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

Example 61 with VarHandle

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

the class StructTests1 method test_addDoubleAndIntDoubleFromStruct_1.

@Test
public void test_addDoubleAndIntDoubleFromStruct_1() throws Throwable {
    GroupLayout structLayout = null;
    MemorySegment structSegmt = null;
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        /* 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.structLayout(C_INT.withName("elem1"), C_DOUBLE.withName("elem2"));
            structSegmt = allocator.allocate(structLayout);
            MemoryAccess.setIntAtOffset(structSegmt, 0, 18);
            MemoryAccess.setDoubleAtOffset(structSegmt, 4, 619.777D);
        } else {
            structLayout = MemoryLayout.structLayout(C_INT.withName("elem1"), MemoryLayout.paddingLayout(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 = allocator.allocate(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);
        Addressable functionSymbol = nativeLibLookup.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);
    }
}

Example 62 with VarHandle

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

the class StructTests1 method test_addShortFromPointerAndShortsFromStruct_returnShortPointer_1.

@Test
public void test_addShortFromPointerAndShortsFromStruct_returnShortPointer_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(MemoryAddress.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_POINTER, C_POINTER, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addShortFromPointerAndShortsFromStruct_returnShortPointer").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment shortSegmt = allocator.allocate(C_SHORT);
        MemoryAccess.setShort(shortSegmt, (short) 12);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        shortHandle1.set(structSegmt, (short) 18);
        shortHandle2.set(structSegmt, (short) 19);
        MemoryAddress resultAddr = (MemoryAddress) mh.invokeExact(shortSegmt.address(), structSegmt);
        MemorySegment resultSegmt = resultAddr.asSegment(C_SHORT.byteSize(), scope);
        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());
    }
}

Example 63 with VarHandle

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

the class StructTests1 method test_addFloatFromPointerAndFloatsFromStruct_1.

@Test
public void test_addFloatFromPointerAndFloatsFromStruct_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, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_FLOAT, C_POINTER, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addFloatFromPointerAndFloatsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, 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);
        float result = (float) mh.invokeExact(floatSegmt.address(), structSegmt);
        Assert.assertEquals(result, 49.69F, 0.01F);
    }
}

Example 64 with VarHandle

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

the class StructTests1 method test_addDoubleAndDoubleIntFromStruct_1.

@Test
public void test_addDoubleAndDoubleIntFromStruct_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(C_DOUBLE.withName("elem1"), C_INT.withName("elem2"));
    VarHandle elemHandle1 = structLayout.varHandle(double.class, PathElement.groupElement("elem1"));
    VarHandle elemHandle2 = structLayout.varHandle(int.class, PathElement.groupElement("elem2"));
    MethodType mt = MethodType.methodType(double.class, double.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_DOUBLE, C_DOUBLE, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addDoubleAndDoubleIntFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        elemHandle1.set(structSegmt, 218.555D);
        elemHandle2.set(structSegmt, 19);
        double result = (double) mh.invokeExact(216.666D, structSegmt);
        Assert.assertEquals(result, 454.221D, 0.001D);
    }
}

Example 65 with VarHandle

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

the class StructTests1 method test_add3CharStructs_returnStruct_1.

@Test
public void test_add3CharStructs_returnStruct_1() throws Throwable {
    GroupLayout structLayout = MemoryLayout.structLayout(C_SHORT.withName("elem1"), C_SHORT.withName("elem2"), C_SHORT.withName("elem3"));
    VarHandle charHandle1 = structLayout.varHandle(char.class, PathElement.groupElement("elem1"));
    VarHandle charHandle2 = structLayout.varHandle(char.class, PathElement.groupElement("elem2"));
    VarHandle charHandle3 = structLayout.varHandle(char.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("add3CharStructs_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);
        charHandle1.set(structSegmt1, 'A');
        charHandle2.set(structSegmt1, 'B');
        charHandle3.set(structSegmt1, 'C');
        MemorySegment structSegmt2 = allocator.allocate(structLayout);
        charHandle1.set(structSegmt2, 'B');
        charHandle2.set(structSegmt2, 'C');
        charHandle3.set(structSegmt2, 'D');
        MemorySegment resultSegmt = (MemorySegment) mh.invokeExact(structSegmt1, structSegmt2);
        Assert.assertEquals(charHandle1.get(resultSegmt), 'B');
        Assert.assertEquals(charHandle2.get(resultSegmt), 'D');
        Assert.assertEquals(charHandle3.get(resultSegmt), 'F');
    }
}