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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/utility/in_process_utility_thread.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/lazy_instance.h"
#include "base/location.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_restrictions.h"
#include "content/child/child_process.h"
#include "content/utility/utility_thread_impl.h"
namespace content {
// We want to ensure there's only one utility thread running at a time, as there
// are many globals used in the utility process.
static base::LazyInstance<base::Lock>::DestructorAtExit
g_one_utility_thread_lock;
InProcessUtilityThread::InProcessUtilityThread(
const InProcessChildThreadParams& params)
: Thread("Chrome_InProcUtilityThread"), params_(params) {}
InProcessUtilityThread::~InProcessUtilityThread() {
base::ScopedAllowBaseSyncPrimitivesOutsideBlockingScope allow_thread_join;
Stop();
}
void InProcessUtilityThread::Init() {
// We need to return right away or else the main thread that started us will
// hang.
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE, base::BindOnce(&InProcessUtilityThread::InitInternal,
base::Unretained(this)));
}
void InProcessUtilityThread::CleanUp()
UNLOCK_FUNCTION(g_one_utility_thread_lock.Get()) {
child_process_.reset();
// See comment in RendererMainThread.
SetThreadWasQuitProperly(true);
g_one_utility_thread_lock.Get().Release();
}
void InProcessUtilityThread::InitInternal()
EXCLUSIVE_LOCK_FUNCTION(g_one_utility_thread_lock.Get()) {
g_one_utility_thread_lock.Get().Acquire();
child_process_ = std::make_unique<ChildProcess>();
child_process_->set_main_thread(new UtilityThreadImpl(params_));
}
base::Thread* CreateInProcessUtilityThread(
const InProcessChildThreadParams& params) {
return new InProcessUtilityThread(params);
}
} // namespace content
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