//作者：京东瀚览家居官方旗舰店   <--点击关注

//文件名：Chunk.h

#ifndef _CHUNK_H_
#define _CHUNK_H_


/* 接收到客户端的请求数据,*/
/* 以及对客户端发送响应的数据,*/
/* 都是通过 chunk 结构体来组织*/
#include "buffer.h"
#include "array.h"

typedef struct chunk {
	enum { UNUSED_CHUNK, MEM_CHUNK, FILE_CHUNK } type;

	buffer *mem; /* either the storage of the mem-chunk or the read-ahead buffer */

	struct {
		/* filechunk */
		buffer *name; /* name of the file */
		off_t  start; /* starting offset in the file */
		off_t  length; /* octets to send from the starting offset */

		int    fd;
		struct {
			char   *start; /* the start pointer of the mmap'ed area */
			size_t length; /* size of the mmap'ed area */
			off_t  offset; /* start is <n> octet away from the start of the file */
		} mmap;

		int is_temp; /* file is temporary and will be deleted if on cleanup */
	} file;

	off_t  offset; /*