Samir Jindel
225a301637
There are minor fixes for dartkb and windows. The original revision is in patchset 1. Change-Id: I9ab6e5fdb33fb4e84ea520c283fe94323616a8ce Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103129 Commit-Queue: Samir Jindel <sjindel@google.com> Auto-Submit: Samir Jindel <sjindel@google.com> Reviewed-by: Daco Harkes <dacoharkes@google.com>
74 lines
2.4 KiB
Dart
74 lines
2.4 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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import "dart:_internal" show patch;
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@patch
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Pointer<T> allocate<T extends NativeType>({int count: 1}) native "Ffi_allocate";
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@patch
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T fromAddress<T extends Pointer>(int ptr) native "Ffi_fromAddress";
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@patch
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int sizeOf<T extends NativeType>() native "Ffi_sizeOf";
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@patch
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Pointer<NativeFunction<T>> fromFunction<T extends Function>(
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@DartRepresentationOf("T") Function f) native "Ffi_fromFunction";
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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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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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U cast<U extends Pointer>() native "Ffi_cast";
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@patch
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R asFunction<R extends Function>() native "Ffi_asFunction";
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@patch
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void free() native "Ffi_free";
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}
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// This method gets called when an exception bubbles up to the native -> Dart
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// boundary from an FFI native callback. Since native code does not have any
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// concept of exceptions, the exception cannot be propagated any further.
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// Instead, print a warning with the exception and return 0/0.0 from the
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// callback.
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//
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// TODO(36856): Iron out the story behind exceptions.
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@pragma("vm:entry-point")
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void _handleExposedException(dynamic exception, dynamic stackTrace) {
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print(
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"==================== UNHANDLED EXCEPTION FROM FFI CALLBACK ====================");
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print(
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""" ** Native callbacks should not throw exceptions because they cannot be
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propagated into native code. **""");
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print("EXCEPTION: $exception");
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print(stackTrace);
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}
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