_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.
| Value | Description |
|---|---|
_LK_LOCK |
Locks the specified bytes. If the bytes can't be locked, the function tries again after 1 second. If the bytes can't be locked after 10 attempts, the function returns an error. |
_LK_RLCK |
Same as _LK_LOCK. |
_LK_NBLCK |
Locks the specified bytes. If bytes can't 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.) |