Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Elliott Hughes | 5d930ca | 2014-04-23 17:53:37 -0700 | [diff] [blame] | 17 | package android.system; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 18 | |
| 19 | import java.io.FileDescriptor; |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 20 | import libcore.util.Objects; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 21 | |
| 22 | /** |
| 23 | * Corresponds to C's {@code struct pollfd} from |
| 24 | * <a href="http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/poll.h.html"><poll.h></a> |
Elliott Hughes | 5d930ca | 2014-04-23 17:53:37 -0700 | [diff] [blame] | 25 | * |
| 26 | * @hide |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 27 | */ |
| 28 | public final class StructPollfd { |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 29 | /** The file descriptor to poll. */ |
| 30 | public FileDescriptor fd; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 31 | |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 32 | /** |
| 33 | * The events we're interested in. POLLIN corresponds to being in select(2)'s read fd set, |
| 34 | * POLLOUT to the write fd set. |
| 35 | */ |
| 36 | public short events; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 37 | |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 38 | /** The events that actually happened. */ |
| 39 | public short revents; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 40 | |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 41 | /** |
| 42 | * A non-standard extension that lets callers conveniently map back to the object |
| 43 | * their fd belongs to. This is used by Selector, for example, to associate each |
| 44 | * FileDescriptor with the corresponding SelectionKey. |
| 45 | */ |
| 46 | public Object userData; |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 47 | |
Elliott Hughes | fe77f81 | 2014-04-29 17:59:30 -0700 | [diff] [blame] | 48 | @Override public String toString() { |
| 49 | return Objects.toString(this); |
| 50 | } |
Elliott Hughes | 70c8204 | 2011-05-11 16:12:36 -0700 | [diff] [blame] | 51 | } |