com.oracle.truffle.nfi.impl.LibFFILibraryMessageResolution Maven / Gradle / Ivy

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/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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 * (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),
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
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package com.oracle.truffle.nfi.impl;

import com.oracle.truffle.api.TruffleLanguage.ContextReference;
import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.interop.CanResolve;
import com.oracle.truffle.api.interop.KeyInfo;
import com.oracle.truffle.api.interop.MessageResolution;
import com.oracle.truffle.api.interop.Resolve;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.interop.UnknownIdentifierException;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.nfi.impl.TypeConversion.AsStringNode;
import com.oracle.truffle.nfi.impl.LibFFILibraryMessageResolutionFactory.CachedLookupSymbolNodeGen;
import com.oracle.truffle.nfi.impl.TypeConversionFactory.AsStringNodeGen;

@MessageResolution(receiverType = LibFFILibrary.class)
class LibFFILibraryMessageResolution {

    abstract static class CachedLookupSymbolNode extends Node {

        private final ContextReference ctxRef = NFILanguageImpl.getCurrentContextReference();

        protected abstract TruffleObject executeLookup(LibFFILibrary receiver, String symbol);

        @Specialization(guards = {"receiver == cachedReceiver", "symbol.equals(cachedSymbol)"})
        @SuppressWarnings("unused")
        protected TruffleObject lookupCached(LibFFILibrary receiver, String symbol,
                        @Cached("receiver") LibFFILibrary cachedReceiver,
                        @Cached("symbol") String cachedSymbol,
                        @Cached("lookup(cachedReceiver, cachedSymbol)") TruffleObject cachedRet) {
            return cachedRet;
        }

        @Specialization(replaces = "lookupCached")
        protected TruffleObject lookup(LibFFILibrary receiver, String symbol) {
            try {
                return ctxRef.get().lookupSymbol(receiver, symbol);
            } catch (UnsatisfiedLinkError ex) {
                throw UnknownIdentifierException.raise(symbol);
            }
        }
    }

    @Resolve(message = "READ")
    abstract static class LookupSymbolNode extends Node {

        @Child private CachedLookupSymbolNode cached = CachedLookupSymbolNodeGen.create();
        @Child private AsStringNode asString = AsStringNodeGen.create(true);

        public TruffleObject access(LibFFILibrary receiver, Object symbol) {
            return cached.executeLookup(receiver, asString.execute(symbol));
        }
    }

    @Resolve(message = "KEY_INFO")
    abstract static class KeyInfoNode extends Node {

        private final ContextReference ctxRef = NFILanguageImpl.getCurrentContextReference();

        @Child private AsStringNode asString = AsStringNodeGen.create(true);

        public int access(LibFFILibrary receiver, Object arg) {
            String symbol = asString.execute(arg);
            try {
                ctxRef.get().lookupSymbol(receiver, symbol);
                return KeyInfo.READABLE;
            } catch (UnsatisfiedLinkError ex) {
                return KeyInfo.NONE;
            }
        }
    }

    @CanResolve
    abstract static class CanResolveLibFFILibraryNode extends Node {

        public boolean test(TruffleObject receiver) {
            return receiver instanceof LibFFILibrary;
        }
    }
}