IsNotSupported returns a boolean indicating whether the error is known to report that a function is not supported (possibly for a specific input).

Lock places an advisory write lock on the file, blocking until it can be locked.

MutexAt returns a file based mutex at a given path.

RLock places an advisory read lock on the file, blocking until it can be locked.

Unlock removes an advisory lock placed on f by this process.

ErrNotSupported is a checkable error (with IsNotSupported(...)) that indicates a given operation is not supported.

Mutex manages filehandle based locks that are scoped to the lifetime of a parent process.

A File provides the minimal set of methods required to lock an open file.