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package com.oracle.truffle.nfi.spi;

import com.oracle.truffle.api.interop.ArityException;
import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.UnsupportedMessageException;
import com.oracle.truffle.api.interop.UnsupportedTypeException;
import com.oracle.truffle.api.library.GenerateLibrary;
import com.oracle.truffle.api.library.Library;
import com.oracle.truffle.nfi.spi.types.NativeSimpleType;

Library that specifies the protocol between the Truffle NFI and its backend implementations.
/**
 * Library that specifies the protocol between the Truffle NFI and its backend implementations.
 */
@GenerateLibrary
@SuppressWarnings("unused")
public abstract class NFIBackendSignatureLibrary extends Library {

    
Call a native function with this signature.
/**
     * Call a native function with this signature.
     */
    public abstract Object call(Object signature, Object functionPointer, Object... args) throws ArityException, UnsupportedTypeException, UnsupportedMessageException;

    
Create a function pointer closure that calls back into an executable object. This message must return something that's compatible with NativeSimpleType.POINTER. The returned pointer should be a function pointer. Calling that function pointer sends the InteropLibrary.execute message to the executable object. The returned object should not be executable. /**
     * Create a function pointer closure that calls back into an executable object.
     *
     * This message must return something that's compatible with {@link NativeSimpleType#POINTER}.
     * The returned pointer should be a function pointer. Calling that function pointer sends the
     * {@link InteropLibrary#execute} message to the executable object. The returned object should
     * not be executable.
     */
    public abstract Object createClosure(Object signature, Object executable);
}