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

Example 86 with VarHandle

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

the class StructTests2 method test_addCharFromPointerAndCharsFromStruct_2.

@Test
public void test_addCharFromPointerAndCharsFromStruct_2() 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(char.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_POINTER, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addCharFromPointerAndCharsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(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');
        char result = (char) mh.invokeExact(functionSymbol, charSegmt.address(), structSegmt);
        Assert.assertEquals(result, 'M');
    }
}

Example 87 with VarHandle

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

the class StructTests2 method test_add3FloatStructs_returnStruct_2.

@Test
public void test_add3FloatStructs_returnStruct_2() 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(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(functionSymbol, allocator, 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);
    }
}

Example 88 with VarHandle

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

the class StructTests2 method test_addShortFromPointerAndShortsFromStruct_2.

@Test
public void test_addShortFromPointerAndShortsFromStruct_2() 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(short.class, MemoryAddress.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_POINTER, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addShortFromPointerAndShortsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(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);
        short result = (short) mh.invokeExact(functionSymbol, shortSegmt.address(), structSegmt);
        Assert.assertEquals(result, 49);
    }
}

Example 89 with VarHandle

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

the class StructTests2 method test_addShortAndShortsFromStruct_2.

@Test
public void test_addShortAndShortsFromStruct_2() 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(short.class, short.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_SHORT, structLayout);
    Addressable functionSymbol = nativeLibLookup.lookup("addShortAndShortsFromStruct").get();
    MethodHandle mh = clinker.downcallHandle(mt, fd);
    try (ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.ofScope(scope);
        MemorySegment structSegmt = allocator.allocate(structLayout);
        shortHandle1.set(structSegmt, (short) 8);
        shortHandle2.set(structSegmt, (short) 9);
        short result = (short) mh.invokeExact(functionSymbol, (short) 6, structSegmt);
        Assert.assertEquals(result, 23);
    }
}

Example 90 with VarHandle

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

the class StructTests2 method test_addFloatFromPointerAndFloatsFromStruct_2.

@Test
public void test_addFloatFromPointerAndFloatsFromStruct_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(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(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(functionSymbol, floatSegmt.address(), structSegmt);
        Assert.assertEquals(result, 49.69F, 0.01F);
    }
}