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

Example 46 with VarHandle

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

the class StructTests1 method test_add2DoubleStructs_returnStructPointer_1.

@Test
public void test_add2DoubleStructs_returnStructPointer_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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);
    Addressable functionSymbol = nativeLibLookup.lookup("add2DoubleStructs_returnStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt1 = allocator.allocate(structLayout);
        doubleHandle1.set(structSegmt1, 11.222D);
        doubleHandle2.set(structSegmt1, 22.333D);
        MemorySegment structSegmt2 = allocator.allocate(structLayout);
        doubleHandle1.set(structSegmt2, 33.444D);
        doubleHandle2.set(structSegmt2, 44.555D);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(structSegmt1.address(), structSegmt2);
        MemorySegment resultSegmt = resultAddr.asSegment(structLayout.byteSize(), scope);
        Assert.assertEquals((double) doubleHandle1.get(resultSegmt), 44.666D, 0.001D);
        Assert.assertEquals((double) doubleHandle2.get(resultSegmt), 66.888D, 0.001D);
    }
}

Example 47 with VarHandle

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

the class StructTests1 method test_add2ShortStructs_returnStruct_1.

@Test
public void test_add2ShortStructs_returnStruct_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("add2ShortStructs_returnStruct").get();
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MethodHandle mh = clinker.downcallHandle(functionSymbol, allocator, mt, fd);
        MemorySegment structSegmt1 = allocator.allocate(structLayout);
        shortHandle1.set(structSegmt1, (short) 56);
        shortHandle2.set(structSegmt1, (short) 45);
        MemorySegment structSegmt2 = allocator.allocate(structLayout);
        shortHandle1.set(structSegmt2, (short) 78);
        shortHandle2.set(structSegmt2, (short) 67);
        MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
        Assert.assertEquals((short) shortHandle1.get(resultSegmt), (short) 134);
        Assert.assertEquals((short) shortHandle2.get(resultSegmt), (short) 112);
    }
}

Example 48 with VarHandle

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

the class StructTests1 method test_addIntFromPointerAndIntsFromStruct_returnIntPointer_1.

@Test
public void test_addIntFromPointerAndIntsFromStruct_returnIntPointer_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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);
    Addressable functionSymbol = nativeLibLookup.lookup("addIntFromPointerAndIntsFromStruct_returnIntPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment intSegmt = allocator.allocate(C_INT);
        MemoryAccess.setInt(intSegmt, 1122333);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        intHandle1.set(structSegmt, 4455666);
        intHandle2.set(structSegmt, 7788999);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(intSegmt.address(), structSegmt);
        MemorySegment resultSegmt = resultAddr.asSegment(C_INT.byteSize(), scope);
        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());
    }
}

Example 49 with VarHandle

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

the class StructTests1 method test_addByteFromPointerAndBytesFromStruct_returnBytePointer_1.

@Test
public void test_addByteFromPointerAndBytesFromStruct_returnBytePointer_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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);
    Addressable functionSymbol = nativeLibLookup.lookup("addByteFromPointerAndBytesFromStruct_returnBytePointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment byteSegmt = allocator.allocate(C_CHAR);
        MemoryAccess.setByte(byteSegmt, (byte) 12);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        byteHandle1.set(structSegmt, (byte) 18);
        byteHandle2.set(structSegmt, (byte) 19);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(byteSegmt.address(), structSegmt);
        MemorySegment resultSegmt = resultAddr.asSegment(C_CHAR.byteSize(), scope);
        VarHandle byteHandle = MemoryHandles.varHandle(byte.class, ByteOrder.nativeOrder());
        byte result = (byte) byteHandle.get(resultSegmt, 0);
        Assert.assertEquals(result, 49);
        Assert.assertEquals(resultSegmt.address().toRawLongValue(), byteSegmt.address().toRawLongValue());
    }
}

Example 50 with VarHandle

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

the class StructTests1 method test_addFloatAndFloatsFromStructPointer_1.

@Test
public void test_addFloatAndFloatsFromStructPointer_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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, MemoryAddress.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_FLOAT, C_FLOAT, C_POINTER);
    Addressable functionSymbol = nativeLibLookup.lookup("addFloatAndFloatsFromStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        floatHandle1.set(structSegmt, 35.11F);
        floatHandle2.set(structSegmt, 46.22F);
        float result = (float) mh.invokeExact(79.33F, structSegmt.address());
        Assert.assertEquals(result, 160.66F, 0.01F);
    }
}