| // Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'dart:ffi'; |
| |
| import 'package:ffi/ffi.dart'; |
| |
| import 'coordinate.dart'; |
| import 'dylib_utils.dart'; |
| |
| typedef NativeCoordinateOp = Pointer<Coordinate> Function(Pointer<Coordinate>); |
| |
| typedef CoordinateTrice = Pointer<Coordinate> Function( |
| Pointer<NativeFunction<NativeCoordinateOp>>, Pointer<Coordinate>); |
| |
| typedef BinaryOp = int Function(int, int); |
| typedef NativeIntptrBinOp = IntPtr Function(IntPtr, IntPtr); |
| typedef NativeIntptrBinOpLookup = Pointer<NativeFunction<NativeIntptrBinOp>> |
| Function(); |
| |
| typedef NativeApplyTo42And74Type = IntPtr Function( |
| Pointer<NativeFunction<NativeIntptrBinOp>>); |
| |
| typedef ApplyTo42And74Type = int Function( |
| Pointer<NativeFunction<NativeIntptrBinOp>>); |
| |
| int myPlus(int a, int b) { |
| print("myPlus"); |
| print(a); |
| print(b); |
| return a + b; |
| } |
| |
| main() { |
| print('start main'); |
| |
| DynamicLibrary ffiTestFunctions = |
| dlopenPlatformSpecific("ffi_test_functions"); |
| |
| { |
| // Pass a c pointer to a c function as an argument to a c function. |
| Pointer<NativeFunction<NativeCoordinateOp>> transposeCoordinatePointer = |
| ffiTestFunctions.lookup("TransposeCoordinate"); |
| Pointer<NativeFunction<CoordinateTrice>> p2 = |
| ffiTestFunctions.lookup("CoordinateUnOpTrice"); |
| CoordinateTrice coordinateUnOpTrice = p2.asFunction(); |
| final c1 = calloc<Coordinate>() |
| ..ref.x = 10.0 |
| ..ref.y = 20.0; |
| c1.ref.next = c1; |
| Coordinate result = coordinateUnOpTrice(transposeCoordinatePointer, c1).ref; |
| print(result.runtimeType); |
| print(result.x); |
| print(result.y); |
| calloc.free(c1); |
| } |
| |
| { |
| // Return a c pointer to a c function from a c function. |
| Pointer<NativeFunction<NativeIntptrBinOpLookup>> p14 = |
| ffiTestFunctions.lookup("IntptrAdditionClosure"); |
| NativeIntptrBinOpLookup intptrAdditionClosure = p14.asFunction(); |
| |
| Pointer<NativeFunction<NativeIntptrBinOp>> intptrAdditionPointer = |
| intptrAdditionClosure(); |
| BinaryOp intptrAddition = intptrAdditionPointer.asFunction(); |
| print(intptrAddition(10, 27)); |
| } |
| |
| { |
| Pointer<NativeFunction<NativeIntptrBinOp>> pointer = |
| Pointer.fromFunction(myPlus, 0); |
| print(pointer); |
| |
| Pointer<NativeFunction<NativeApplyTo42And74Type>> p17 = |
| ffiTestFunctions.lookup("ApplyTo42And74"); |
| ApplyTo42And74Type applyTo42And74 = p17.asFunction(); |
| |
| int result = applyTo42And74(pointer); |
| print(result); |
| } |
| |
| print("end main"); |
| } |