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    • org.pkl.thirdparty.truffle.polyglot.PolyglotLanguageInstance Maven / Gradle / Ivy

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    /*
 * Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.pkl.thirdparty.truffle.polyglot;

import static org.pkl.thirdparty.truffle.polyglot.EngineAccessor.LANGUAGE;

import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import java.util.function.Function;

import org.pkl.thirdparty.graalvm.collections.Pair;

import org.pkl.thirdparty.truffle.api.CallTarget;
import org.pkl.thirdparty.truffle.api.CompilerDirectives.CompilationFinal;
import org.pkl.thirdparty.truffle.api.TruffleLanguage;
import org.pkl.thirdparty.truffle.api.interop.TruffleObject;
import org.pkl.thirdparty.truffle.api.nodes.RootNode;
import org.pkl.thirdparty.truffle.polyglot.PolyglotImpl.VMObject;
import org.pkl.thirdparty.truffle.polyglot.PolyglotLocals.LanguageContextLocal;
import org.pkl.thirdparty.truffle.polyglot.PolyglotLocals.LanguageContextThreadLocal;
import org.pkl.thirdparty.truffle.polyglot.PolyglotLocals.LocalLocation;

final class PolyglotLanguageInstance implements VMObject {

    final PolyglotLanguage language;
    final TruffleLanguage spi;
    /*
     * The sharing layer might change for the host language only.
     */
    @CompilationFinal PolyglotSharingLayer sharing;

    private final Map, PolyglotValueDispatch> valueCache;
    private final Map, CallTarget> callTargetCache;

    final Map hostToGuestCodeCache = new ConcurrentHashMap<>();
    final Map, Object> staticObjectClassLoaders = new ConcurrentHashMap<>();
    final ConcurrentHashMap, Class>, Object> generatorCache = new ConcurrentHashMap<>();

    final WeakAssumedValue singleLanguageContext = new WeakAssumedValue<>("single language context");
    // effectively final
    List> contextLocals;
    List> contextThreadLocals;
    LocalLocation[] contextLocalLocations;
    LocalLocation[] contextThreadLocalLocations;

    @CompilationFinal private volatile Object guestToHostCodeCache;

    private static final AtomicReferenceFieldUpdater GUEST_TO_HOST_CODE_CACHE_UPDATER = //
                    AtomicReferenceFieldUpdater.newUpdater(PolyglotLanguageInstance.class, Object.class, "guestToHostCodeCache");

    @SuppressWarnings("unchecked")
    PolyglotLanguageInstance(PolyglotLanguage language, PolyglotSharingLayer layer) {
        this.language = language;
        this.sharing = layer;

        this.valueCache = new ConcurrentHashMap<>();
        this.callTargetCache = new ConcurrentHashMap<>();
        try {
            this.spi = (TruffleLanguage) language.cache.loadLanguage();
            LANGUAGE.initializeLanguage(spi, language.info, language, language.isHost() ? null : this);
        } catch (Exception e) {
            throw new IllegalStateException(String.format("Error initializing language '%s' using class '%s'.", language.cache.getId(), language.cache.getClassName()), e);
        }
        PolyglotValueDispatch.createDefaultValues(getImpl(), this, this.valueCache);
    }

    CallTarget lookupCallTarget(Class rootNodeClass) {
        return callTargetCache.get(rootNodeClass);
    }

    CallTarget installCallTarget(RootNode rootNode) {
        return callTargetCache.computeIfAbsent(rootNode.getClass(), (r) -> rootNode.getCallTarget());
    }

    public PolyglotEngineImpl getEngine() {
        return language.engine;
    }

    PolyglotValueDispatch lookupValueCache(PolyglotContextImpl context, Object guestValue) {
        PolyglotValueDispatch cache = valueCache.get(guestValue.getClass());
        if (cache == null) {
            Object prev = language.engine.enterIfNeeded(context, true);
            try {
                cache = lookupValueCacheImpl(guestValue);
            } finally {
                language.engine.leaveIfNeeded(prev, context);
            }
        }
        assert Objects.equals(cache.languageInstance.sharing, this.sharing) : PolyglotSharingLayer.invalidSharingError(null, cache.languageInstance.sharing, this.sharing);
        return cache;
    }

    private synchronized PolyglotValueDispatch lookupValueCacheImpl(Object guestValue) {
        PolyglotValueDispatch cache = valueCache.computeIfAbsent(guestValue.getClass(), new Function, PolyglotValueDispatch>() {
            public PolyglotValueDispatch apply(Class t) {
                return PolyglotValueDispatch.createInteropValue(PolyglotLanguageInstance.this, (TruffleObject) guestValue, guestValue.getClass());
            }
        });
        return cache;
    }

    Object getGuestToHostCodeCache() {
        return guestToHostCodeCache;
    }

    Object installGuestToHostCodeCache(Object newCache) {
        if (GUEST_TO_HOST_CODE_CACHE_UPDATER.compareAndSet(this, null, newCache)) {
            return newCache;
        } else {
            return guestToHostCodeCache;
        }
    }

    @Override
    public String toString() {
        return "PolyglotLanguageInstance[" + spi + "]";
    }

}
    
    
    
    

    




    
    
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