HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

            MSC: int locking( int handle, int mode, long nbytes )

       - prototype in io.h, sys\locking.h

       - handle = opened file handle
       - nbytes = bytes to lock beginning with current file position
       - mode  = locking mode:
               = LK_LOCK       lock region; on failure waits 1 sec and
                               attempts again;  tries 10 times
               = LK_RLCK       same as LK_LOCK
               = LK_NBLCK      lock region; returns immediately on error
               = LK_NBRLCK     lock region; returns immediately on error
               = LK_UNLCK      unlock previously locked region

       - multiple locks may occur in a single file
       - overlapping locked regions are not allowed
       - returns 0 on success or -1 on failure

       - Turbo C uses lock() and unlock()

Esc or Alt-X to exit locking Home/PgUp/PgDn/End ←↑↓→