69 lines
2.3 KiB
C++
69 lines
2.3 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 "atom/browser/javascript_environment.h"
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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.h"
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#include "base/task_scheduler/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 "atom/common/node_includes.h"
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#include "vendor/node/src/tracing/trace_event.h"
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namespace atom {
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JavascriptEnvironment::JavascriptEnvironment()
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: initialized_(Initialize()),
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isolate_holder_(base::ThreadTaskRunnerHandle::Get()),
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isolate_(isolate_holder_.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_, v8::Context::New(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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void JavascriptEnvironment::OnMessageLoopCreated() {
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isolate_holder_.AddRunMicrotasksObserver();
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}
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void JavascriptEnvironment::OnMessageLoopDestroying() {
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isolate_holder_.RemoveRunMicrotasksObserver();
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}
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bool JavascriptEnvironment::Initialize() {
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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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platform_ = node::CreatePlatform(
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base::RecommendedMaxNumberOfThreadsInPool(3, 8, 0.1, 0), nullptr);
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v8::V8::InitializePlatform(platform_);
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node::tracing::TraceEventHelper::SetTracingController(
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new v8::TracingController());
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gin::IsolateHolder::Initialize(
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gin::IsolateHolder::kNonStrictMode, gin::IsolateHolder::kStableV8Extras,
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gin::ArrayBufferAllocator::SharedInstance(), false);
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return true;
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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 atom
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