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

Example 16 with VarHandle

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

the class StructTests method test_add2BoolStructsWithXor_returnStructPointer.

@Test
public void test_add2BoolStructsWithXor_returnStructPointer() 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(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add2BoolStructsWithXor_returnStructPointer").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);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(structSegmt1.address(), structSegmt2);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(structLayout.byteSize());
    Assert.assertEquals(boolHandle1.get(resultSegmt), 0);
    Assert.assertEquals(boolHandle2.get(resultSegmt), 1);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 17 with VarHandle

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

the class StructTests method test_addIntAndShortIntFromStruct.

@Test
public void test_addIntAndShortIntFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_SHORT.withName("elem1"), MemoryLayout.ofPaddingBits(C_SHORT.bitSize()), C_INT.withName("elem2"));
    VarHandle elemHandle1 = structLayout.varHandle(short.class, PathElement.groupElement("elem1"));
    VarHandle elemHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(int.class, int.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_INT, C_INT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addIntAndShortIntFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    elemHandle1.set(structSegmt, (short) 32766);
    elemHandle2.set(structSegmt, 22446688);
    int result = (int) mh.invokeExact(11335577, structSegmt);
    Assert.assertEquals(result, 33815031);
    structSegmt.close();
}

Example 18 with VarHandle

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

the class StructTests method test_addShortFromPointerAndShortsFromStruct.

@Test
public void test_addShortFromPointerAndShortsFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_SHORT.withName("elem1"), C_SHORT.withName("elem2"));
    VarHandle shortHandle1 = structLayout.varHandle(short.class, PathElement.groupElement("elem1"));
    VarHandle shortHandle2 = structLayout.varHandle(short.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(short.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addShortFromPointerAndShortsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment shortSegmt = MemorySegment.allocateNative(C_SHORT);
    MemoryAccess.setShort(shortSegmt, (short) 12);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    shortHandle1.set(structSegmt, (short) 18);
    shortHandle2.set(structSegmt, (short) 19);
    short result = (short) mh.invokeExact(shortSegmt.address(), structSegmt);
    Assert.assertEquals(result, 49);
    shortSegmt.close();
    structSegmt.close();
}

Example 19 with VarHandle

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

the class StructTests method test_add2ByteStructs_returnStructPointer.

@Test
public void test_add2ByteStructs_returnStructPointer() 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("add2ByteStructs_returnStructPointer").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);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(structSegmt1.address(), structSegmt2);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(structLayout.byteSize());
    Assert.assertEquals((byte) byteHandle1.get(resultSegmt), (byte) 49);
    Assert.assertEquals((byte) byteHandle2.get(resultSegmt), (byte) 24);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 20 with VarHandle

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

the class StructTests method test_addFloatFromPointerAndFloatsFromStruct.

@Test
public void test_addFloatFromPointerAndFloatsFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_FLOAT.withName("elem1"), C_FLOAT.withName("elem2"));
    VarHandle floatHandle1 = structLayout.varHandle(float.class, PathElement.groupElement("elem1"));
    VarHandle floatHandle2 = structLayout.varHandle(float.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(float.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_FLOAT, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addFloatFromPointerAndFloatsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment floatSegmt = MemorySegment.allocateNative(C_FLOAT);
    MemoryAccess.setFloat(floatSegmt, 12.12F);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    floatHandle1.set(structSegmt, 18.23F);
    floatHandle2.set(structSegmt, 19.34F);
    float result = (float) mh.invokeExact(floatSegmt.address(), structSegmt);
    Assert.assertEquals(result, 49.69F, 0.01F);
    structSegmt.close();
    floatSegmt.close();
}