share.h

这是DOS系统的源代码,汇编写的,值得看看,对开发操作系统的人员有价值

/***
*share.h - defines file sharing modes for sopen
*
*	Copyright (c) 1985-1990, Microsoft Corporation.  All rights reserved.
*
*Purpose:
*	This file defines the file sharing modes for sopen().
*
****/

#define SH_COMPAT	0x00	/* compatibility mode */
#define SH_DENYRW	0x10	/* deny read/write mode */
#define SH_DENYWR	0x20	/* deny write mode */
#define SH_DENYRD	0x30	/* deny read mode */
#define SH_DENYNO	0x40	/* deny none mode */