--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graal/com.oracle.nfi/src/com/oracle/nfi/api/NativeFunctionInterface.java	Tue Aug 05 15:58:11 2014 +0200
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package com.oracle.nfi.api;
+
+/**
+ * Interface to get a {@linkplain NativeFunctionHandle handle} or {@linkplain NativeFunctionPointer
+ * pointer} to a native function or a {@linkplain NativeLibraryHandle handle} to an open native
+ * library.
+ */
+public interface NativeFunctionInterface {
+
+    /**
+     * Resolves and returns a handle to an open native library. This method will open the library
+     * only if it is not already open.
+     *
+     * @param libPath the absolute path to the library
+     * @return the resolved library handle
+     * @throws UnsatisfiedLinkError if the library could not be found or opened
+     */
+    NativeLibraryHandle getLibraryHandle(String libPath);
+
+    /**
+     * Determines if the underlying platform/runtime supports the notion of a default library search
+     * path. For example, on *nix systems, this is typically defined by the {@code LD_LIBRARY_PATH}
+     * environment variable.
+     */
+    boolean isDefaultLibrarySearchSupported();
+
+    /**
+     * Resolves the function pointer {@code NativeFunctionPointer} of a native function.
+     *
+     * @param libraries the ordered list of libraries to search for the function
+     * @param name the name of the function to be resolved
+     * @return a pointer to the native function
+     * @throws UnsatisfiedLinkError if the function could not be resolved
+     */
+    NativeFunctionPointer getFunctionPointer(NativeLibraryHandle[] libraries, String name);
+
+    /**
+     * Resolves a function name to a {@linkplain NativeFunctionHandle handle} that can be called
+     * with a given signature. The signature contains the types of the arguments that will be passed
+     * to the handle when it is {@linkplain NativeFunctionHandle#call(Object...) called}.
+     *
+     * @param library the handle to a resolved library
+     * @param name the name of the function to be resolved
+     * @param returnType the type of the return value
+     * @param argumentTypes the types of the arguments
+     * @return the function handle of the native function
+     * @throws UnsatisfiedLinkError if the function handle could not be resolved
+     */
+    NativeFunctionHandle getFunctionHandle(NativeLibraryHandle library, String name, Class<?> returnType, Class<?>... argumentTypes);
+
+    /**
+     * Resolves a function pointer to a {@linkplain NativeFunctionHandle handle} that can be called
+     * with a given signature. The signature contains the types of the arguments that will be passed
+     * to the handle when it is {@linkplain NativeFunctionHandle#call(Object...) called}.
+     *
+     * @param functionPointer a function pointer
+     * @param returnType the type of the return value
+     * @param argumentTypes the types of the arguments
+     * @return the function handle of the native function
+     * @throws UnsatisfiedLinkError the function handle could not be created
+     */
+    NativeFunctionHandle getFunctionHandle(NativeFunctionPointer functionPointer, Class<?> returnType, Class<?>... argumentTypes);
+
+    /**
+     * Resolves a function name to a {@linkplain NativeFunctionHandle handle} that can be called
+     * with a given signature. The signature contains the types of the arguments that will be passed
+     * to the handle when it is {@linkplain NativeFunctionHandle#call(Object...) called}.
+     *
+     * @param libraries the ordered list of libraries to search for the function
+     * @param name the name of the function to be resolved
+     * @param returnType the type of the return value
+     * @param argumentTypes the types of the arguments
+     * @return the function handle of the native function
+     * @throws UnsatisfiedLinkError if the function handle could not be created
+     */
+    NativeFunctionHandle getFunctionHandle(NativeLibraryHandle[] libraries, String name, Class<?> returnType, Class<?>... argumentTypes);
+
+    /**
+     * Resolves a function name to a {@linkplain NativeFunctionHandle handle} that can be called
+     * with a given signature. The signature contains the types of the arguments that will be passed
+     * to the handle when it is {@linkplain NativeFunctionHandle#call(Object...) called}.
+     *
+     * @param name the name of the function to be resolved
+     * @param returnType the type of the return value
+     * @param argumentTypes the types of the arguments
+     * @return the function handle of the native function
+     * @throws UnsatisfiedLinkError if default library searching is not
+     *             {@linkplain #isDefaultLibrarySearchSupported() supported} or if the function
+     *             could not be resolved
+     */
+    NativeFunctionHandle getFunctionHandle(String name, Class<?> returnType, Class<?>... argumentTypes);
+
+    /**
+     * Creates a {@link NativeFunctionPointer} from a raw value.
+     *
+     * @param rawValue raw function pointer
+     * @return {@code NativeFunctionPointer} for {@code rawValue}
+     */
+    NativeFunctionPointer getNativeFunctionPointerFromRawValue(long rawValue);
+}