diff options
Diffstat (limited to 'device/hid/hid_service.h')
| -rw-r--r-- | device/hid/hid_service.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/device/hid/hid_service.h b/device/hid/hid_service.h index 6d6ef2b..4a4d3ad 100644 --- a/device/hid/hid_service.h +++ b/device/hid/hid_service.h @@ -27,7 +27,15 @@ class HidService { class Observer { public: virtual void OnDeviceAdded(scoped_refptr<HidDeviceInfo> info); + // Notifies all observers that a device is being removed, called before + // removing the device from HidService. Observers should not depend on the + // order in which they are notified of the OnDeviceRemove event. virtual void OnDeviceRemoved(scoped_refptr<HidDeviceInfo> info); + // Notifies all observers again, after having first notified all observers + // with OnDeviceRemoved and removed the device from internal structures. + // Each observer must not depend on any other observers' awareness of the + // device as they could be cleaned up in any order. + virtual void OnDeviceRemovedCleanup(scoped_refptr<HidDeviceInfo> info); }; typedef base::Callback<void(const std::vector<scoped_refptr<HidDeviceInfo>>&)> |