| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.system; |
| |
| import java.io.FileDescriptor; |
| import libcore.util.Objects; |
| |
| /** |
| * Used as an in/out parameter to {@link Os#poll}. |
| * Corresponds to C's {@code struct pollfd} from {@code <poll.h>}. |
| */ |
| public final class StructPollfd { |
| /** The file descriptor to poll. */ |
| public FileDescriptor fd; |
| |
| /** |
| * The events we're interested in. POLLIN corresponds to being in select(2)'s read fd set, |
| * POLLOUT to the write fd set. |
| */ |
| public short events; |
| |
| /** The events that actually happened. */ |
| public short revents; |
| |
| /** |
| * A non-standard extension that lets callers conveniently map back to the object |
| * their fd belongs to. This is used by Selector, for example, to associate each |
| * FileDescriptor with the corresponding SelectionKey. |
| */ |
| public Object userData; |
| |
| @Override public String toString() { |
| return Objects.toString(this); |
| } |
| } |