94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
/****************************************************************************
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* include/mqueue.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MQ_NONBLOCK O_NONBLOCK
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/****************************************************************************
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* Public 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 int mqd_t;
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/****************************************************************************
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* Public Data
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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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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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mqd_t mq_open(FAR const char *mq_name, int oflags, ...);
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int mq_close(mqd_t mqdes);
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int mq_unlink(FAR const char *mq_name);
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int mq_send(mqd_t mqdes, FAR const char *msg, size_t msglen,
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unsigned int prio);
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int mq_timedsend(mqd_t mqdes, FAR const char *msg, size_t msglen,
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unsigned int prio, FAR const struct timespec *abstime);
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ssize_t mq_receive(mqd_t mqdes, FAR char *msg, size_t msglen,
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FAR unsigned int *prio);
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ssize_t mq_timedreceive(mqd_t mqdes, FAR char *msg, size_t msglen,
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FAR unsigned int *prio,
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FAR const struct timespec *abstime);
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int mq_notify(mqd_t mqdes, FAR const struct sigevent *notification);
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int mq_setattr(mqd_t mqdes, FAR const struct mq_attr *mq_stat,
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FAR struct mq_attr *oldstat);
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int mq_getattr(mqd_t mqdes, FAR 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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