Enum FileHolder 

pub enum FileHolder {
    Strong(Arc<ErofsFile>),
    Weak(Weak<ErofsFile>),
}

Manages the in-memory lifecycle of an active pager-backed file.

To prevent memory leaks, the pager receiver initially holds files as Weak references. When a client checks out a VMO (e.g., via get_backing_memory), this is upgraded to Strong so the file and its metadata are not dropped while actively mapped. Once the client closes all VMO handles, Zircon’s VMO_ZERO_CHILDREN signal downgrades this back to Weak, allowing cleanup if no other system handles are open.

Variants

Strong(Arc<ErofsFile>)

Weak(Weak<ErofsFile>)