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_locking Constants 


#include <sys/locking.h>

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.)

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