FLock

   

Declaration:

Procedure FLock (Var F; Mode : longint) ;

Description:

FLock implements file locking. it sets or removes a lock on the file F. F can be of type Text or File, or it can be a LINUX filedescriptor (a longint)

Mode can be one of the following constants :

LOCK_SH

sets a shared lock.

LOCK_EX

sets an exclusive lock.

LOCK_UN

unlocks the file.

LOCK_NB

This can be OR-ed together with the other. If this is done the application doesn't block when locking.

Errors:

Errors are reported in LinuxError.

See also:

Fcntl, flock (2)