg, size_t msglen, int prio, + const struct timespec *abstime); +EXTERN ssize_t mq_receive(mqd_t mqdes, void *msg, size_t msglen, int *prio); +EXTERN ssize_t mq_timedreceive(mqd_t mqdes, void *msg, size_t msglen, + int *prio, const struct timespec *abstime); +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 /* __INCLUDE_MQUEUE_H */ |