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183 lines
6.2 KiB
183 lines
6.2 KiB
/**************************************************************************** |
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* sched/mq_internal.h |
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* |
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* Copyright (C) 2007, 2009, 2011 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 __SCHED_MQ_INTERNAL_H |
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#define __SCHED_MQ_INTERNAL_H |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <nuttx/compiler.h> |
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#include <sys/types.h> |
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#include <stdint.h> |
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#include <stdbool.h> |
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#include <limits.h> |
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#include <mqueue.h> |
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#include <sched.h> |
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#include <signal.h> |
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#include <nuttx/mqueue.h> |
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#if CONFIG_MQ_MAXMSGSIZE > 0 |
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/**************************************************************************** |
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* Definitions |
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****************************************************************************/ |
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#define MQ_MAX_BYTES CONFIG_MQ_MAXMSGSIZE |
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#define MQ_MAX_MSGS 16 |
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#define MQ_PRIO_MAX _POSIX_MQ_PRIO_MAX |
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/* This defines the number of messages descriptors to allocate at each |
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* "gulp." |
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*/ |
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#define NUM_MSG_DESCRIPTORS 24 |
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/* This defines the number of messages to set aside for exclusive use by |
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* interrupt handlers |
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*/ |
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#define NUM_INTERRUPT_MSGS 8 |
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/**************************************************************************** |
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* Global Type Declarations |
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****************************************************************************/ |
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enum mqalloc_e |
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{ |
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MQ_ALLOC_FIXED = 0, /* pre-allocated; never freed */ |
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MQ_ALLOC_DYN, /* dynamically allocated; free when unused */ |
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MQ_ALLOC_IRQ /* Preallocated, reserved for interrupt handling */ |
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}; |
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typedef enum mqalloc_e mqalloc_t; |
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/* This structure describes one buffered POSIX message. */ |
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struct mqmsg |
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{ |
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FAR struct mqmsg *next; /* Forward link to next message */ |
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uint8_t type; /* (Used to manage allocations) */ |
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uint8_t priority; /* priority of message */ |
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#if MQ_MAX_BYTES < 256 |
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uint8_t msglen; /* Message data length */ |
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#else |
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uint16_t msglen; /* Message data length */ |
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#endif |
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uint8_t mail[MQ_MAX_BYTES]; /* Message data */ |
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}; |
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typedef struct mqmsg mqmsg_t; |
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/**************************************************************************** |
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* Global Variables |
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****************************************************************************/ |
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/* This is a list of all opened message queues */ |
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extern sq_queue_t g_msgqueues; |
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/* The g_msgfree is a list of messages that are available for general use. |
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* The number of messages in this list is a system configuration item. |
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*/ |
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extern sq_queue_t g_msgfree; |
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/* The g_msgfreeInt is a list of messages that are reserved for use by |
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* interrupt handlers. |
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*/ |
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extern sq_queue_t g_msgfreeirq; |
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/* The g_desfree data structure is a list of message descriptors available |
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* to the operating system for general use. The number of messages in the |
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* pool is a constant. |
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*/ |
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extern sq_queue_t g_desfree; |
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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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/* Functions defined in mq_initialize.c ************************************/ |
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EXTERN void weak_function mq_initialize(void); |
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EXTERN void mq_desblockalloc(void); |
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EXTERN mqd_t mq_descreate(FAR _TCB* mtcb, FAR msgq_t* msgq, int oflags); |
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EXTERN FAR msgq_t *mq_findnamed(const char *mq_name); |
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EXTERN void mq_msgfree(FAR mqmsg_t *mqmsg); |
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EXTERN void mq_msgqfree(FAR msgq_t *msgq); |
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/* mq_waitirq.c ************************************************************/ |
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EXTERN void mq_waitirq(FAR _TCB *wtcb, int errcode); |
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/* mq_rcvinternal.c ********************************************************/ |
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EXTERN int mq_verifyreceive(mqd_t mqdes, void *msg, size_t msglen); |
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EXTERN FAR mqmsg_t *mq_waitreceive(mqd_t mqdes); |
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EXTERN ssize_t mq_doreceive(mqd_t mqdes, mqmsg_t *mqmsg, void *ubuffer, |
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int *prio); |
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/* mq_sndinternal.c ********************************************************/ |
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EXTERN int mq_verifysend(mqd_t mqdes, const void *msg, size_t msglen, |
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int prio); |
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EXTERN FAR mqmsg_t *mq_msgalloc(void); |
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EXTERN int mq_waitsend(mqd_t mqdes); |
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EXTERN int mq_dosend(mqd_t mqdes, FAR mqmsg_t *mqmsg, const void *msg, |
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size_t msglen, int prio); |
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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 /* CONFIG_MQ_MAXMSGSIZE > 0 */ |
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#endif /* __SCHED_MQ_INTERNAL_H */ |
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