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

Example 11 with VarHandle

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

the class TestVarHandleInfo method testAccessModes.

@Test
public void testAccessModes() throws NoSuchFieldException, IllegalAccessException {
    /* grab a VarHandle purely to check the accessModeType */
    // $NON-NLS-1$
    VarHandle vh = mylookup.findVarHandle(TestVarHandleInfo.class, "instanceField", Integer.class);
    for (String methName : accessModes) {
        logger.debug(methName);
        VarHandle.AccessMode am = VarHandle.AccessMode.valueFromMethodName(methName);
        MethodHandle mh = MethodHandles.varHandleExactInvoker(am, vh.accessModeType(am));
        checkMethodHandleInfo(mylookup.revealDirect(mh), infos.get(methName), methName);
        mh = MethodHandles.varHandleInvoker(am, vh.accessModeType(am));
        checkMethodHandleInfo(mylookup.revealDirect(mh), infos.get(methName), methName);
    }
}

Example 12 with VarHandle

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

the class StructTests method test_addIntFromPointerAndIntsFromStruct.

@Test
public void test_addIntFromPointerAndIntsFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_INT.withName("elem2"));
    VarHandle intHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
    VarHandle intHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(int.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_INT, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addIntFromPointerAndIntsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment intSegmt = MemorySegment.allocateNative(C_INT);
    MemoryAccess.setInt(intSegmt, 7654321);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt, 1234567);
    intHandle2.set(structSegmt, 2468024);
    int result = (int) mh.invokeExact(intSegmt.address(), structSegmt);
    Assert.assertEquals(result, 11356912);
    structSegmt.close();
    intSegmt.close();
}

Example 13 with VarHandle

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

the class StructTests method test_add2IntStructs_returnStruct.

@Test
public void test_add2IntStructs_returnStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_INT.withName("elem2"));
    VarHandle intHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
    VarHandle intHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add2IntStructs_returnStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt1, 11223344);
    intHandle2.set(structSegmt1, 55667788);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt2, 99001122);
    intHandle2.set(structSegmt2, 33445566);
    MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
    Assert.assertEquals(intHandle1.get(resultSegmt), 110224466);
    Assert.assertEquals(intHandle2.get(resultSegmt), 89113354);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 14 with VarHandle

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

the class StructTests method test_add2ByteStructs_returnStruct.

@Test
public void test_add2ByteStructs_returnStruct() 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(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add2ByteStructs_returnStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    byteHandle1.set(structSegmt1, (byte) 25);
    byteHandle2.set(structSegmt1, (byte) 11);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    byteHandle1.set(structSegmt2, (byte) 24);
    byteHandle2.set(structSegmt2, (byte) 13);
    MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
    Assert.assertEquals((byte) byteHandle1.get(resultSegmt), (byte) 49);
    Assert.assertEquals((byte) byteHandle2.get(resultSegmt), (byte) 24);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 15 with VarHandle

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

the class StructTests method test_add2BoolStructsWithXor_returnStruct.

@Test
public void test_add2BoolStructsWithXor_returnStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_INT.withName("elem2"));
    VarHandle boolHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
    VarHandle boolHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add2BoolStructsWithXor_returnStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    boolHandle1.set(structSegmt1, 1);
    boolHandle2.set(structSegmt1, 0);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    boolHandle1.set(structSegmt2, 1);
    boolHandle2.set(structSegmt2, 1);
    MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
    Assert.assertEquals(boolHandle1.get(resultSegmt), 0);
    Assert.assertEquals(boolHandle2.get(resultSegmt), 1);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}