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

Example 96 with VarHandle

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

the class StructTests2 method test_addByteAndBytesFromStructPointer_2.

@Test
public void test_addByteAndBytesFromStructPointer_2() 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(byte.class, byte.class, MemoryAddress.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_CHAR, C_CHAR, C_POINTER);
    Addressable functionSymbol = nativeLibLookup.lookup("addByteAndBytesFromStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        byteHandle1.set(structSegmt, (byte) 11);
        byteHandle2.set(structSegmt, (byte) 12);
        byte result = (byte) mh.invokeExact(functionSymbol, (byte) 13, structSegmt.address());
        Assert.assertEquals(result, 36);
    }
}

Example 97 with VarHandle

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

the class StructTests2 method test_addFloatFromPointerAndFloatsFromStruct_returnFloatPointer_2.

@Test
public void test_addFloatFromPointerAndFloatsFromStruct_returnFloatPointer_2() 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(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addFloatFromPointerAndFloatsFromStruct_returnFloatPointer").get();
    MethodHandle mh = clinker.downcallHandle(mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment floatSegmt = allocator.allocate(C_FLOAT);
        MemoryAccess.setFloat(floatSegmt, 12.12F);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        floatHandle1.set(structSegmt, 18.23F);
        floatHandle2.set(structSegmt, 19.34F);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(functionSymbol, floatSegmt.address(), structSegmt);
        MemorySegment resultSegmt = resultAddr.asSegment(C_FLOAT.byteSize(), scope);
        VarHandle floatHandle = MemoryHandles.varHandle(float.class, ByteOrder.nativeOrder());
        float result = (float) floatHandle.get(resultSegmt, 0);
        Assert.assertEquals(result, 49.69F, 0.01F);
        Assert.assertEquals(resultSegmt.address().toRawLongValue(), floatSegmt.address().toRawLongValue());
    }
}

Example 98 with VarHandle

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

the class StructTests2 method test_add2IntStructs_returnStructPointer_2.

@Test
public void test_add2IntStructs_returnStructPointer_2() 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("add2IntStructs_returnStructPointer").get();
    MethodHandle mh = clinker.downcallHandle(mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt1 = allocator.allocate(structLayout);
        intHandle1.set(structSegmt1, 11223344);
        intHandle2.set(structSegmt1, 55667788);
        MemorySegment structSegmt2 = allocator.allocate(structLayout);
        intHandle1.set(structSegmt2, 99001122);
        intHandle2.set(structSegmt2, 33445566);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(functionSymbol, structSegmt1.address(), structSegmt2);
        MemorySegment resultSegmt = resultAddr.asSegment(structLayout.byteSize(), scope);
        Assert.assertEquals(intHandle1.get(resultSegmt), 110224466);
        Assert.assertEquals(intHandle2.get(resultSegmt), 89113354);
    }
}

Example 99 with VarHandle

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

the class StructTests1 method test_addCharFromPointerAndCharsFromStruct_returnCharPointer_1.

@Test
public void test_addCharFromPointerAndCharsFromStruct_returnCharPointer_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(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);
    Addressable functionSymbol = nativeLibLookup.lookup("addCharFromPointerAndCharsFromStruct_returnCharPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment charSegmt = allocator.allocate(C_SHORT);
        MemoryAccess.setChar(charSegmt, 'D');
        MemorySegment structSegmt = allocator.allocate(structLayout);
        charHandle1.set(structSegmt, 'E');
        charHandle2.set(structSegmt, 'F');
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(charSegmt.address(), structSegmt);
        MemorySegment resultSegmt = resultAddr.asSegment(C_SHORT.byteSize(), scope);
        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());
    }
}

Example 100 with VarHandle

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

the class StructTests1 method test_add3FloatStructs_returnStruct_1.

@Test
public void test_add3FloatStructs_returnStruct_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(C_FLOAT.withName("elem1"), C_FLOAT.withName("elem2"), C_FLOAT.withName("elem3"));
    VarHandle floatHandle1 = structLayout.varHandle(float.class, PathElement.groupElement("elem1"));
    VarHandle floatHandle2 = structLayout.varHandle(float.class, PathElement.groupElement("elem2"));
    VarHandle floatHandle3 = structLayout.varHandle(float.class, PathElement.groupElement("elem3"));
    MethodType mt = MethodType.methodType(MemorySegment.class, MemorySegment.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(structLayout, structLayout, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("add3FloatStructs_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);
        floatHandle1.set(structSegmt1, 25.12F);
        floatHandle2.set(structSegmt1, 11.23F);
        floatHandle3.set(structSegmt1, 45.67F);
        MemorySegment structSegmt2 = allocator.allocate(structLayout);
        floatHandle1.set(structSegmt2, 24.34F);
        floatHandle2.set(structSegmt2, 13.45F);
        floatHandle3.set(structSegmt2, 69.72F);
        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);
        Assert.assertEquals((float) floatHandle3.get(resultSegmt), 115.39, 0.01F);
    }
}