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Truffle is a multi-language framework for executing dynamic languages
that achieves high performance when combined with Graal.
/*
* Copyright (c) 2018, 2020, 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 com.oracle.truffle.api.library;
import com.oracle.truffle.api.dsl.GeneratedBy;
import com.oracle.truffle.api.library.LibraryFactory.ResolvedDispatch;
import com.oracle.truffle.api.utilities.FinalBitSet;
/**
* Base class for generated export classes. This class is not intended to be sub-classed or used
* manually.
*
* @see ExportLibrary to implement / export library message.
* @since 19.0
*/
public abstract class LibraryExport {
static final String GENERATED_CLASS_SUFFIX = "Gen";
private final Class receiverClass;
private final Class library;
private final boolean defaultExport;
Class registerClass;
/**
* Constructor for generated code. Do not call manually.
*
* @since 19.0
*/
protected LibraryExport(Class library, Class receiverClass, boolean defaultExport) {
this.library = library;
this.receiverClass = receiverClass;
this.defaultExport = defaultExport;
}
/**
* Implemented generated by {@link ExportLibrary}. Do not implement manually.
*
* @since 19.0
*/
protected abstract T createUncached(Object receiver);
/**
* Implemented generated by {@link ExportLibrary}. Do not implement manually.
*
* @since 19.0
*/
protected abstract T createCached(Object receiver);
final boolean isDefaultExport() {
return defaultExport;
}
final Class getReceiverClass() {
return receiverClass;
}
final Class getLibrary() {
return library;
}
/**
* Internal method for generated code only.
*
* @since 20.0
*/
protected static T createDelegate(LibraryFactory factory, T delegate) {
T parent = factory.createDelegate(delegate);
if (!delegate.isAdoptable()) {
/*
* We force adoption for the uncached case because we need the parent pointer to
* implement @CachedLibrary("this"), as this should point to the parent delgate library.
* With this we can use the same parent pointer approach for cached and uncached.
*/
LibraryAccessor.nodeAccessor().forceAdoption(parent, delegate);
}
return parent;
}
/**
* Internal method for generated code only.
*
* @since 20.0
*/
protected static FinalBitSet createMessageBitSet(LibraryFactory factory, String... messageNames) {
Message[] messages = new Message[messageNames.length];
for (int i = 0; i < messageNames.length; i++) {
messages[i] = factory.nameToMessages.get(messageNames[i]);
}
return factory.createMessageBitSet(messages);
}
/**
* {@inheritDoc}
*
* @since 19.0
*/
@Override
public final String toString() {
return "LibraryExport[" + this.getClass().getAnnotation(GeneratedBy.class).value().getName() + "]";
}
/**
* Called only by code generated by {@link ExportLibrary}. Do not call manually. Multiple calls
* with the same receiver class will lead to an {@link IllegalStateException}.
*
* @since 19.0
*/
public static void register(Class receiverClass, LibraryExport... libs) {
ResolvedDispatch.register(receiverClass, libs);
}
/**
* Internal interface for generated code only.
*
* @since 20.0
*/
protected interface DelegateExport {
/**
* Internal method for generated code only.
*
* @since 20.0
*/
Object readDelegateExport(Object receiver);
/**
* Internal method for generated code only.
*
* @since 20.0
*/
FinalBitSet getDelegateExportMessages();
/**
* Internal method for generated code only.
*
* @since 20.0
*/
Library getDelegateExportLibrary(Object delegate);
}
}