128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/****************************************************************************
|
|
* sched/mqueue/mq_initialize.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <nuttx/kmalloc.h>
|
|
#include <nuttx/trace.h>
|
|
|
|
#include "mqueue/mqueue.h"
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/* The g_msgfree is a list of messages that are available for general
|
|
* use. The number of messages in this list is a system configuration
|
|
* item.
|
|
*/
|
|
|
|
struct list_node g_msgfree = LIST_INITIAL_VALUE(g_msgfree);
|
|
|
|
/* The g_msgfreeInt is a list of messages that are reserved for use by
|
|
* interrupt handlers.
|
|
*/
|
|
|
|
struct list_node g_msgfreeirq = LIST_INITIAL_VALUE(g_msgfreeirq);
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: mq_msgblockalloc
|
|
*
|
|
* Description:
|
|
* Allocate a block of messages and place them on the free list.
|
|
*
|
|
* Input Parameters:
|
|
* queue
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void
|
|
mq_msgblockalloc(FAR struct list_node *list, uint16_t nmsgs,
|
|
uint8_t alloc_type)
|
|
{
|
|
FAR struct mqueue_msg_s *mqmsgblock;
|
|
|
|
/* The list must be loaded at initialization time to hold the
|
|
* configured number of messages.
|
|
*/
|
|
|
|
mqmsgblock = (FAR struct mqueue_msg_s *)
|
|
kmm_malloc(sizeof(struct mqueue_msg_s) * nmsgs);
|
|
|
|
if (mqmsgblock)
|
|
{
|
|
int i;
|
|
for (i = 0; i < nmsgs; i++)
|
|
{
|
|
mqmsgblock->type = alloc_type;
|
|
list_add_tail(list, &mqmsgblock->node);
|
|
mqmsgblock++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nxmq_initialize
|
|
*
|
|
* Description:
|
|
* This function initializes the message system. This function must
|
|
* be called early in the initialization sequence before any of the
|
|
* other message interfaces execute.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
void nxmq_initialize(void)
|
|
{
|
|
sched_trace_begin();
|
|
|
|
/* Allocate a block of messages for general use */
|
|
|
|
mq_msgblockalloc(&g_msgfree, CONFIG_PREALLOC_MQ_MSGS,
|
|
MQ_ALLOC_FIXED);
|
|
|
|
/* Allocate a block of messages for use exclusively by
|
|
* interrupt handlers
|
|
*/
|
|
|
|
mq_msgblockalloc(&g_msgfreeirq, CONFIG_PREALLOC_MQ_IRQ_MSGS,
|
|
MQ_ALLOC_IRQ);
|
|
|
|
sched_trace_end();
|
|
}
|