/*

 * Copyright (c) 2012, 2016, 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

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 */

package org.graalvm.compiler.hotspot.replacements;

import static org.graalvm.compiler.core.common.LocationIdentity.any;

import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG;

import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_OSTHREAD_LOCATION;

import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.JAVA_THREAD_THREAD_OBJECT_LOCATION;

import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadInterruptedOffset;

import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.osThreadOffset;

import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.threadObjectOffset;

import org.graalvm.compiler.api.replacements.ClassSubstitution;

import org.graalvm.compiler.api.replacements.MethodSubstitution;

import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor;

import org.graalvm.compiler.graph.Node.ConstantNodeParameter;

import org.graalvm.compiler.graph.Node.NodeIntrinsic;

import org.graalvm.compiler.hotspot.nodes.CurrentJavaThreadNode;

import org.graalvm.compiler.nodes.extended.ForeignCallNode;

import org.graalvm.compiler.word.Word;

/**

 * Substitutions for {@link java.lang.Thread} methods.

 */

@ClassSubstitution(Thread.class)

public class ThreadSubstitutions {

    public static boolean isInterrupted(final Thread thisObject, boolean clearInterrupted) {

        Word javaThread = CurrentJavaThreadNode.get();

        Object thread = javaThread.readObject(threadObjectOffset(INJECTED_VMCONFIG), JAVA_THREAD_THREAD_OBJECT_LOCATION);

        if (thisObject == thread) {

            Word osThread = javaThread.readWord(osThreadOffset(INJECTED_VMCONFIG), JAVA_THREAD_OSTHREAD_LOCATION);

            boolean interrupted = osThread.readInt(osThreadInterruptedOffset(INJECTED_VMCONFIG), any()) != 0;

            if (!interrupted || !clearInterrupted) {

                return interrupted;

            }

        }

        return threadIsInterruptedStub(THREAD_IS_INTERRUPTED, thisObject, clearInterrupted);

    }

    public static final ForeignCallDescriptor THREAD_IS_INTERRUPTED = new ForeignCallDescriptor("thread_is_interrupted", boolean.class, Thread.class, boolean.class);

    @NodeIntrinsic(ForeignCallNode.class)

    private static native boolean threadIsInterruptedStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Thread thread, boolean clearIsInterrupted);

}