Merge "InputManagerService: Do not remove input channel when disposing monitor" into sc-dev

     * Interface for the system to handle request from InputMonitors.

     */

    private final class InputMonitorHost extends IInputMonitorHost.Stub {

        private final IBinder mToken;

        private IBinder mToken;

        InputMonitorHost(IBinder token) {

            mToken = token;

        @Override

        public void pilferPointers() {

            if (mToken == null) {

                throw new IllegalStateException(

                        "Illegal call to pilferPointers after InputMonitorHost is disposed.");

            }

            nativePilferPointers(mPtr, mToken);

        }

        @Override

        public void dispose() {

            nativeRemoveInputChannel(mPtr, mToken);

            // We do not remove the input monitor here by calling nativeRemoveInputChannel because

            // it causes a race in InputDispatcher between the removal of the InputChannel through

            // that call and the InputChannel#dispose call (which causes an FD hangup) from the

            // client (b/189135695).

            //

            // NOTE: This means the client is responsible for properly closing the InputMonitor by

            // disposing the InputChannel and all its duplicates.

            mToken = null;

        }

    }