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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
#define CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
#include <memory>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "build/build_config.h"
#include "content/child/child_thread_impl.h"
#include "content/public/utility/utility_thread.h"
#include "mojo/public/cpp/bindings/generic_pending_receiver.h"
#include "third_party/blink/public/platform/platform.h"
namespace mojo {
class ServiceFactory;
}
namespace content {
class UtilityServiceFactory;
// This class represents the background thread where the utility task runs.
class UtilityThreadImpl : public UtilityThread,
public ChildThreadImpl {
public:
explicit UtilityThreadImpl(base::RepeatingClosure quit_closure);
// Constructor used when running in single process mode.
explicit UtilityThreadImpl(const InProcessChildThreadParams& params);
~UtilityThreadImpl() override;
void Shutdown() override;
// UtilityThread:
void ReleaseProcess() override;
void EnsureBlinkInitialized() override;
#if defined(OS_POSIX) && !defined(OS_ANDROID)
void EnsureBlinkInitializedWithSandboxSupport() override;
#endif
// Handles an incoming service interface receiver from a browser-side
// ServiceProcessHost. This is called only if `receiver` didn't first match
// any registered IO-thread service handlers in this process. If successful,
// `termination_callback` will eventually be invoked when the new service
// instance terminates.
//
// If there is no matching service, `receiver` is discarded and
// `termination_callback` is invoked immediately.
void HandleServiceRequest(mojo::GenericPendingReceiver receiver,
base::OnceClosure termination_callback);
private:
void EnsureBlinkInitializedInternal(bool sandbox_support);
void Init();
// ChildThreadImpl:
bool OnControlMessageReceived(const IPC::Message& msg) override;
void RunService(
const std::string& service_name,
mojo::PendingReceiver<service_manager::mojom::Service> receiver) override;
// blink::Platform implementation if needed.
std::unique_ptr<blink::Platform> blink_platform_impl_;
// Helper to handle incoming RunService calls. Note that this is deprecated
// and only remains in support of some embedders which haven't migrated away
// from Service Manager-based services yet.
std::unique_ptr<UtilityServiceFactory> service_factory_;
// The ServiceFactory used to handle incoming service requests from a
// browser-side ServiceProcessHost. Any service registered here will run on
// the main thread of its service process.
std::unique_ptr<mojo::ServiceFactory> main_thread_services_;
DISALLOW_COPY_AND_ASSIGN(UtilityThreadImpl);
};
} // namespace content
#endif // CONTENT_UTILITY_UTILITY_THREAD_IMPL_H_
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