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_locking
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─────Run-Time Library───────────────────────────────────────────────────────
Include: <io.h>, <sys\locking.h>, <errno.h>
Syntax: int _locking( int handle, int mode, long nbytes );
mode: _LK_LOCK, _LK_NBLCK, _LK_NBRLCK, _LK_RLCK, _LK_UNLCK
Returns: 0 if successful, or -1 if not.
errno: EACCES, EBADF, EDEADLOCK, EINVAL
See also: _sopen, _fsopen
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