| // 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' as ffi; |
| |
| import 'dylib_utils.dart'; |
| |
| import 'coordinate.dart'; |
| |
| typedef NativeCoordinateOp = Coordinate Function(Coordinate); |
| |
| typedef CoordinateTrice = Coordinate Function( |
| ffi.Pointer<ffi.NativeFunction<NativeCoordinateOp>>, Coordinate); |
| |
| typedef BinaryOp = int Function(int, int); |
| typedef NativeIntptrBinOp = ffi.IntPtr Function(ffi.IntPtr, ffi.IntPtr); |
| typedef NativeIntptrBinOpLookup |
| = ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOp>> Function(); |
| |
| typedef NativeApplyTo42And74Type = ffi.IntPtr Function( |
| ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOp>>); |
| |
| typedef ApplyTo42And74Type = int Function( |
| ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOp>>); |
| |
| int myPlus(int a, int b) { |
| print("myPlus"); |
| print(a); |
| print(b); |
| return a + b; |
| } |
| |
| main(List<String> arguments) { |
| print('start main'); |
| |
| ffi.DynamicLibrary ffiTestFunctions = |
| dlopenPlatformSpecific("ffi_test_functions"); |
| |
| { |
| // pass a c pointer to a c function as an argument to a c function |
| ffi.Pointer<ffi.NativeFunction<NativeCoordinateOp>> |
| transposeCoordinatePointer = |
| ffiTestFunctions.lookup("TransposeCoordinate"); |
| ffi.Pointer<ffi.NativeFunction<CoordinateTrice>> p2 = |
| ffiTestFunctions.lookup("CoordinateUnOpTrice"); |
| CoordinateTrice coordinateUnOpTrice = p2.asFunction(); |
| Coordinate c1 = Coordinate(10.0, 20.0, null); |
| c1.next = c1; |
| Coordinate result = coordinateUnOpTrice(transposeCoordinatePointer, c1); |
| print(result.runtimeType); |
| print(result.x); |
| print(result.y); |
| } |
| |
| { |
| // return a c pointer to a c function from a c function |
| ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOpLookup>> p14 = |
| ffiTestFunctions.lookup("IntptrAdditionClosure"); |
| NativeIntptrBinOpLookup intptrAdditionClosure = p14.asFunction(); |
| |
| ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOp>> intptrAdditionPointer = |
| intptrAdditionClosure(); |
| BinaryOp intptrAddition = intptrAdditionPointer.asFunction(); |
| print(intptrAddition(10, 27)); |
| } |
| |
| { |
| ffi.Pointer<ffi.NativeFunction<NativeIntptrBinOp>> pointer = |
| ffi.fromFunction(myPlus); |
| print(pointer); |
| |
| ffi.Pointer<ffi.NativeFunction<NativeApplyTo42And74Type>> p17 = |
| ffiTestFunctions.lookup("ApplyTo42And74"); |
| ApplyTo42And74Type applyTo42And74 = p17.asFunction(); |
| |
| // int result = applyTo42And74(pointer); |
| // print(result); |
| } |
| |
| print("end main"); |
| } |