Vyacheslav Egorov
e2efffa005
This reland commit5a32d8bc7cwith a fix for thread leak (Issue #56717): when `ThreadPool` is shutting down asynchronously the last worker should detach itself to prevent leaking associated low-level data structures, because no thread will join it. A hang in service isolate shutdown (caused by an existing bug) was fixed by commit157a0dc7f9. This CL turns native ports into a thin abstraction over underlying thread pool instead of building them as full fledged MessageHandler. This allows to easily implement a variation of native ports which can handle messages concurrently with the given degree of concurrency. This type of port can be used to greatly simplify implementation of IOService - which previously had to do its own concurrency management on top of "single threaded" native ports. This capability is exposed as `Dart_NewConcurrentNativePort` API. The new implementation is in general much cleaner then the old one with one exception: `Dart_CloseNativePort` API has unfortunate design where underlying message handler is destroyed asynchronously and `Dart_CloseNativePort` returns immediately without waiting for pending tasks to complete. Implementing this on top of `ThreadPool` requires some changes to thread pool implementation. Issue https://github.com/dart-lang/sdk/issues/55844 Closes https://github.com/dart-lang/sdk/issues/56717 TEST=ci Change-Id: Ic68bfb60757685afd75c80a70cdec66cc13c149b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/385000 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Slava Egorov <vegorov@google.com>
Dart
An approachable, portable, and productive language for high-quality apps on any platform
Dart is:
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Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.
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Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
License & patents
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Using Dart
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
Building Dart
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents in our repo at docs.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.
Roadmap
Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.