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

Example 21 with VarHandle

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

the class StructTests method test_add2DoubleStructs_returnStructPointer.

@Test
public void test_add2DoubleStructs_returnStructPointer() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_DOUBLE.withName("elem1"), C_DOUBLE.withName("elem2"));
    VarHandle doubleHandle1 = structLayout.varHandle(double.class, PathElement.groupElement("elem1"));
    VarHandle doubleHandle2 = structLayout.varHandle(double.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("add2DoubleStructs_returnStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    doubleHandle1.set(structSegmt1, 11.222D);
    doubleHandle2.set(structSegmt1, 22.333D);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    doubleHandle1.set(structSegmt2, 33.444D);
    doubleHandle2.set(structSegmt2, 44.555D);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(structSegmt1.address(), structSegmt2);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(structLayout.byteSize());
    Assert.assertEquals((double) doubleHandle1.get(resultSegmt), 44.666D, 0.001D);
    Assert.assertEquals((double) doubleHandle2.get(resultSegmt), 66.888D, 0.001D);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 22 with VarHandle

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

the class StructTests method test_addIntAndIntsFromStructPointer.

@Test
public void test_addIntAndIntsFromStructPointer() 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, int.class, MemoryAddress.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_INT, C_INT, C_POINTER);
    Symbol functionSymbol = nativeLib.lookup("addIntAndIntsFromStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt, 11121314);
    intHandle2.set(structSegmt, 15161718);
    int result = (int) mh.invokeExact(19202122, structSegmt.address());
    Assert.assertEquals(result, 45485154);
    structSegmt.close();
}

Example 23 with VarHandle

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

the class StructTests method test_addCharFromPointerAndCharsFromStruct_returnCharPointer.

@Test
public void test_addCharFromPointerAndCharsFromStruct_returnCharPointer() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_SHORT.withName("elem1"), C_SHORT.withName("elem2"));
    VarHandle charHandle1 = structLayout.varHandle(char.class, PathElement.groupElement("elem1"));
    VarHandle charHandle2 = structLayout.varHandle(char.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("addCharFromPointerAndCharsFromStruct_returnCharPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment charSegmt = MemorySegment.allocateNative(C_SHORT);
    MemoryAccess.setChar(charSegmt, 'D');
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    charHandle1.set(structSegmt, 'E');
    charHandle2.set(structSegmt, 'F');
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(charSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(C_SHORT.byteSize());
    VarHandle charHandle = MemoryHandles.varHandle(char.class, ByteOrder.nativeOrder());
    char result = (char) charHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 'M');
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), charSegmt.address().toRawLongValue());
    charSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}

Example 24 with VarHandle

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

the class StructTests method test_addShortFromPointerAndShortsFromStruct_returnShortPointer.

@Test
public void test_addShortFromPointerAndShortsFromStruct_returnShortPointer() 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(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addShortFromPointerAndShortsFromStruct_returnShortPointer").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);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(shortSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(C_SHORT.byteSize());
    VarHandle shortHandle = MemoryHandles.varHandle(short.class, ByteOrder.nativeOrder());
    short result = (short) shortHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 49);
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), shortSegmt.address().toRawLongValue());
    shortSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}

Example 25 with VarHandle

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

the class StructTests method test_addIntFromPointerAndIntsFromStruct_returnIntPointer.

@Test
public void test_addIntFromPointerAndIntsFromStruct_returnIntPointer() 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(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addIntFromPointerAndIntsFromStruct_returnIntPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment intSegmt = MemorySegment.allocateNative(C_INT);
    MemoryAccess.setInt(intSegmt, 1122333);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt, 4455666);
    intHandle2.set(structSegmt, 7788999);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(intSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(C_INT.byteSize());
    VarHandle intHandle = MemoryHandles.varHandle(int.class, ByteOrder.nativeOrder());
    int result = (int) intHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 13366998);
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), intSegmt.address().toRawLongValue());
    intSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}