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 * Copyright (c) 2014, 2019 Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * particular file as subject to the "Classpath" exception as provided

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 *

 * 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

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package org.openjdk.bench.java.security;

import org.openjdk.jmh.annotations.Benchmark;

import org.openjdk.jmh.annotations.BenchmarkMode;

import org.openjdk.jmh.annotations.Mode;

import org.openjdk.jmh.annotations.OutputTimeUnit;

import org.openjdk.jmh.annotations.Param;

import org.openjdk.jmh.annotations.Scope;

import org.openjdk.jmh.annotations.State;

import java.security.AccessControlContext;

import java.security.AccessController;

import java.security.PrivilegedAction;

import java.util.concurrent.TimeUnit;

/**

 * Benchmark measuring AccessController.getContext

 */

@BenchmarkMode(Mode.AverageTime)

@OutputTimeUnit(TimeUnit.NANOSECONDS)

@State(Scope.Thread)

public abstract class GetContext {

    public static class Top extends GetContext {

        @Benchmark

        public AccessControlContext testNonPriv() {

            return AccessController.getContext();

        }

        @Benchmark

        public AccessControlContext testPriv() {

            PrivilegedAction<AccessControlContext> pa = () -> AccessController.getContext();

            return AccessController.doPrivileged(pa);

        }

    }

    public static class Deep extends GetContext {

        @Param({"2", "50"})

        int depth;

        private AccessControlContext recurse(int depth) {

            if (depth > 0) {

                return recurse(depth - 1);

            } else {

                return AccessController.getContext();

            }

        }

        @Benchmark

        public AccessControlContext testNonPrivRecurse() {

            return recurse(depth);

        }

        @Benchmark

        public AccessControlContext testPrivInline() {

            PrivilegedAction<AccessControlContext> pa = () -> recurse(depth);

            return AccessController.doPrivileged(pa);

        }

    }

}