Examples with FunctionDescriptor jdk.incubator.foreign.FunctionDescriptor used on opensource projects

Example 1 with FunctionDescriptor

use of jdk.incubator.foreign.FunctionDescriptor in project openj9 by eclipse.

the class StructTests method test_addCharAndCharsFromNestedStruct_reverseOrder.

@Test
public void test_addCharAndCharsFromNestedStruct_reverseOrder() throws Throwable {
    GroupLayout nestedStructLayout = MemoryLayout.ofStruct(C_SHORT.withName("elem1"), C_SHORT.withName("elem2"));
    GroupLayout structLayout = MemoryLayout.ofStruct(C_SHORT.withName("elem1"), nestedStructLayout.withName("struct_elem2"), MemoryLayout.ofPaddingBits(C_SHORT.bitSize()));
    MethodType mt = MethodType.methodType(char.class, char.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_SHORT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addCharAndCharsFromNestedStruct_reverseOrder").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    MemoryAccess.setCharAtOffset(structSegmt, 0, 'E');
    MemoryAccess.setCharAtOffset(structSegmt, 2, 'F');
    MemoryAccess.setCharAtOffset(structSegmt, 4, 'G');
    char result = (char) mh.invokeExact('H', structSegmt);
    Assert.assertEquals(result, 'W');
    structSegmt.close();
}

Example 2 with FunctionDescriptor

use of jdk.incubator.foreign.FunctionDescriptor in project openj9 by eclipse.

the class StructTests method test_addLongAndLongsFromStructWithNestedLongArray.

@Test
public void test_addLongAndLongsFromStructWithNestedLongArray() throws Throwable {
    SequenceLayout longArray = MemoryLayout.ofSequence(2, longLayout);
    GroupLayout structLayout = MemoryLayout.ofStruct(longArray.withName("array_elem1"), longLayout.withName("elem2"));
    MethodType mt = MethodType.methodType(long.class, long.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(longLayout, longLayout, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addLongAndLongsFromStructWithNestedLongArray").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    MemoryAccess.setLongAtOffset(structSegmt, 0, 111111111L);
    MemoryAccess.setLongAtOffset(structSegmt, 8, 222222222L);
    MemoryAccess.setLongAtOffset(structSegmt, 16, 333333333L);
    long result = (long) mh.invokeExact(444444444L, structSegmt);
    Assert.assertEquals(result, 1111111110L);
    structSegmt.close();
}

Example 3 with FunctionDescriptor

use of jdk.incubator.foreign.FunctionDescriptor in project openj9 by eclipse.

the class StructTests method test_addShortAndShortsFromStructWithNestedShortArray.

@Test
public void test_addShortAndShortsFromStructWithNestedShortArray() throws Throwable {
    SequenceLayout shortArray = MemoryLayout.ofSequence(2, C_SHORT);
    GroupLayout structLayout = MemoryLayout.ofStruct(shortArray.withName("array_elem1"), C_SHORT.withName("elem2"), MemoryLayout.ofPaddingBits(C_SHORT.bitSize()));
    MethodType mt = MethodType.methodType(short.class, short.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_SHORT, C_SHORT, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addShortAndShortsFromStructWithNestedShortArray").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    MemoryAccess.setShortAtOffset(structSegmt, 0, (short) 111);
    MemoryAccess.setShortAtOffset(structSegmt, 2, (short) 222);
    MemoryAccess.setShortAtOffset(structSegmt, 4, (short) 333);
    short result = (short) mh.invokeExact((short) 444, structSegmt);
    Assert.assertEquals(result, 1110);
    structSegmt.close();
}

Example 4 with FunctionDescriptor

use of jdk.incubator.foreign.FunctionDescriptor in project openj9 by eclipse.

the class StructTests method test_addDoubleAndDoublesFromStructWithNestedStructArray.

@Test
public void test_addDoubleAndDoublesFromStructWithNestedStructArray() throws Throwable {
    GroupLayout doubleStruct = MemoryLayout.ofStruct(C_DOUBLE.withName("elem1"), C_DOUBLE.withName("elem2"));
    SequenceLayout structArray = MemoryLayout.ofSequence(2, doubleStruct);
    GroupLayout structLayout = MemoryLayout.ofStruct(structArray.withName("struct_array_elem1"), C_DOUBLE.withName("elem2"));
    MethodType mt = MethodType.methodType(double.class, double.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_DOUBLE, C_DOUBLE, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addDoubleAndDoublesFromStructWithNestedStructArray").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    MemoryAccess.setDoubleAtOffset(structSegmt, 0, 111.111D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 8, 222.222D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 16, 333.333D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 24, 444.444D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 32, 555.555D);
    double result = (double) mh.invokeExact(666.666D, structSegmt);
    Assert.assertEquals(result, 2333.331D, 0.001D);
    structSegmt.close();
}

Example 5 with FunctionDescriptor

use of jdk.incubator.foreign.FunctionDescriptor in project openj9 by eclipse.

the class StructTests method test_addDoubleAndDoublesFromStructWithNestedDoubleArray_reverseOrder.

@Test
public void test_addDoubleAndDoublesFromStructWithNestedDoubleArray_reverseOrder() throws Throwable {
    SequenceLayout doubleArray = MemoryLayout.ofSequence(2, C_DOUBLE);
    GroupLayout structLayout = MemoryLayout.ofStruct(C_DOUBLE.withName("elem1"), doubleArray.withName("array_elem2"));
    MethodType mt = MethodType.methodType(double.class, double.class, MemorySegment.class);
    FunctionDescriptor fd = FunctionDescriptor.of(C_DOUBLE, C_DOUBLE, structLayout);
    Symbol functionSymbol = nativeLib.lookup("addDoubleAndDoublesFromStructWithNestedDoubleArray_reverseOrder").get();
    MethodHandle mh = clinker.downcallHandle(functionSymbol, mt, fd);
    MemorySegment structSegmt = MemorySegment.allocateNative(structLayout);
    MemoryAccess.setDoubleAtOffset(structSegmt, 0, 111.111D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 8, 222.222D);
    MemoryAccess.setDoubleAtOffset(structSegmt, 16, 333.333D);
    double result = (double) mh.invokeExact(444.444D, structSegmt);
    Assert.assertEquals(result, 1111.11D, 0.001D);
    structSegmt.close();
}