Examples with VarHandle java.lang.invoke.VarHandle used on opensource projects

Example 31 with VarHandle

use of java.lang.invoke.VarHandle in project openj9 by eclipse.

the class StructTests method test_addDoubleAndDoubleIntFromStruct.

@Test
public void test_addDoubleAndDoubleIntFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_DOUBLE.withName("elem1"), C_INT.withName("elem2"));
    VarHandle elemHandle1 = structLayout.varHandle(double.class, PathElement.groupElement("elem1"));
    VarHandle elemHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(double.class, double.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_DOUBLE, C_DOUBLE, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addDoubleAndDoubleIntFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    elemHandle1.set(structSegmt, 218.555D);
    elemHandle2.set(structSegmt, 19);
    double result = (double) mh.invokeExact(216.666D, structSegmt);
    Assert.assertEquals(result, 454.221D, 0.001D);
    structSegmt.close();
}

Example 32 with VarHandle

use of java.lang.invoke.VarHandle in project openj9 by eclipse.

the class StructTests method test_addLongFromPointerAndLongsFromStruct_returnLongPointer.

@Test
public void test_addLongFromPointerAndLongsFromStruct_returnLongPointer() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(longLayout.withName("elem1"), longLayout.withName("elem2"));
    VarHandle longHandle1 = structLayout.varHandle(long.class, PathElement.groupElement("elem1"));
    VarHandle longHandle2 = structLayout.varHandle(long.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addLongFromPointerAndLongsFromStruct_returnLongPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment longSegmt = MemorySegment.allocateNative(longLayout);
    MemoryAccess.setLong(longSegmt, 1122334455L);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    longHandle1.set(structSegmt, 6677889900L);
    longHandle2.set(structSegmt, 1234567890L);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(longSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(longLayout.byteSize());
    VarHandle longHandle = MemoryHandles.varHandle(long.class, ByteOrder.nativeOrder());
    long result = (long) longHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 9034792245L);
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), longSegmt.address().toRawLongValue());
    longSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}

Example 33 with VarHandle

use of java.lang.invoke.VarHandle in project openj9 by eclipse.

the class StructTests method test_addByteFromPointerAndBytesFromStruct_returnBytePointer.

@Test
public void test_addByteFromPointerAndBytesFromStruct_returnBytePointer() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_CHAR.withName("elem1"), C_CHAR.withName("elem2"));
    VarHandle byteHandle1 = structLayout.varHandle(byte.class, PathElement.groupElement("elem1"));
    VarHandle byteHandle2 = structLayout.varHandle(byte.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addByteFromPointerAndBytesFromStruct_returnBytePointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment byteSegmt = MemorySegment.allocateNative(C_CHAR);
    MemoryAccess.setByte(byteSegmt, (byte) 12);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    byteHandle1.set(structSegmt, (byte) 18);
    byteHandle2.set(structSegmt, (byte) 19);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(byteSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(C_CHAR.byteSize());
    VarHandle byteHandle = MemoryHandles.varHandle(byte.class, ByteOrder.nativeOrder());
    byte result = (byte) byteHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 49);
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), byteSegmt.address().toRawLongValue());
    byteSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}

Example 34 with VarHandle

use of java.lang.invoke.VarHandle in project openj9 by eclipse.

the class StructTests method test_addIntAndLongIntFromStruct.

@Test
public void test_addIntAndLongIntFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(longLayout.withName("elem1"), C_INT.withName("elem2"), MemoryLayout.ofPaddingBits(C_INT.bitSize()));
    VarHandle elemHandle1 = structLayout.varHandle(long.class, PathElement.groupElement("elem1"));
    VarHandle elemHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(long.class, int.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(longLayout, C_INT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addIntAndLongIntFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    elemHandle1.set(structSegmt, 667788990011L);
    elemHandle2.set(structSegmt, 11223344);
    long result = (long) mh.invokeExact(1234567, structSegmt);
    Assert.assertEquals(result, 667801447922L);
    structSegmt.close();
}

Example 35 with VarHandle

use of java.lang.invoke.VarHandle in project openj9 by eclipse.

the class StructTests method test_addByteAndBytesFromStruct.

@Test
public void test_addByteAndBytesFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_CHAR.withName("elem1"), C_CHAR.withName("elem2"));
    VarHandle byteHandle1 = structLayout.varHandle(byte.class, PathElement.groupElement("elem1"));
    VarHandle byteHandle2 = structLayout.varHandle(byte.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(byte.class, byte.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_CHAR, C_CHAR, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addByteAndBytesFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    byteHandle1.set(structSegmt, (byte) 8);
    byteHandle2.set(structSegmt, (byte) 9);
    byte result = (byte) mh.invokeExact((byte) 6, structSegmt);
    Assert.assertEquals(result, 23);
    structSegmt.close();
}