v4.0/src/TOOLS/BLD/INC/SYS/LOCKING.H

   1 /***
   2 *sys\locking.h - flags for locking() function
   3 *
   4 *   Copyright (c) 1985-1988, Microsoft Corporation.  All rights reserved.
   5 *
   6 *Purpose:
   7 *   This file defines the flags for the locking() function.
   8 *   [System V]
   9 *
  10 *******************************************************************************/
  11
  12 #define LK_UNLCK    0   /* unlock the file region */
  13 #define LK_LOCK     1   /* lock the file region */
  14 #define LK_NBLCK    2   /* non-blocking lock */
  15 #define LK_RLCK     3   /* lock for writing */
  16 #define LK_NBRLCK   4   /* non-blocking lock for writing */