1 // Copyright 2016 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 package org.chromium.mojo.system; 6 7 import org.chromium.mojo.system.Core.HandleSignals; 8 9 /** 10 * Watches a handle for signals being satisfied. 11 */ 12 public interface Watcher { 13 /** 14 * Callback passed to {@link Watcher#start}. 15 */ 16 public interface Callback { 17 /** 18 * Called when the handle is ready. 19 */ 20 public void onResult(int result); 21 } 22 23 /** 24 * Starts watching a handle. 25 */ 26 int start(Handle handle, HandleSignals signals, Callback callback); 27 28 /** 29 * Cancels an already-started watch. 30 */ 31 void cancel(); 32 33 /** 34 * Destroys the underlying implementation. Other methods will fail after destroy has been 35 * called. 36 */ 37 void destroy(); 38 } 39
