tcpipmem.h

51单片机下的RTL8019网络芯片的驱动程序

/*
 */

/* 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 xdata *pNext;	/* next mem block */
	struct SMemHead xdata *pPre;	        /* previous mem block */
	unsigned char used;				/* if in using */
	unsigned char xdata *pStart;			/* the start address of valid data */
	unsigned char xdata *pEnd;
};

void MemInit() reentrant;
struct SMemHead xdata *MemAllocate(unsigned int size) reentrant;
void MemFree(struct SMemHead xdata * MemHead) reentrant;
unsigned int MemFreeSize() reentrant;