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Implementation of the Truffle NFI using CLinker from project panama.
There is a newer version: 24.1.1
/*
 * Copyright (c) 2017, 2024, 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,
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 */
package com.oracle.truffle.nfi.backend.panama;

import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.TruffleLanguage.ContextReference;
import com.oracle.truffle.api.TruffleLanguage.Env;
import com.oracle.truffle.api.nodes.Node;

import java.lang.foreign.Arena;

class PanamaNFIContext {

    final PanamaNFILanguage language;
    @SuppressWarnings("preview") Arena arena;
    @CompilationFinal Env env;

    PanamaNFIContext(PanamaNFILanguage language, Env env) {
        this.language = language;
        this.env = env;
    }

    @SuppressWarnings("preview")
    void initialize() {
        arena = Arena.ofShared();
    }

    void patchEnv(Env env) {
        this.env = env;
    }

    void dispose() {
        if (arena != null) {
            arena.close();
        }
    }

    @SuppressWarnings("preview")
    Arena getContextArena() {
        return arena;
    }

    @TruffleBoundary
    PanamaType lookupEnvType() {
        // TODO
        return null;
    }

    private static final ContextReference REFERENCE = ContextReference.create(PanamaNFILanguage.class);

    static PanamaNFIContext get(Node node) {
        return REFERENCE.get(node);
    }
}