111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
|
|
// Use of this source code is governed by the MIT license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "shell/browser/javascript_environment.h"
|
|
|
|
#include <memory>
|
|
|
|
#include <string>
|
|
|
|
#include "base/command_line.h"
|
|
#include "base/message_loop/message_loop_current.h"
|
|
#include "base/task/thread_pool/initialization_util.h"
|
|
#include "base/threading/thread_task_runner_handle.h"
|
|
#include "content/public/common/content_switches.h"
|
|
#include "gin/array_buffer.h"
|
|
#include "gin/v8_initializer.h"
|
|
#include "shell/browser/microtasks_runner.h"
|
|
#include "shell/common/gin_helper/cleaned_up_at_exit.h"
|
|
#include "shell/common/node_includes.h"
|
|
#include "tracing/trace_event.h"
|
|
|
|
namespace {
|
|
v8::Isolate* g_isolate;
|
|
}
|
|
|
|
namespace electron {
|
|
|
|
JavascriptEnvironment::JavascriptEnvironment(uv_loop_t* event_loop)
|
|
: isolate_(Initialize(event_loop)),
|
|
isolate_holder_(base::ThreadTaskRunnerHandle::Get(),
|
|
gin::IsolateHolder::kSingleThread,
|
|
gin::IsolateHolder::kAllowAtomicsWait,
|
|
gin::IsolateHolder::IsolateType::kUtility,
|
|
gin::IsolateHolder::IsolateCreationMode::kNormal,
|
|
isolate_),
|
|
locker_(isolate_) {
|
|
isolate_->Enter();
|
|
v8::HandleScope scope(isolate_);
|
|
auto context = node::NewContext(isolate_);
|
|
context_ = v8::Global<v8::Context>(isolate_, context);
|
|
context->Enter();
|
|
}
|
|
|
|
JavascriptEnvironment::~JavascriptEnvironment() {
|
|
{
|
|
v8::Locker locker(isolate_);
|
|
v8::HandleScope scope(isolate_);
|
|
gin_helper::CleanedUpAtExit::DoCleanup();
|
|
context_.Get(isolate_)->Exit();
|
|
}
|
|
isolate_->Exit();
|
|
g_isolate = nullptr;
|
|
}
|
|
|
|
v8::Isolate* JavascriptEnvironment::Initialize(uv_loop_t* event_loop) {
|
|
auto* cmd = base::CommandLine::ForCurrentProcess();
|
|
|
|
// --js-flags.
|
|
std::string js_flags = cmd->GetSwitchValueASCII(switches::kJavaScriptFlags);
|
|
if (!js_flags.empty())
|
|
v8::V8::SetFlagsFromString(js_flags.c_str(), js_flags.size());
|
|
|
|
// The V8Platform of gin relies on Chromium's task schedule, which has not
|
|
// been started at this point, so we have to rely on Node's V8Platform.
|
|
auto* tracing_agent = node::CreateAgent();
|
|
auto* tracing_controller = tracing_agent->GetTracingController();
|
|
node::tracing::TraceEventHelper::SetAgent(tracing_agent);
|
|
platform_ = node::CreatePlatform(
|
|
base::RecommendedMaxNumberOfThreadsInThreadGroup(3, 8, 0.1, 0),
|
|
tracing_controller);
|
|
|
|
v8::V8::InitializePlatform(platform_);
|
|
gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode,
|
|
gin::ArrayBufferAllocator::SharedInstance(),
|
|
nullptr /* external_reference_table */,
|
|
false /* create_v8_platform */);
|
|
|
|
v8::Isolate* isolate = v8::Isolate::Allocate();
|
|
platform_->RegisterIsolate(isolate, event_loop);
|
|
g_isolate = isolate;
|
|
|
|
return isolate;
|
|
}
|
|
|
|
// static
|
|
v8::Isolate* JavascriptEnvironment::GetIsolate() {
|
|
CHECK(g_isolate);
|
|
return g_isolate;
|
|
}
|
|
|
|
void JavascriptEnvironment::OnMessageLoopCreated() {
|
|
DCHECK(!microtasks_runner_);
|
|
microtasks_runner_ = std::make_unique<MicrotasksRunner>(isolate());
|
|
base::MessageLoopCurrent::Get()->AddTaskObserver(microtasks_runner_.get());
|
|
}
|
|
|
|
void JavascriptEnvironment::OnMessageLoopDestroying() {
|
|
DCHECK(microtasks_runner_);
|
|
base::MessageLoopCurrent::Get()->RemoveTaskObserver(microtasks_runner_.get());
|
|
platform_->DrainTasks(isolate_);
|
|
platform_->UnregisterIsolate(isolate_);
|
|
}
|
|
|
|
NodeEnvironment::NodeEnvironment(node::Environment* env) : env_(env) {}
|
|
|
|
NodeEnvironment::~NodeEnvironment() {
|
|
node::FreeEnvironment(env_);
|
|
}
|
|
|
|
} // namespace electron
|