2362N/A * Copyright (c) 2002, 2008, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A// Signalling operations on native threads 0N/A// On some operating systems (e.g., Linux), closing a channel while another 0N/A// thread is blocked in an I/O operation upon that channel does not cause that 0N/A// thread to be released. This class provides access to the native threads 0N/A// upon which Java threads are built, and defines a simple signal mechanism 0N/A// that can be used to release a native thread from a blocking I/O operation. 0N/A// On systems that do not require this type of signalling, the current() method 0N/A// always returns -1 and the signal(long) method has no effect. 0N/A // Returns an opaque token representing the native thread underlying the 0N/A // invoking Java thread. On systems that do not require signalling, this 0N/A // method always returns -1. 0N/A // Signals the given native thread so as to release it from a blocking I/O 0N/A // operation. On systems that do not require signalling, this method has