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

Example 26 with VarHandle

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

the class StructTests method test_addLongAndLongsFromStruct.

@Test
public void test_addLongAndLongsFromStruct() 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(long.class, long.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(longLayout, longLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addLongAndLongsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    longHandle1.set(structSegmt, 1234567890L);
    longHandle2.set(structSegmt, 9876543210L);
    long result = (long) mh.invokeExact(2468024680L, structSegmt);
    Assert.assertEquals(result, 13579135780L);
    structSegmt.close();
}

Example 27 with VarHandle

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

the class StructTests method test_addIntAndIntsFromStruct.

@Test
public void test_addIntAndIntsFromStruct() 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, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_INT, C_INT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addIntAndIntsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    intHandle1.set(structSegmt, 1122334);
    intHandle2.set(structSegmt, 1234567);
    int result = (int) mh.invokeExact(2244668, structSegmt);
    Assert.assertEquals(result, 4601569);
    structSegmt.close();
}

Example 28 with VarHandle

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

the class StructTests method test_addBoolFromPointerAndBoolsFromStructWithXor.

@Test
public void test_addBoolFromPointerAndBoolsFromStructWithXor() 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(boolean.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_INT, C_POINTER, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addBoolFromPointerAndBoolsFromStructWithXor").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment booleanSegmt = MemorySegment.allocateNative(C_INT);
    MemoryAccess.setInt(booleanSegmt, 1);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    boolHandle1.set(structSegmt, 0);
    boolHandle2.set(structSegmt, 1);
    boolean result = (boolean) mh.invokeExact(booleanSegmt.address(), structSegmt);
    Assert.assertEquals(result, false);
    booleanSegmt.close();
    structSegmt.close();
}

Example 29 with VarHandle

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

the class StructTests method test_addDoubleFromPointerAndDoublesFromStruct_returnDoublePointer.

@Test
public void test_addDoubleFromPointerAndDoublesFromStruct_returnDoublePointer() 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("addDoubleFromPointerAndDoublesFromStruct_returnDoublePointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment doubleSegmt = MemorySegment.allocateNative(C_DOUBLE);
    MemoryAccess.setDouble(doubleSegmt, 212.123D);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    doubleHandle1.set(structSegmt, 218.456D);
    doubleHandle2.set(structSegmt, 219.789D);
    MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(doubleSegmt.address(), structSegmt);
    MemorySegment resultSegmt = resultAddr.asSegmentRestricted(C_DOUBLE.byteSize());
    VarHandle doubleHandle = MemoryHandles.varHandle(double.class, ByteOrder.nativeOrder());
    double result = (double) doubleHandle.get(resultSegmt, 0);
    Assert.assertEquals(result, 650.368D, 0.001D);
    Assert.assertEquals(resultSegmt.address().toRawLongValue(), doubleSegmt.address().toRawLongValue());
    doubleSegmt.close();
    structSegmt.close();
    resultSegmt.close();
}

Example 30 with VarHandle

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

the class StructTests method test_addFloatAndFloatsFromStruct.

@Test
public void test_addFloatAndFloatsFromStruct() 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, float.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_FLOAT, C_FLOAT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addFloatAndFloatsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    floatHandle1.set(structSegmt, 8.12F);
    floatHandle2.set(structSegmt, 9.24F);
    float result = (float) mh.invokeExact(6.56F, structSegmt);
    Assert.assertEquals(result, 23.92F, 0.01F);
    structSegmt.close();
}