Simon Binder
150e61a662
Allow annotating top-level or static fields with `@Native` to create fields backed by native memory. By using the `_addressOf` operator implemented in the VM, these fields can be implemented in the CFE by replacing them with accessors looking up the pointer and then using existing methods to load and store the value. Closes https://github.com/dart-lang/sdk/issues/50551 TEST=tests/ffi/native_assets/asset_*_test.dart TEST=pkg/analyzer/test/src/diagnostics/ffi_native_test.dart CoreLibraryReviewExempt: VM & dart2wasm only feature Change-Id: I61dccc88076723d6a6ba02d7fd848b18e4caf780 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/338020 Reviewed-by: Daco Harkes <dacoharkes@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com> Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
46 lines
798 B
Dart
46 lines
798 B
Dart
import 'dart:ffi';
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@Native()
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external Pointer<Char> aString;
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@Native<Int32>()
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external int anInt;
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@Native<Int>()
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external int anotherInt;
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final class Vec2d extends Struct {
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@Double()
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external double x;
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@Double()
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external double y;
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}
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final class MyUnion extends Union {
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external Vec2d vector;
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external Pointer<Vec2d> indirectVector;
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}
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@Native()
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external final Vec2d vector;
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@Native()
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external MyUnion union;
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void main() {
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print('first char of string: ${aString.value}');
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print('global int: {$anInt}');
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aString = nullptr;
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anInt++;
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final vec = vector;
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print('(${vec.x}, ${vec.y})');
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union.indirectVector = Native.addressOf(vector);
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print(Native.addressOf<Int>(anotherInt));
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print(Native.addressOf<Vec2d>(vector));
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print(Native.addressOf<MyUnion>(union));
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}
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