_locking Constants
The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.
The latest version of this topic can be found at _locking Constants.
Syntax
#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.)