| /* |
| * Copyright (C) 2010 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 libcore.io; |
| |
| import java.io.Closeable; |
| import java.io.FileDescriptor; |
| import java.io.IOException; |
| |
| public final class IoUtils { |
| private IoUtils() { |
| } |
| |
| /** |
| * Calls close(2) on 'fd'. Also resets the internal int to -1. |
| */ |
| public static native void close(FileDescriptor fd) throws IOException; |
| |
| /** |
| * Closes 'closeable', ignoring any exceptions. Does nothing if 'closeable' is null. |
| */ |
| public static void closeQuietly(Closeable closeable) { |
| if (closeable != null) { |
| try { |
| closeable.close(); |
| } catch (IOException ignored) { |
| } |
| } |
| } |
| |
| /** |
| * Returns the int file descriptor from within the given FileDescriptor 'fd'. |
| */ |
| public static native int getFd(FileDescriptor fd); |
| |
| /** |
| * Returns a new FileDescriptor whose internal integer is set to 'fd'. |
| */ |
| public static FileDescriptor newFileDescriptor(int fd) { |
| FileDescriptor result = new FileDescriptor(); |
| setFd(result, fd); |
| return result; |
| } |
| |
| /** |
| * Creates a pipe by calling pipe(2), returning the two file descriptors in |
| * elements 0 and 1 of the array 'fds'. fds[0] is the read end of the pipe. |
| * fds[1] is the write end of the pipe. Throws an appropriate IOException on failure. |
| */ |
| public static native void pipe(int[] fds) throws IOException; |
| |
| /** |
| * Sets the int file descriptor within the given FileDescriptor 'fd' to 'newValue'. |
| */ |
| public static native void setFd(FileDescriptor fd, int newValue); |
| |
| /** |
| * Sets 'fd' to be blocking or non-blocking, according to the state of 'blocking'. |
| */ |
| public static native void setBlocking(FileDescriptor fd, boolean blocking) throws IOException; |
| } |