Mercurial > hg > truffle
view graal/com.oracle.graal.debug/src/com/oracle/graal/debug/DebugMemUseTracker.java @ 17359:115de469a26b
support distributions in pom.mxdeps files
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 07 Oct 2014 11:42:41 +0200 |
parents | 0dc0926cf0d8 |
children | fa75218e3942 |
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/* * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.debug; import com.sun.management.*; /** * Tracks memory usage within a scope using {@link ThreadMXBean}. This facility should be employed * using the try-with-resources pattern: * * <pre> * try (DebugMemUseTracker.Closeable a = memUseTracker.start()) { * // the code to measure * } * </pre> */ public interface DebugMemUseTracker { public interface Closeable extends AutoCloseable { void close(); } /** * Creates a point from which memory usage will be recorded if memory use tracking is * {@linkplain Debug#isMemUseTrackingEnabled() enabled}. * * @return an object that must be closed once the activity has completed to add the memory used * since this call to the total for this tracker */ Closeable start(); /** * Gets the current value of this tracker. */ long getCurrentValue(); }