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_locking Constants

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#include <sys/locking.h>

Remarks

The mode argument in the call to the _locking function specifies the locking action to be performed.

The mode argument must be one of the following manifest constants.

  • _LK_LOCK
    Locks the specified bytes. If the bytes cannot be locked, the function tries again after 1 second. If, after 10 attempts, the bytes cannot be locked, the function returns an error.

  • _LK_RLCK
    Same as _LK_LOCK.

  • _LK_NBLCK
    Locks the specified bytes. If bytes cannot be locked, the function returns an error.

  • _LK_NBRLCK
    Same as _LK_NBLCK.

  • _LK_UNLCK
    Unlocks the specified bytes. (The bytes must have been previously locked.)

See Also

Concepts

_locking

Global Constants