| /******************************************************************************* |
| * Copyright (c) 2003, 2005 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.perfmsr.core; |
| |
| /** |
| * Some natives for PerformanceMonitorWindows. (We cannot fold them into the PerformanceMonitorWindows because this would break the |
| * natives and we don't want to rebuild them yet). |
| */ |
| public class PerformanceMonitor { |
| |
| /** |
| * ivjperf - name of the library that implements the native methods. |
| */ |
| private static final String NATIVE_LIBRARY_NAME = "ivjperf"; //$NON-NLS-1$ |
| |
| /** |
| * Is the native library loaded? 0-don't know, 1-no, 2-yes |
| */ |
| private static int fgIsLoaded = 0; |
| |
| /** |
| * Answer true if the native library for this class has been successfully loaded. If the load has not been attempted yet, try to |
| * load it. |
| * |
| * @return true if native library has been successfully loaded |
| */ |
| public static boolean isLoaded() { |
| if (fgIsLoaded == 0) { |
| try { |
| System.loadLibrary(NATIVE_LIBRARY_NAME); |
| fgIsLoaded = 2; |
| } |
| catch (Throwable e) { |
| e.printStackTrace(); |
| fgIsLoaded = 1; |
| } |
| } |
| return fgIsLoaded == 2; |
| } |
| |
| /** |
| * Calls the Windows GetPerformanceInfo function |
| * |
| * @param counters |
| * any array of counters that corresponds to the Windows PERFORMANCE_INFORMATION structure. |
| */ |
| public static native void nativeGetPerformanceInfo(long[] counters); |
| |
| public static native boolean nativeGetPerformanceCounters(long[] counters); |
| |
| public static native String nativeGetUUID(); |
| } |