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Microsoft OS/2 SDK 2.0 05-30-1990

/***
*sys\locking.h - flags for locking() function
*
*	Copyright (c) 1985-1990, Microsoft Corporation.  All rights reserved.
*
*Purpose:
*	This file defines the flags for the locking() function.
*	[System V]
*
****/

#define LK_UNLCK	0	/* unlock the file region */
#define LK_LOCK 	1	/* lock the file region */
#define LK_NBLCK	2	/* non-blocking lock */
#define LK_RLCK 	3	/* lock for writing */
#define LK_NBRLCK	4	/* non-blocking lock for writing */

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