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/*
* Copyright (c) 2023, 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.
*/
/*
* @test
* @enablePreview
* @library ../ /test/lib
* @requires jdk.foreign.linker != "UNSUPPORTED"
* @run testng/othervm --enable-native-access=ALL-UNNAMED TestTrivial
*/
import org.testng.annotations.Test;
import java.lang.foreign.Arena;
import java.lang.foreign.FunctionDescriptor;
import java.lang.foreign.Linker;
import java.lang.foreign.MemoryLayout;
import java.lang.foreign.MemorySegment;
import java.lang.foreign.SegmentAllocator;
import java.lang.foreign.StructLayout;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.VarHandle;
import static org.testng.Assert.assertEquals;
public class TestTrivial extends NativeTestHelper {
static {
System.loadLibrary("Trivial");
}
@Test
public void testEmpty() throws Throwable {
MethodHandle handle = downcallHandle("empty", FunctionDescriptor.ofVoid(), Linker.Option.isTrivial());
handle.invokeExact();
}
@Test
public void testIdentity() throws Throwable {
MethodHandle handle = downcallHandle("identity", FunctionDescriptor.of(C_INT, C_INT), Linker.Option.isTrivial());
int result = (int) handle.invokeExact(42);
assertEquals(result, 42);
}
@Test
public void testWithReturnBuffer() throws Throwable {
StructLayout bigLayout = MemoryLayout.structLayout(
C_LONG_LONG.withName("x"),
C_LONG_LONG.withName("y"));
MethodHandle handle = downcallHandle("with_return_buffer", FunctionDescriptor.of(bigLayout), Linker.Option.isTrivial());
VarHandle vhX = bigLayout.varHandle(MemoryLayout.PathElement.groupElement("x"));
VarHandle vhY = bigLayout.varHandle(MemoryLayout.PathElement.groupElement("y"));
try (Arena arena = Arena.ofConfined()) {
MemorySegment result = (MemorySegment) handle.invokeExact((SegmentAllocator) arena);
long x = (long) vhX.get(result);
assertEquals(x, 10);
long y = (long) vhY.get(result);
assertEquals(y, 11);
}
}
@Test
public void testCaptureErrno() throws Throwable {
Linker.Option ccs = Linker.Option.captureCallState("errno");
MethodHandle handle = downcallHandle("capture_errno", FunctionDescriptor.ofVoid(C_INT), Linker.Option.isTrivial(), ccs);
StructLayout capturedStateLayout = Linker.Option.captureStateLayout();
VarHandle errnoHandle = capturedStateLayout.varHandle(MemoryLayout.PathElement.groupElement("errno"));
try (Arena arena = Arena.ofConfined()) {
MemorySegment captureSeg = arena.allocate(capturedStateLayout);
handle.invokeExact(captureSeg, 42);
int capturedErrno = (int) errnoHandle.get(captureSeg);
assertEquals(capturedErrno, 42);
}
}
}
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