tcpipmem.h

51单片机实现网页显示功能

/*
 * Copyright (c) 2003 Electric Application Laboratory of NAN KAI University
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * Author: Li Zhanglin <http://www.zlmcu.com>
 *
 */

/* mem manage especial for TCPIP packet */

#define TCPIP_BUF_SIZE	0x2000

/* use pNext and pPre mem blocks are linked in chain */
struct SMemHead
{
	struct SMemHead DT_XDATA *pNext;	/* next mem block */
	struct SMemHead DT_XDATA *pPre;	/* previous mem block */
	BOOL used;				/* if in using */
	BYTE DT_XDATA *pStart;			/* the start address of valid data */
	BYTE DT_XDATA *pEnd;
};

void MemInit() REENTRANT_MUL;
struct SMemHead DT_XDATA *MemAllocate(WORD size) REENTRANT_SIG;
void MemFree(struct SMemHead DT_XDATA * MemHead) REENTRANT_SIG;
WORD MemFreeSize() REENTRANT_SIG;