112 lines
4.2 KiB
Java
112 lines
4.2 KiB
Java
/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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import jdk.incubator.foreign.Addressable;
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import jdk.incubator.foreign.CLinker;
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import jdk.incubator.foreign.FunctionDescriptor;
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import jdk.incubator.foreign.MemoryAddress;
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import jdk.incubator.foreign.MemoryLayout;
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import jdk.incubator.foreign.MemorySegment;
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import jdk.incubator.foreign.ResourceScope;
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import jdk.incubator.foreign.SegmentAllocator;
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import jdk.incubator.foreign.ValueLayout;
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import java.lang.invoke.MethodHandle;
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public class NativeTestHelper {
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public static boolean isIntegral(MemoryLayout layout) {
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return layout instanceof ValueLayout valueLayout && isIntegral(valueLayout.carrier());
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}
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static boolean isIntegral(Class<?> clazz) {
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return clazz == byte.class || clazz == char.class || clazz == short.class
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|| clazz == int.class || clazz == long.class;
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}
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public static boolean isPointer(MemoryLayout layout) {
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return layout instanceof ValueLayout valueLayout && valueLayout.carrier() == MemoryAddress.class;
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}
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// the constants below are useful aliases for C types. The type/carrier association is only valid for 64-bit platforms.
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/**
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* The layout for the {@code bool} C type
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*/
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public static final ValueLayout.OfBoolean C_BOOL = ValueLayout.JAVA_BOOLEAN;
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/**
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* The layout for the {@code char} C type
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*/
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public static final ValueLayout.OfByte C_CHAR = ValueLayout.JAVA_BYTE;
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/**
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* The layout for the {@code short} C type
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*/
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public static final ValueLayout.OfShort C_SHORT = ValueLayout.JAVA_SHORT.withBitAlignment(16);
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/**
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* The layout for the {@code int} C type
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*/
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public static final ValueLayout.OfInt C_INT = ValueLayout.JAVA_INT.withBitAlignment(32);
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/**
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* The layout for the {@code long long} C type.
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*/
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public static final ValueLayout.OfLong C_LONG_LONG = ValueLayout.JAVA_LONG.withBitAlignment(64);
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/**
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* The layout for the {@code float} C type
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*/
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public static final ValueLayout.OfFloat C_FLOAT = ValueLayout.JAVA_FLOAT.withBitAlignment(32);
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/**
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* The layout for the {@code double} C type
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*/
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public static final ValueLayout.OfDouble C_DOUBLE = ValueLayout.JAVA_DOUBLE.withBitAlignment(64);
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/**
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* The {@code T*} native type.
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*/
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public static final ValueLayout.OfAddress C_POINTER = ValueLayout.ADDRESS.withBitAlignment(64);
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private static CLinker LINKER = CLinker.systemCLinker();
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private static final MethodHandle FREE = LINKER.downcallHandle(
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LINKER.lookup("free").get(), FunctionDescriptor.ofVoid(ValueLayout.ADDRESS));
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private static final MethodHandle MALLOC = LINKER.downcallHandle(
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LINKER.lookup("malloc").get(), FunctionDescriptor.of(ValueLayout.ADDRESS, ValueLayout.JAVA_LONG));
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public static void freeMemory(Addressable address) {
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try {
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FREE.invokeExact(address);
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} catch (Throwable ex) {
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throw new IllegalStateException(ex);
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}
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}
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public static MemoryAddress allocateMemory(long size) {
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try {
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return (MemoryAddress)MALLOC.invokeExact(size);
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} catch (Throwable ex) {
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throw new IllegalStateException(ex);
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}
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}
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}
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