Contents

Open

Opens a session to a host device.

Declaration

virtual kern_return_t Open(IOService *forClient, IOOptionBits options, uintptr_t arg);

Parameters

  • forClient:

    The service object that is opening the session.

  • options:

    The options to use when opening the session. Specify 0 for this parameter.

  • arg:

    Additional arguments to the function. Specify NULL for this parameter.

Return Value

kIOReturnSuccess on success, or another value if an error occurs. See Error Codes.

Discussion

This method opens a session to the IOUSBHostDevice, and acquires the service’s workloop lock. Child IOUSBHostInterface objects may open simultaneous sessions, but only one IOUSBHostDevice object at a time may open a session to the device.

See Also

Managing the Device Session