Contents

handleIsOpen

Controls the open / close behavior of an IOService object (overrideable by subclasses).

Declaration

virtual bool handleIsOpen(
 const IOService *forClient ) const;

Parameters

  • forClient:

    If non-zero, isOpen returns the open state for that client. If zero is passed, isOpen returns the open state for all clients.

Return Value

true if the specific, or any, client has the IOService object open.

Overview

IOService calls this method in its subclasses in response to the open method, so the subclass may implement the request. The default implementation provides single owner access to an IOService object via open. The object is locked via lockForArbitration before handleIsOpen is called.

See Also

Miscellaneous