/*
 * Copyright (c) 2014, 2017, 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.  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 com.oracle.svm.hosted.thread;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.graalvm.compiler.api.replacements.SnippetReflectionProvider;
import org.graalvm.compiler.debug.DebugHandlersFactory;
import org.graalvm.compiler.graph.Node;
import org.graalvm.compiler.options.OptionValues;
import org.graalvm.compiler.phases.util.Providers;
import org.graalvm.nativeimage.ImageSingletons;
import org.graalvm.nativeimage.hosted.Feature;

import com.oracle.svm.core.SubstrateOptions;
import com.oracle.svm.core.annotate.AutomaticFeature;
import com.oracle.svm.core.graal.GraalFeature;
import com.oracle.svm.core.graal.meta.RuntimeConfiguration;
import com.oracle.svm.core.graal.meta.SubstrateForeignCallsProvider;
import com.oracle.svm.core.graal.snippets.CEntryPointSnippets;
import com.oracle.svm.core.graal.snippets.NodeLoweringProvider;

@AutomaticFeature
public class CEntryPointFeature implements GraalFeature {

    private int vmThreadSize = -1;

    @Override
    public List<Class<? extends Feature>> getRequiredFeatures() {
        if (SubstrateOptions.MultiThreaded.getValue()) {
            return Arrays.asList(VMThreadMTFeature.class);
        }
        return Collections.emptyList();
    }

    @Override
    public void beforeCompilation(BeforeCompilationAccess config) {
        if (SubstrateOptions.MultiThreaded.getValue()) {
            VMThreadMTFeature threadFeature = ImageSingletons.lookup(VMThreadMTFeature.class);
            vmThreadSize = threadFeature.getVMThreadSize();
        }
    }

    @Override
    public void registerLowerings(RuntimeConfiguration runtimeConfig, OptionValues options, Iterable<DebugHandlersFactory> factories, Providers providers,
                    SnippetReflectionProvider snippetReflection, Map<Class<? extends Node>, NodeLoweringProvider<?>> lowerings, boolean hosted) {

        CEntryPointSnippets.registerLowerings(options, factories, providers, snippetReflection, vmThreadSize, lowerings);
    }

    @Override
    public void registerForeignCalls(RuntimeConfiguration runtimeConfig, Providers providers, SnippetReflectionProvider snippetReflection, SubstrateForeignCallsProvider foreignCalls, boolean hosted) {
        CEntryPointSnippets.registerForeignCalls(providers, foreignCalls);
    }
}