fn tryLock(file: File, l: Lock) LockError!bool

Attempts to obtain a lock, returning true if the lock is obtained, and false if there was an existing incompatible lock held. A process may hold only one type of lock (shared or exclusive) on a file. When a process terminates in any way, the lock is released.

Assumes the file is unlocked.

TODO: integrate with async I/O

Parameters

file: File,
l: Lock,