diff options
Diffstat (limited to 'include/linux/input.h')
| -rw-r--r-- | include/linux/input.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/input.h b/include/linux/input.h index 7be8a65..6c9d3d4 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -1198,6 +1198,8 @@ struct input_handle; * @event: event handler. This method is being called by input core with * interrupts disabled and dev->event_lock spinlock held and so * it may not sleep + * @filter: similar to @event; separates normal event handlers from + * "filters". * @connect: called when attaching a handler to an input device * @disconnect: disconnects a handler from input device * @start: starts handler for given handle. This function is called by @@ -1219,6 +1221,11 @@ struct input_handle; * same time. All of them will get their copy of input event generated by * the device. * + * The very same structure is used to implement input filters. Input core + * allows filters to run first and will not pass event to regular handlers + * if any of the filters indicate that the event should be filtered (by + * returning %true from their filter() method). + * * Note that input core serializes calls to connect() and disconnect() * methods. */ @@ -1227,6 +1234,7 @@ struct input_handler { void *private; void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value); + bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value); int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id); void (*disconnect)(struct input_handle *handle); void (*start)(struct input_handle *handle); |