/*
 * Copyright (c) 2020, Red Hat Inc.
 * 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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 */

package jdk.internal.platform;

/**
 * Marker interface for cgroup-based metrics
 *
 */
public interface CgroupSubsystem extends Metrics {

    /**
     * Returned for metrics of type long if the underlying implementation
     * has determined that no limit is being imposed.
     */
    public static final long LONG_RETVAL_UNLIMITED = -1;
    /**
     * Returned for metrics of type long if the underlying implementation
     * doesn't support that metric.
     */
    public static final long LONG_RETVAL_NOT_SUPPORTED = -2;
    public static final double DOUBLE_RETVAL_NOT_SUPPORTED = LONG_RETVAL_NOT_SUPPORTED;
    /**
     * Returned for metrics of type Boolean if the underlying implementation
     * doesn't support that metric.
     */
    public static final Boolean BOOL_RETVAL_NOT_SUPPORTED = null;
}