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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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package com.oracle.truffle.llvm.runtime.interop;

import com.oracle.truffle.api.CompilerDirectives;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.interop.MessageResolution;
import com.oracle.truffle.api.interop.Resolve;
import com.oracle.truffle.api.nodes.Node;
import com.oracle.truffle.llvm.runtime.LLVMSharedGlobalVariable;
import com.oracle.truffle.llvm.runtime.interop.LLVMAddressMessageResolutionNode.LLVMAddressReadMessageResolutionNode;
import com.oracle.truffle.llvm.runtime.interop.LLVMAddressMessageResolutionNode.LLVMAddressWriteMessageResolutionNode;
import com.oracle.truffle.llvm.runtime.interop.LLVMAddressMessageResolutionNodeFactory.LLVMAddressReadMessageResolutionNodeGen;
import com.oracle.truffle.llvm.runtime.interop.LLVMAddressMessageResolutionNodeFactory.LLVMAddressWriteMessageResolutionNodeGen;

@MessageResolution(receiverType = LLVMSharedGlobalVariable.class)
public class LLVMGlobalVariableMessageResolution {

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

        @Child private LLVMAddressReadMessageResolutionNode node;

        protected Object access(VirtualFrame frame, LLVMSharedGlobalVariable receiver, int index) {
            if (node == null) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                node = insert(LLVMAddressReadMessageResolutionNodeGen.create());
            }
            return node.executeWithTarget(frame, receiver, index);
        }
    }

    @Resolve(message = "WRITE")
    public abstract static class ForeignGlobalWrite extends Node {

        @Child private LLVMAddressWriteMessageResolutionNode node;

        protected Object access(VirtualFrame frame, LLVMSharedGlobalVariable receiver, int index, Object value) {
            if (node == null) {
                CompilerDirectives.transferToInterpreterAndInvalidate();
                node = insert(LLVMAddressWriteMessageResolutionNodeGen.create());
            }
            return node.executeWithTarget(frame, receiver, index, value);
        }

    }
}