Alexander Aprelev
0c481a196c
Fixes https://github.com/flutter/flutter/issues/40114 Change-Id: If8d71e9c19c2e794d29f7ecbacb87457890a2fd5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/116883 Reviewed-by: Alexander Markov <alexmarkov@google.com> Commit-Queue: Alexander Aprelev <aam@google.com>
87 lines
2.9 KiB
Dart
87 lines
2.9 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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// All imports must be in all FFI patch files to not depend on the order
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// the patches are applied.
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import "dart:_internal" show patch;
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import 'dart:typed_data' show TypedData;
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@patch
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int sizeOf<T extends NativeType>() native "Ffi_sizeOf";
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Pointer<T> _allocate<T extends NativeType>(int count) native "Ffi_allocate";
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Pointer<T> _fromAddress<T extends NativeType>(int ptr) native "Ffi_fromAddress";
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// The real implementation of this function (for interface calls) lives in
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// BuildFfiAsFunctionCall in the Kernel frontend. No calls can actually reach
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// this function.
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DS _asFunctionInternal<DS extends Function, NS extends Function>(
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Pointer<NativeFunction<NS>> ptr) native "Ffi_asFunctionInternal";
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dynamic _asExternalTypedData(Pointer ptr, int count)
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native "Ffi_asExternalTypedData";
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@patch
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@pragma("vm:entry-point")
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class Pointer<T extends NativeType> {
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@patch
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factory Pointer.allocate({int count: 1}) => _allocate<T>(count);
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@patch
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factory Pointer.fromAddress(int ptr) => _fromAddress(ptr);
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@patch
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static Pointer<NativeFunction<T>> fromFunction<T extends Function>(
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@DartRepresentationOf("T") Function f,
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Object exceptionalReturn) native "Ffi_fromFunction";
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// TODO(sjindel): When NNBD is available, we should change `value` to be
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// non-null.
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@patch
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void store(Object value) native "Ffi_store";
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@patch
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R load<R>() native "Ffi_load";
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@patch
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int get address native "Ffi_address";
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// Note this could also be implmented without an extra native as offsetBy
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// (elementSize()*index). This would be 2 native calls rather than one. What
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// would be better?
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@patch
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Pointer<T> elementAt(int index) native "Ffi_elementAt";
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// Note this could also be implmented without an extra native as
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// fromAddress(address). This would be 2 native calls rather than one.
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// What would be better?
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@patch
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Pointer<T> offsetBy(int offsetInBytes) native "Ffi_offsetBy";
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// Note this could also be implemented without an extra native as
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// fromAddress(address). This would be 2 native calls rather than one.
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// What would be better?
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@patch
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Pointer<U> cast<U extends NativeType>() native "Ffi_cast";
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@patch
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R asFunction<R extends Function>() {
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throw UnsupportedError("Pointer.asFunction cannot be called dynamically.");
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}
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@patch
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void free() native "Ffi_free";
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@patch
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TypedData asExternalTypedData({int count: 1}) =>
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_asExternalTypedData(this, count);
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}
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// Returns the ABI used for size and alignment calculations.
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// See pkg/vm/lib/transformations/ffi.dart.
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@pragma('vm:prefer-inline')
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int _abi()
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native "Recognized method: method is directly interpreted by the bytecode interpreter or IR graph is built in the flow graph builder.";
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