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https://github.com/dart-lang/sdk
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0a3d896274
Adds the `ref` setter to the `StructPointer` and `UnionPointer` extensions, copying a compound structure into native memory. The FFI use-site transformation transforms invocations of this setter into an appropriate memcopy call. Closes https://github.com/dart-lang/sdk/issues/44768 TEST=tests/ffi(_2)/extension_methods_test.dart Change-Id: I3ef06ad08b8e71e39b05d662e8082fc5d0ad876d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/227542 Reviewed-by: Daco Harkes <dacoharkes@google.com> Commit-Queue: Daco Harkes <dacoharkes@google.com>
107 lines
2.2 KiB
Dart
107 lines
2.2 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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// @dart = 2.9
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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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main(List<String> arguments) {
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for (int i = 0; i < 100; i++) {
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testStoreLoad();
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testReifiedGeneric();
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testCompoundLoadAndStore();
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}
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}
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testStoreLoad() {
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final p = calloc<Int8>(2);
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p.value = 10;
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Expect.equals(10, p.value);
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p[1] = 20;
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Expect.equals(20, p[1]);
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if (sizeOf<IntPtr>() == 4) {
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// Test round tripping.
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Expect.equals(20, p.elementAt(0x100000001).value);
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Expect.equals(20, p[0x100000001]);
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}
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// Test negative index.
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final pUseNegative = p.elementAt(1);
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Expect.equals(10, pUseNegative[-1]);
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final p1 = calloc<Double>(2);
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p1.value = 10.0;
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Expect.approxEquals(10.0, p1.value);
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p1[1] = 20.0;
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Expect.approxEquals(20.0, p1[1]);
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calloc.free(p1);
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final p2 = calloc<Pointer<Int8>>(2);
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p2.value = p;
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Expect.equals(p, p2.value);
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p2[1] = p;
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Expect.equals(p, p2[1]);
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calloc.free(p2);
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calloc.free(p);
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final p3 = calloc<Foo>();
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Foo foo = p3.ref;
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foo.a = 1;
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Expect.equals(1, foo.a);
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calloc.free(p3);
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final p4 = calloc<Foo>(2);
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Foo src = p4[1];
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src.a = 2;
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p4.ref = src;
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Foo dst = p4.ref;
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Expect.equals(2, dst.a);
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calloc.free(p4);
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}
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testReifiedGeneric() {
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final p = calloc<Pointer<Int8>>();
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Pointer<Pointer<NativeType>> p2 = p;
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Expect.isTrue(p2.value is Pointer<Int8>);
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calloc.free(p);
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}
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testCompoundLoadAndStore() {
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final foos = calloc<Foo>(10);
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final reference = foos.ref..a = 10;
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for (var i = 1; i < 9; i++) {
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foos[i] = reference;
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Expect.isTrue(foos[i].a == 10);
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foos.elementAt(i).ref = reference;
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Expect.isTrue(foos.elementAt(i).ref.a == 10);
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}
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final bars = calloc<Bar>(10);
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bars[0].foo = reference;
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for (var i = 1; i < 9; i++) {
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bars[i] = bars[0];
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Expect.isTrue(bars.elementAt(i).ref.foo.a == 10);
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}
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calloc.free(foos);
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calloc.free(bars);
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}
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class Foo extends Struct {
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@Int8()
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int a;
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}
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class Bar extends Union {
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Foo foo;
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@Int32()
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int baz;
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}
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