usbmsg_filter
usbmsg_filter — Adds a message class filter to a handler.
Synopsis
extern int usbmsg_filter( | | usbmsg_handler_t handler, |
| | | void* pw, |
| | | usbmsg_class_t msgclass, |
| | | int enable); |
Arguments
| handler pointer to message handler as used when registering handler.
|
| pw private word as passed when registering handler.
|
| msgclass message class to apply filter to.
|
| enable 0 indicates message class is not passed to the caller 1 indicates message class will be passed to the caller.
|
Description
Adds a message class filter to a handler. Used to enable a handler to only recive messages it wants to process.