Source code of Windows XP (NT5)
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/***
*sys/locking.h - flags for locking() function** Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.**Purpose:* This file defines the flags for the locking() function.* [System V]** [Public]**Revision History:* 08-22-89 GJF Fixed copyright* 10-30-89 GJF Fixed copyright (again)* 03-21-90 GJF Added #ifndef _INC_LOCKING stuff* 01-21-91 GJF ANSI naming.* 09-16-92 SKS Fix copyright, clean up backslash* 02-23-93 SKS Update copyright to 1993* 12-28-94 JCF Merged with mac header.* 02-14-95 CFW Clean up Mac merge, add _CRTBLD.* 04-27-95 CFW Add mac/win32 test.* 12-14-95 JWM Add "#pragma once".* 05-17-99 PML Remove all Macintosh support.*****/
#if _MSC_VER > 1000 /*IFSTRIP=IGN*/
#pragma once
#endif
#ifndef _INC_LOCKING
#define _INC_LOCKING
#if !defined(_WIN32)
#error ERROR: Only Win32 target supported!
#endif
#ifndef _CRTBLD
/* This version of the header files is NOT for user programs.
* It is intended for use when building the C runtimes ONLY. * The version intended for public use will not have this message. */#error ERROR: Use of C runtime library internal header file.
#endif /* _CRTBLD */
#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 */
#if !__STDC__
/* Non-ANSI names for compatibility */#define LK_UNLCK _LK_UNLCK
#define LK_LOCK _LK_LOCK
#define LK_NBLCK _LK_NBLCK
#define LK_RLCK _LK_RLCK
#define LK_NBRLCK _LK_NBRLCK
#endif
#endif /* _INC_LOCKING */
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