NewRegistry returns a new Registry ready to be used.

Message represents a message exchanged through a Queue via msgsnd(2) and msgrcv(2).

Queue represents a SysV message queue, described by sysvipc(7).

Registry contains a set of message queues that can be referenced using keys or IDs.

Blocker is used for blocking Queue.Send, and Queue.Receive calls that serves as an abstracted version of kernel.Task.