Mercurial > hg > icedtea9
view pulseaudio/src/java/org/classpath/icedtea/pulseaudio/Operation.java @ 2618:fa76bb3356e5
PR1741: Fix whitespace.
author | Denis Lila <dlila@redhat.com> |
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date | Fri, 10 Jun 2011 17:42:18 -0400 |
parents | 8bf089d06e19 |
children | 1364a03b0f2b |
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/* Operation.java Copyright (C) 2008 Red Hat, Inc. This file is part of IcedTea. IcedTea is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. IcedTea is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with IcedTea; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version. */ package org.classpath.icedtea.pulseaudio; /** * Encapsulates a pa_operation object * * This is really needed only so that we can deallocate the reference counted * object. Any time a function returns an Operation object, the reference has * been incremented. The object wont be freed unless a releaseReference() is * done. * * Please see the pulseaudio api docs for more information on a pa_opreation * object * * * */ class Operation { private byte[] operationPointer; private EventLoop eventLoop; public enum State { Running, Done, Cancelled, } static { SecurityWrapper.loadNativeLibrary(); } private native void native_ref(); private native void native_unref(); private native int native_get_state(); Operation(byte[] operationPointer) { assert (operationPointer != null); this.operationPointer = operationPointer; this.eventLoop = EventLoop.getEventLoop(); } @Override protected void finalize() throws Throwable { // might catch operations which havent been released assert (operationPointer == null); super.finalize(); } /** * Increase reference count by 1 */ void addReference() { assert (operationPointer != null); synchronized (eventLoop.threadLock) { native_ref(); } } /** * Decrease reference count by 1. If the count reaches 0, object will be freed */ void releaseReference() { assert (operationPointer != null); synchronized (eventLoop.threadLock) { native_unref(); } operationPointer = null; } // FIXME broken function boolean isNull() { if (operationPointer == null) { return true; } return false; } State getState() { assert (operationPointer != null); int state; synchronized (eventLoop.threadLock) { state = native_get_state(); } switch (state) { case 0: return State.Running; case 1: return State.Done; case 2: return State.Cancelled; default: throw new IllegalStateException("Invalid operation State"); } } /** * Block until the operation has completed * */ void waitForCompletion() { assert (operationPointer != null); boolean interrupted = false; do { synchronized (eventLoop.threadLock) { if (getState() == Operation.State.Done) { return; } try { eventLoop.threadLock.wait(); } catch (InterruptedException e) { // ingore the interrupt for now interrupted = true; } } } while (getState() != State.Done); // let the caller know about the interrupt if (interrupted) { Thread.currentThread().interrupt(); } } }