windows-server-2003/base/crts/crtw32/h/sys/locking.h

/***
*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 */