2b316f3843
* refactor: clang-tidy modernize-use-nullptr * refactor: clang-tidy modernize-use-equals-default * refactor: clang-tidy modernize-make-unique * refactor: omit nullptr arg from unique_ptr.reset() As per comment by @miniak
88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "shell/browser/javascript_environment.h"
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#include <memory>
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#include <string>
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#include "base/command_line.h"
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#include "base/message_loop/message_loop_current.h"
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#include "base/task/thread_pool/initialization_util.h"
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#include "base/threading/thread_task_runner_handle.h"
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#include "content/public/common/content_switches.h"
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#include "gin/array_buffer.h"
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#include "gin/v8_initializer.h"
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#include "shell/browser/microtasks_runner.h"
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#include "shell/common/node_includes.h"
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#include "tracing/trace_event.h"
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namespace electron {
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JavascriptEnvironment::JavascriptEnvironment(uv_loop_t* event_loop)
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: isolate_(Initialize(event_loop)),
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isolate_holder_(base::ThreadTaskRunnerHandle::Get(),
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gin::IsolateHolder::kSingleThread,
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gin::IsolateHolder::kAllowAtomicsWait,
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gin::IsolateHolder::IsolateType::kUtility,
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gin::IsolateHolder::IsolateCreationMode::kNormal,
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isolate_),
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isolate_scope_(isolate_),
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locker_(isolate_),
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handle_scope_(isolate_),
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context_(isolate_, node::NewContext(isolate_)),
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context_scope_(v8::Local<v8::Context>::New(isolate_, context_)) {}
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JavascriptEnvironment::~JavascriptEnvironment() = default;
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v8::Isolate* JavascriptEnvironment::Initialize(uv_loop_t* event_loop) {
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auto* cmd = base::CommandLine::ForCurrentProcess();
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// --js-flags.
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std::string js_flags = cmd->GetSwitchValueASCII(switches::kJavaScriptFlags);
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if (!js_flags.empty())
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v8::V8::SetFlagsFromString(js_flags.c_str(), js_flags.size());
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// The V8Platform of gin relies on Chromium's task schedule, which has not
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// been started at this point, so we have to rely on Node's V8Platform.
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auto* tracing_agent = node::CreateAgent();
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auto* tracing_controller = tracing_agent->GetTracingController();
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node::tracing::TraceEventHelper::SetAgent(tracing_agent);
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platform_ = node::CreatePlatform(
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base::RecommendedMaxNumberOfThreadsInThreadGroup(3, 8, 0.1, 0),
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tracing_controller);
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v8::V8::InitializePlatform(platform_);
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gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
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gin::ArrayBufferAllocator::SharedInstance(),
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nullptr /* external_reference_table */,
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false /* create_v8_platform */);
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v8::Isolate* isolate = v8::Isolate::Allocate();
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platform_->RegisterIsolate(isolate, event_loop);
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return isolate;
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}
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void JavascriptEnvironment::OnMessageLoopCreated() {
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DCHECK(!microtasks_runner_);
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microtasks_runner_ = std::make_unique<MicrotasksRunner>(isolate());
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base::MessageLoopCurrent::Get()->AddTaskObserver(microtasks_runner_.get());
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}
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void JavascriptEnvironment::OnMessageLoopDestroying() {
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DCHECK(microtasks_runner_);
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base::MessageLoopCurrent::Get()->RemoveTaskObserver(microtasks_runner_.get());
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platform_->DrainTasks(isolate_);
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platform_->UnregisterIsolate(isolate_);
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}
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NodeEnvironment::NodeEnvironment(node::Environment* env) : env_(env) {}
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NodeEnvironment::~NodeEnvironment() {
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node::FreeEnvironment(env_);
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}
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} // namespace electron
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