PATHHardware Documentation > USB Devices > Mac OS USB DDK API Reference

Driver Plug-in Dispatch Table Structure

The driver dispatch table used to match and initialize the appropriate driver with a device is of the form shown here. This structure is filled in by the class driver.



 
struct USBClassDriverPluginDispatchTable {

    UInt32                          pluginVersion; 

    USBDValidateHWProcPtr           validateHWProc; 

    USBDInitializeDeviceProcPtr     initializeDeviceProc; 

    USBDInitializeInterfaceProcPtr  initializeInterfaceProc; 

    USBDFinalizeProcPtr             finalizeProc; 

    USBDDriverNotifyProcPtr         notificationProc; 

};

Field descriptions

pluginVersion: Version number of this plug-in for the driver plug-in dispatch table
USBDValidateHWProcPtr: Pointer to the procedure the driver uses to verify that the device is the proper hardware
USBDInitializeDeviceProcPtr: Pointer to the procedure that initializes the class driver
USBDInitializeInterfaceProcPtr: Pointer to the procedure that initializes a particular interface for the class driver
USBDFinalizeProcPtr: Pointer to the procedure that finalizes the class driver
USBDDriverNotifyProcPtr: Pointer to the procedure that passes notifications from the USB Manager to the class driver

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