129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/****************************************************************************
|
|
* include/nuttx/mqueue.h
|
|
*
|
|
* Copyright (C) 2007, 2009, 2011 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_NUTTX_MQUEUE_H
|
|
#define ___INCLUDE_NUTTX_MQUEUE_H
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <nuttx/compiler.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <mqueue.h>
|
|
#include <queue.h>
|
|
#include <signal.h>
|
|
|
|
#if CONFIG_MQ_MAXMSGSIZE > 0
|
|
|
|
/****************************************************************************
|
|
* Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Global Type Declarations
|
|
****************************************************************************/
|
|
|
|
/* This structure defines a message queue */
|
|
|
|
struct mq_des; /* forward reference */
|
|
|
|
struct msgq_s
|
|
{
|
|
FAR struct msgq_s *flink; /* Forward link to next message queue */
|
|
sq_queue_t msglist; /* Prioritized message list */
|
|
int16_t maxmsgs; /* Maximum number of messages in the queue */
|
|
int16_t nmsgs; /* Number of message in the queue */
|
|
int16_t nconnect; /* Number of connections to message queue */
|
|
int16_t nwaitnotfull; /* Number tasks waiting for not full */
|
|
int16_t nwaitnotempty; /* Number tasks waiting for not empty */
|
|
#if CONFIG_MQ_MAXMSGSIZE < 256
|
|
uint8_t maxmsgsize; /* Max size of message in message queue */
|
|
#else
|
|
uint16_t maxmsgsize; /* Max size of message in message queue */
|
|
#endif
|
|
bool unlinked; /* true if the msg queue has been unlinked */
|
|
#ifndef CONFIG_DISABLE_SIGNALS
|
|
FAR struct mq_des *ntmqdes; /* Notification: Owning mqdes (NULL if none) */
|
|
pid_t ntpid; /* Notification: Receiving Task's PID */
|
|
int ntsigno; /* Notification: Signal number */
|
|
union sigval ntvalue; /* Notification: Signal value */
|
|
#endif
|
|
char name[1]; /* Start of the queue name */
|
|
};
|
|
|
|
typedef struct msgq_s msgq_t;
|
|
|
|
#define SIZEOF_MQ_HEADER ((int)(((msgq_t*)NULL)->name))
|
|
|
|
/* This describes the message queue descriptor that is held in the
|
|
* task's TCB
|
|
*/
|
|
|
|
struct mq_des
|
|
{
|
|
FAR struct mq_des *flink; /* Forward link to next message descriptor */
|
|
FAR msgq_t *msgq; /* Pointer to associated message queue */
|
|
int oflags; /* Flags set when message queue was opened */
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Global Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Global Function Prototypes
|
|
****************************************************************************/
|
|
|
|
#ifdef __cplusplus
|
|
#define EXTERN extern "C"
|
|
extern "C" {
|
|
#else
|
|
#define EXTERN extern
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_MQ_MAXMSGSIZE > 0 */
|
|
#endif /* ___INCLUDE_NUTTX_MQUEUE_H */
|
|
|