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

Example 36 with VarHandle

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

the class StructTests method test_add3BoolStructsWithXor_returnStruct.

@Test
public void test_add3BoolStructsWithXor_returnStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_INT.withName("elem2"), C_INT.withName("elem3"));
    VarHandle boolHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
    VarHandle boolHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    VarHandle boolHandle3 = structLayout.varHandle(int.class, PathElement.groupElement("elem3"));
    MethodType mt = MethodType.methodType(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add3BoolStructsWithXor_returnStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    boolHandle1.set(structSegmt1, 1);
    boolHandle2.set(structSegmt1, 0);
    boolHandle3.set(structSegmt1, 1);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    boolHandle1.set(structSegmt2, 1);
    boolHandle2.set(structSegmt2, 1);
    boolHandle3.set(structSegmt2, 0);
    MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
    Assert.assertEquals(boolHandle1.get(resultSegmt), 0);
    Assert.assertEquals(boolHandle2.get(resultSegmt), 1);
    Assert.assertEquals(boolHandle3.get(resultSegmt), 1);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 37 with VarHandle

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

the class StructTests method test_addIntAndIntShortFromStruct.

@Test
public void test_addIntAndIntShortFromStruct() throws Throwable {
    GroupLayout structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_SHORT.withName("elem2"), MemoryLayout.ofPaddingBits(C_SHORT.bitSize()));
    VarHandle elemHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
    VarHandle elemHandle2 = structLayout.varHandle(short.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("addIntAndIntShortFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    elemHandle1.set(structSegmt, 11223344);
    elemHandle2.set(structSegmt, (short) 32766);
    int result = (int) mh.invokeExact(22334455, structSegmt);
    Assert.assertEquals(result, 33590565);
    structSegmt.close();
}

Example 38 with VarHandle

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

the class StructTests method test_addByteFromPointerAndBytesFromStruct.

@Test
public void test_addByteFromPointerAndBytesFromStruct() 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, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_CHAR, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addByteFromPointerAndBytesFromStruct").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) 14);
    byteHandle2.set(structSegmt, (byte) 16);
    byte result = (byte) mh.invokeExact(byteSegmt.address(), structSegmt);
    Assert.assertEquals(result, 42);
    byteSegmt.close();
    structSegmt.close();
}

Example 39 with VarHandle

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

the class StructTests method test_add2FloatStructs_returnStruct.

@Test
public void test_add2FloatStructs_returnStruct() 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(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("add2FloatStructs_returnStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt1 = MemorySegment.allocateNative(structLayout);
    floatHandle1.set(structSegmt1, 25.12F);
    floatHandle2.set(structSegmt1, 11.23F);
    MemorySegment structSegmt2 = MemorySegment.allocateNative(structLayout);
    floatHandle1.set(structSegmt2, 24.34F);
    floatHandle2.set(structSegmt2, 13.45F);
    MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
    Assert.assertEquals((float) floatHandle1.get(resultSegmt), 49.46F, 0.01F);
    Assert.assertEquals((float) floatHandle2.get(resultSegmt), 24.68F, 0.01F);
    structSegmt1.close();
    structSegmt2.close();
    resultSegmt.close();
}

Example 40 with VarHandle

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

the class StructTests method test_addDoubleAndIntDoubleFromStruct.

@Test
public void test_addDoubleAndIntDoubleFromStruct() throws Throwable {
    GroupLayout structLayout = null;
    MemorySegment structSegmt = null;
    /* The size of [int, double] on AIX/PPC 64-bit is 12 bytes without padding by default
		 * while the same struct is 16 bytes with padding on other platforms.
		 */
    if (isAixOS) {
        structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), C_DOUBLE.withName("elem2"));
        structSegmt = MemorySegment.allocateNative(structLayout);
        MemoryAccess.setIntAtOffset(structSegmt, 0, 18);
        MemoryAccess.setDoubleAtOffset(structSegmt, 4, 619.777D);
    } else {
        structLayout = MemoryLayout.ofStruct(C_INT.withName("elem1"), MemoryLayout.ofPaddingBits(C_INT.bitSize()), C_DOUBLE.withName("elem2"));
        VarHandle elemHandle1 = structLayout.varHandle(int.class, PathElement.groupElement("elem1"));
        VarHandle elemHandle2 = structLayout.varHandle(double.class, PathElement.groupElement("elem2"));
        structSegmt = MemorySegment.allocateNative(structLayout);
        elemHandle1.set(structSegmt, 18);
        elemHandle2.set(structSegmt, 619.777D);
    }
    MethodType mt = MethodType.methodType(double.class, double.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_DOUBLE, C_DOUBLE, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addDoubleAndIntDoubleFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    double result = (double) mh.invokeExact(113.567D, structSegmt);
    Assert.assertEquals(result, 751.344D, 0.001D);
    structSegmt.close();
}