119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2006, Swedish Institute of Computer Science.
|
|
* All rights reserved.
|
|
*
|
|
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* $Id: queuebuf.c,v 1.3 2007/03/15 09:56:39 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* A brief description of what this file is.
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include "net/rime/queuebuf.h"
|
|
|
|
#include <string.h> /* for memcpy() */
|
|
|
|
#define QUEUEBUF_NUM 2
|
|
#define QUEUEBUF_REF_NUM 2
|
|
|
|
struct queuebuf {
|
|
u16_t len;
|
|
u8_t data[RIMEBUF_SIZE + RIMEBUF_HDR_SIZE];
|
|
};
|
|
|
|
struct queuebuf_ref {
|
|
u16_t len;
|
|
u8_t *ref;
|
|
u8_t hdr[RIMEBUF_HDR_SIZE];
|
|
u8_t hdrlen;
|
|
};
|
|
|
|
MEMB(bufmem, struct queuebuf, QUEUEBUF_NUM);
|
|
MEMB(refbufmem, struct queuebuf_ref, QUEUEBUF_REF_NUM);
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
queuebuf_init(void)
|
|
{
|
|
memb_init(&bufmem);
|
|
memb_init(&refbufmem);
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
struct queuebuf *
|
|
queuebuf_new_from_rimebuf(void)
|
|
{
|
|
struct queuebuf *buf;
|
|
struct queuebuf_ref *rbuf;
|
|
|
|
if(rimebuf_is_reference()) {
|
|
rbuf = memb_alloc(&refbufmem);
|
|
if(rbuf != NULL) {
|
|
rbuf->len = rimebuf_datalen();
|
|
rbuf->ref = rimebuf_reference_ptr();
|
|
rbuf->hdrlen = rimebuf_copyto_hdr(rbuf->hdr);
|
|
}
|
|
return (struct queuebuf *)rbuf;
|
|
} else {
|
|
buf = memb_alloc(&bufmem);
|
|
if(buf != NULL) {
|
|
buf->len = rimebuf_copyto(buf->data);
|
|
}
|
|
return buf;
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
queuebuf_free(struct queuebuf *buf)
|
|
{
|
|
if(memb_inmemb(&bufmem, buf)) {
|
|
memb_free(&bufmem, buf);
|
|
} else if(memb_inmemb(&refbufmem, buf)) {
|
|
memb_free(&refbufmem, buf);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
queuebuf_to_rimebuf(struct queuebuf *b)
|
|
{
|
|
struct queuebuf_ref *r;
|
|
|
|
if(memb_inmemb(&bufmem, b)) {
|
|
rimebuf_copyfrom(b->data, b->len);
|
|
} else if(memb_inmemb(&refbufmem, b)) {
|
|
r = (struct queuebuf_ref *)b;
|
|
rimebuf_clear();
|
|
rimebuf_copyfrom(r->ref, r->len);
|
|
rimebuf_hdrextend(r->hdrlen);
|
|
memcpy(rimebuf_hdrptr(), r->hdr, r->hdrlen);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|