www.pudn.com > zlIP-8051-rtl8019as.zip > TCPIPmem.h

/* 
 * 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  
 * 
 */ 
 
/* 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;