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This enables work ongoing by @derekxu16 to improve performance in flutter_tester when running multiple files from large test suites. Specifically, it: - Exposes a `Spawn` C symbol from flutter_tester that runs the current kernel in a new UI isolate with a different entrypoint and/or route name - Exposes two symbols from flutter_tester to allow a test harness to more efficiently load particular kernel files or to lookup an entrypoint from an imported source file. - Avoids re-loading the kernel file completely when spawning a new UI isolate Googlers can look at go/flutter-tester-isolates for some more context. If anyone wants I'm happy to create a public version of that doc.
95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_RUNTIME_DART_ISOLATE_GROUP_DATA_H_
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#define FLUTTER_RUNTIME_DART_ISOLATE_GROUP_DATA_H_
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#include <map>
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#include <mutex>
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#include <string>
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#include "flutter/common/settings.h"
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#include "flutter/fml/closure.h"
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#include "flutter/fml/memory/ref_ptr.h"
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#include "flutter/lib/ui/window/platform_configuration.h"
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namespace flutter {
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class DartIsolate;
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class DartSnapshot;
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class PlatformMessageHandler;
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using ChildIsolatePreparer = std::function<bool(DartIsolate*)>;
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// Object holding state associated with a Dart isolate group. An instance of
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// this class will be provided to Dart_CreateIsolateGroup as the
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// isolate_group_data.
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//
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// This object must be thread safe because the Dart VM can invoke the isolate
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// group cleanup callback on any thread.
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class DartIsolateGroupData : public PlatformMessageHandlerStorage {
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public:
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DartIsolateGroupData(const Settings& settings,
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fml::RefPtr<const DartSnapshot> isolate_snapshot,
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std::string advisory_script_uri,
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std::string advisory_script_entrypoint,
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const ChildIsolatePreparer& child_isolate_preparer,
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const fml::closure& isolate_create_callback,
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const fml::closure& isolate_shutdown_callback);
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~DartIsolateGroupData();
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const Settings& GetSettings() const;
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fml::RefPtr<const DartSnapshot> GetIsolateSnapshot() const;
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const std::string& GetAdvisoryScriptURI() const;
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const std::string& GetAdvisoryScriptEntrypoint() const;
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ChildIsolatePreparer GetChildIsolatePreparer() const;
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const fml::closure& GetIsolateCreateCallback() const;
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const fml::closure& GetIsolateShutdownCallback() const;
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void SetChildIsolatePreparer(const ChildIsolatePreparer& value);
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/// Adds a kernel buffer mapping to the kernels loaded for this isolate group.
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void AddKernelBuffer(const std::shared_ptr<const fml::Mapping>& buffer);
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/// A copy of the mappings for all kernel buffer objects loaded into this
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/// isolate group.
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std::vector<std::shared_ptr<const fml::Mapping>> GetKernelBuffers() const;
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// |PlatformMessageHandlerStorage|
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void SetPlatformMessageHandler(
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int64_t root_isolate_token,
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std::weak_ptr<PlatformMessageHandler> handler) override;
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// |PlatformMessageHandlerStorage|
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std::weak_ptr<PlatformMessageHandler> GetPlatformMessageHandler(
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int64_t root_isolate_token) const override;
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private:
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std::vector<std::shared_ptr<const fml::Mapping>> kernel_buffers_;
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const Settings settings_;
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const fml::RefPtr<const DartSnapshot> isolate_snapshot_;
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const std::string advisory_script_uri_;
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const std::string advisory_script_entrypoint_;
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mutable std::mutex child_isolate_preparer_mutex_;
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ChildIsolatePreparer child_isolate_preparer_;
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const fml::closure isolate_create_callback_;
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const fml::closure isolate_shutdown_callback_;
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std::map<int64_t, std::weak_ptr<PlatformMessageHandler>>
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platform_message_handlers_;
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mutable std::mutex platform_message_handlers_mutex_;
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FML_DISALLOW_COPY_AND_ASSIGN(DartIsolateGroupData);
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};
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} // namespace flutter
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#endif // FLUTTER_RUNTIME_DART_ISOLATE_GROUP_DATA_H_
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