|  | Qore Programming Language Reference Manual
    0.9.3.2
    | 
| Variables | |
| const | Qore::F_RDLCK = F_RDLCK | 
| Use for read-only locking. | |
| const | Qore::F_UNLCK = F_UNLCK | 
| Use for unlocking a lock. | |
| const | Qore::F_WRLCK = F_WRLCK | 
| Use for exclusive write locking. | |
These are the possible values for the File::lock() or File::lockBlocking() methods.