mirror of
https://github.com/encounter/engine.git
synced 2026-03-30 11:09:55 -07:00
Ryan Macnak
f6900001eb
Remove dead shared snapshot arguments to Dart_CreateIsolateGroup. 6a65ea9cad4b [vm] Remove shared snapshot and reused instructions features. db8370e36147 [gardening] Fix frontend-server dartdevc windows test. 4601bd7bffea Modified supertype check error message to be more descriptive. 0449905e2de6 [CFE] Add a serialization-and-unserialization step to strong test c8b903c2f94f Update CHANGELOG.md 2a12a13d9684 [Test] Skips emit_aot_size_info_flag_test on crossword. b26127fe01a5 [cfe] Add reachability test skeleton
82 lines
2.4 KiB
C++
82 lines
2.4 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_VM_LIFECYCLE_H_
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#define FLUTTER_RUNTIME_DART_VM_LIFECYCLE_H_
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#include <memory>
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#include "flutter/fml/macros.h"
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#include "flutter/lib/ui/isolate_name_server/isolate_name_server.h"
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#include "flutter/runtime/dart_vm.h"
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#include "flutter/runtime/service_protocol.h"
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namespace flutter {
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// A strong reference to the Dart VM. There can only be one VM running in the
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// process at any given time. A reference to the VM may only be obtained via the
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// |Create| method. In case there is already a running instance of the VM in the
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// process, a strong reference to that VM is obtained and the arguments to the
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// |Create| call ignored. If there is no VM already running in the process, a VM
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// is initialized in a thread safe manner and returned to the caller. The VM
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// will shutdown only when all callers relinquish their references (by
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// collecting their instances of this class).
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//
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// DartVMRef instances may be created on any thread.
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class DartVMRef {
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public:
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FML_WARN_UNUSED_RESULT
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static DartVMRef Create(Settings settings,
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fml::RefPtr<DartSnapshot> vm_snapshot = nullptr,
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fml::RefPtr<DartSnapshot> isolate_snapshot = nullptr);
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DartVMRef(DartVMRef&&);
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~DartVMRef();
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// This is an inherently racy way to check if a VM instance is running and
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// should not be used outside of unit-tests where there is a known threading
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// model.
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static bool IsInstanceRunning();
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static std::shared_ptr<const DartVMData> GetVMData();
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static std::shared_ptr<ServiceProtocol> GetServiceProtocol();
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static std::shared_ptr<IsolateNameServer> GetIsolateNameServer();
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operator bool() const { return static_cast<bool>(vm_); }
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DartVM* get() {
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FML_DCHECK(vm_);
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return vm_.get();
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}
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DartVM* operator->() {
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FML_DCHECK(vm_);
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return vm_.get();
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}
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DartVM* operator&() {
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FML_DCHECK(vm_);
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return vm_.get();
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}
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private:
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friend class DartIsolate;
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std::shared_ptr<DartVM> vm_;
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DartVMRef(std::shared_ptr<DartVM> vm);
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// Only used by Dart Isolate to register itself with the VM.
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static DartVM* GetRunningVM();
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FML_DISALLOW_COPY_AND_ASSIGN(DartVMRef);
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};
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} // namespace flutter
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#endif // FLUTTER_RUNTIME_DART_VM_LIFECYCLE_H_
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