memp.h

一个单片机实现以太网通信的程序

/*
 * Copyright (c) 2001-2003 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. 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.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <[e-mail]>
 *
 */

#ifndef __LWIP_MEMP_H__
#define __LWIP_MEMP_H__

#include "lwip/opt.h"

typedef enum {
  MEMP_PBUF,
#if LWIP_UDP  
  MEMP_UDP_PCB,
#endif
#if LWIP_TCP  
  MEMP_TCP_PCB,
  MEMP_TCP_PCB_LISTEN,
  MEMP_TCP_SEG,
#endif  
#if (NO_SYS!=1)
  MEMP_NETBUF,
  MEMP_NETCONN,
  MEMP_API_MSG,
  MEMP_TCPIP_MSG,

  MEMP_SYS_TIMEOUT,
#endif  
  MEMP_MAX
} memp_t;

struct memp {
  struct memp *next;
};

void memp_init(void);

void *memp_malloc(memp_t type);
void *memp_realloc(memp_t fromtype, memp_t totype, void *mem);
void memp_free(memp_t type, void *mem);

void *memp_mallocp(memp_t type);
void memp_freep(memp_t type, void *mem);

#ifdef CONFIGURABLE

#ifdef MAIN                      // for user, not lib maker
const u16_t memp_num[MEMP_MAX]= {
  PBUF_NUM,
#if LWIP_UDP  
  UDP_NUM,
#endif
#if LWIP_TCP  
  TCP_NUM,
  LTCP_NUM,
  TCP_SEG_NUM,
#endif  
#if (NO_SYS !=1)  
  MEMP_NUM_NETBUF,
  MEMP_NUM_NETCONN,
  MEMP_NUM_API_MSG,
  MEMP_NUM_TCPIP_MSG,
  MEMP_NUM_SYS_TIMEOUT
#endif
};
#else
extern u16_t memp_num[];
#endif

#if (LWIP_UDP!=1)
#undef UDP_NUM
#define UDP_NUM 0
#endif

#if (LWIP_TCP!=1)
#undef TCP_NUM
#undef LTCP_NUM
#undef TCP_SEG_NUM
#define TCP_NUM 0
#define LTCP_NUM 0
#define TCP_SEG_NUM 0
#endif

EXTVAR_ARRAY(u8_t memp_memory,(PBUF_NUM *  
			 MEM_ALIGN_SIZE(sizeof(struct pbuf) +  
					sizeof(struct memp)) +   
			UDP_NUM *  
			MEM_ALIGN_SIZE(sizeof(struct udp_pcb) + 
					sizeof(struct memp)) + 
			TCP_NUM * 
			 MEM_ALIGN_SIZE(sizeof(struct tcp_pcb) + 
					sizeof(struct memp)) + 
			LTCP_NUM * 
			 MEM_ALIGN_SIZE(sizeof(struct tcp_pcb_listen) +  
					sizeof(struct memp)) +  
			TCP_SEG_NUM *  
			 MEM_ALIGN_SIZE(sizeof(struct tcp_seg) +  
					sizeof(struct memp)) 
/*#if (NO_SYS!=1)	
				 
					 +  
			MEMP_NUM_NETBUF *  
			 MEM_ALIGN_SIZE(sizeof(struct netbuf) +  
					sizeof(struct memp)) +  
			MEMP_NUM_NETCONN *  
			 MEM_ALIGN_SIZE(sizeof(struct netconn) +  
					sizeof(struct memp)) +  
			MEMP_NUM_API_MSG *  
			 MEM_ALIGN_SIZE(sizeof(struct api_msg) +  
					sizeof(struct memp)) +  
			MEMP_NUM_TCPIP_MSG *  
			 MEM_ALIGN_SIZE(sizeof(struct tcpip_msg) +  
					sizeof(struct memp)) +  
			MEMP_NUM_SYS_TIMEOUT *  
			 MEM_ALIGN_SIZE(sizeof(struct sys_timeout) +  
					sizeof(struct memp)) 
#endif*/					
					));
					
					
EXTVAR(pbuf_num,PBUF_NUM);
EXTVAR(udp_num,UDP_NUM);
EXTVAR(tcp_num,TCP_NUM);
EXTVAR(ltcp_num,LTCP_NUM);
EXTVAR(tcp_seg_num,TCP_SEG_NUM);

#endif

#endif /* __LWIP_MEMP_H__  */