Daco Harkes
a45276ab91
This can only be landed when `Allocator`, `Opaque`, and `AllocatorAlloc` have rolled into Flutter/engine, that into Flutter/flutter, and into g3. Deletes all the copies of `_CallocAllocator` and uses the one from `package:ffi` instead. Bug: https://github.com/dart-lang/sdk/issues/44622 Bug: https://github.com/dart-lang/sdk/issues/43974 Bug: https://github.com/dart-lang/sdk/issues/44621 Bug: https://github.com/dart-lang/sdk/issues/38721 Change-Id: I486034b379b5a63cad4aefd503ccd0f2ce5dd45e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/180188 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Aske Simon Christensen <askesc@google.com>
125 lines
3.4 KiB
Dart
125 lines
3.4 KiB
Dart
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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//
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// Dart test program for testing dart:ffi function pointers with struct
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// arguments.
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//
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// SharedObjects=ffi_test_functions
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import 'dart:ffi';
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import "package:expect/expect.dart";
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import "package:ffi/ffi.dart";
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import 'coordinate.dart';
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import 'dylib_utils.dart';
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import 'very_large_struct.dart';
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typedef NativeCoordinateOp = Pointer<Coordinate> Function(Pointer<Coordinate>);
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void main() {
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testFunctionWithStruct();
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testFunctionWithStructArray();
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testFunctionWithVeryLargeStruct();
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}
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DynamicLibrary ffiTestFunctions = dlopenPlatformSpecific("ffi_test_functions");
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/// pass a struct to a c function and get a struct as return value
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void testFunctionWithStruct() {
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Pointer<NativeFunction<NativeCoordinateOp>> p1 =
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ffiTestFunctions.lookup("TransposeCoordinate");
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NativeCoordinateOp f1 = p1.asFunction();
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final c1 = calloc<Coordinate>()
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..ref.x = 10.0
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..ref.y = 20.0;
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final c2 = calloc<Coordinate>()
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..ref.x = 42.0
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..ref.y = 84.0
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..ref.next = c1;
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c1.ref.next = c2;
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Coordinate result = f1(c1).ref;
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Expect.approxEquals(20.0, c1.ref.x);
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Expect.approxEquals(30.0, c1.ref.y);
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Expect.approxEquals(42.0, result.x);
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Expect.approxEquals(84.0, result.y);
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calloc.free(c1);
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calloc.free(c2);
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}
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/// pass an array of structs to a c funtion
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void testFunctionWithStructArray() {
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Pointer<NativeFunction<NativeCoordinateOp>> p1 =
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ffiTestFunctions.lookup("CoordinateElemAt1");
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NativeCoordinateOp f1 = p1.asFunction();
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final coordinateArray = calloc<Coordinate>(3);
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Coordinate c1 = coordinateArray[0];
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Coordinate c2 = coordinateArray[1];
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Coordinate c3 = coordinateArray[2];
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c1.x = 10.0;
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c1.y = 10.0;
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c1.next = coordinateArray.elementAt(2);
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c2.x = 20.0;
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c2.y = 20.0;
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c2.next = coordinateArray.elementAt(0);
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c3.x = 30.0;
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c3.y = 30.0;
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c3.next = coordinateArray.elementAt(1);
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Coordinate result = f1(coordinateArray.elementAt(0)).ref;
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Expect.approxEquals(20.0, result.x);
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Expect.approxEquals(20.0, result.y);
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calloc.free(coordinateArray);
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}
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typedef VeryLargeStructSum = int Function(Pointer<VeryLargeStruct>);
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typedef NativeVeryLargeStructSum = Int64 Function(Pointer<VeryLargeStruct>);
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void testFunctionWithVeryLargeStruct() {
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Pointer<NativeFunction<NativeVeryLargeStructSum>> p1 =
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ffiTestFunctions.lookup("SumVeryLargeStruct");
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VeryLargeStructSum f = p1.asFunction();
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final vlsArray = calloc<VeryLargeStruct>(2);
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VeryLargeStruct vls1 = vlsArray[0];
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VeryLargeStruct vls2 = vlsArray[1];
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List<VeryLargeStruct> structs = [vls1, vls2];
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for (VeryLargeStruct struct in structs) {
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struct.a = 1;
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struct.b = 2;
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struct.c = 4;
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struct.d = 8;
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struct.e = 16;
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struct.f = 32;
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struct.g = 64;
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struct.h = 128;
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struct.i = 256;
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struct.j = 512;
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struct.k = 1024;
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struct.smallLastField = 1;
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}
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vls1.parent = vlsArray.elementAt(1);
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vls1.numChildren = 2;
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vls1.children = vlsArray.elementAt(0);
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vls2.parent = vlsArray.elementAt(1);
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vls2.parent = nullptr;
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vls2.numChildren = 0;
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vls2.children = nullptr;
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int result = f(vlsArray.elementAt(0));
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Expect.equals(2051, result);
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result = f(vlsArray.elementAt(1));
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Expect.equals(2048, result);
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calloc.free(vlsArray);
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}
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