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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
#define REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
#include <memory>
#include "base/functional/callback_forward.h"
#include "base/memory/scoped_refptr.h"
#include "build/build_config.h"
#include "components/policy/core/common/management/platform_management_service.h"
namespace base {
class SingleThreadTaskRunner;
} // namespace base
namespace net {
class ClientCertStore;
class URLRequestContextGetter;
} // namespace net
namespace network {
class SharedURLLoaderFactory;
} // namespace network
namespace remoting {
class AutoThreadTaskRunner;
// A class that manages threads and running context for the chromoting host
// process. This class is virtual to allow for platform specialization and
// testing purposes.
class ChromotingHostContext {
public:
using CreateClientCertStoreCallback =
base::RepeatingCallback<std::unique_ptr<net::ClientCertStore>()>;
#if BUILDFLAG(IS_CHROMEOS)
// Attaches task runners to the relevant browser threads for the chromoting
// host. Must be called on the UI thread of the browser process.
static std::unique_ptr<ChromotingHostContext> CreateForChromeOS(
scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
scoped_refptr<network::SharedURLLoaderFactory> shared_url_loader_factory,
CreateClientCertStoreCallback create_client_cert_store);
#else
// Create threads and URLRequestContextGetter for use by a host.
// During shutdown the caller should tear-down the ChromotingHostContext and
// then continue to run until |ui_task_runner| is no longer referenced.
// nullptr is returned if any threads fail to start.
static std::unique_ptr<ChromotingHostContext> Create(
scoped_refptr<AutoThreadTaskRunner> ui_task_runner);
#endif // BUILDFLAG(IS_CHROMEOS)
static std::unique_ptr<ChromotingHostContext> CreateForTesting(
scoped_refptr<AutoThreadTaskRunner> ui_task_runner,
scoped_refptr<network::SharedURLLoaderFactory> shared_url_loader_factory);
ChromotingHostContext(const ChromotingHostContext&) = delete;
ChromotingHostContext& operator=(const ChromotingHostContext&) = delete;
virtual ~ChromotingHostContext();
// Per-platform classes must implement these methods.
virtual std::unique_ptr<ChromotingHostContext> Copy() = 0;
virtual std::unique_ptr<net::ClientCertStore> CreateClientCertStore()
const = 0;
virtual scoped_refptr<net::URLRequestContextGetter>
url_request_context_getter() const = 0;
virtual scoped_refptr<network::SharedURLLoaderFactory>
url_loader_factory() = 0;
// Returns a callback that can be called to create a ClientCertStore.
virtual CreateClientCertStoreCallback create_client_cert_store_callback()
const = 0;
// Task runner for the thread that is used for the UI.
scoped_refptr<AutoThreadTaskRunner> ui_task_runner() const;
// Task runner for the thread used for audio capture and encoding.
scoped_refptr<AutoThreadTaskRunner> audio_task_runner() const;
// Task runner for the thread that is used for blocking file
// IO. This thread is used by the URLRequestContext to read proxy
// configuration and by NatConfig to read policy configs.
scoped_refptr<AutoThreadTaskRunner> file_task_runner() const;
// Task runner for the thread that is used by the InputInjector.
//
// TODO(sergeyu): Do we need a separate thread for InputInjector?
// Can we use some other thread instead?
scoped_refptr<AutoThreadTaskRunner> input_task_runner() const;
// Task runner for the thread used for network IO. This thread runs
// a libjingle message loop, and is the only thread on which
// libjingle code may be run.
scoped_refptr<AutoThreadTaskRunner> network_task_runner() const;
// Task runner for the thread used by the ScreenRecorder to capture
// the screen.
scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner() const;
// Task runner for the thread used to encode video streams.
scoped_refptr<AutoThreadTaskRunner> video_encode_task_runner() const;
policy::ManagementService* management_service();
protected:
ChromotingHostContext(
scoped_refptr<AutoThreadTaskRunner> ui_task_runner,
scoped_refptr<AutoThreadTaskRunner> audio_task_runner,
scoped_refptr<AutoThreadTaskRunner> file_task_runner,
scoped_refptr<AutoThreadTaskRunner> input_task_runner,
scoped_refptr<AutoThreadTaskRunner> network_task_runner,
scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner,
scoped_refptr<AutoThreadTaskRunner> video_encode_task_runner);
private:
// Caller-supplied UI thread. This is usually the application main thread.
scoped_refptr<AutoThreadTaskRunner> ui_task_runner_;
// Thread for audio capture and encoding.
scoped_refptr<AutoThreadTaskRunner> audio_task_runner_;
// Thread for I/O operations.
scoped_refptr<AutoThreadTaskRunner> file_task_runner_;
// Thread for input injection.
scoped_refptr<AutoThreadTaskRunner> input_task_runner_;
// Thread for network operations.
scoped_refptr<AutoThreadTaskRunner> network_task_runner_;
// Thread for screen capture.
scoped_refptr<AutoThreadTaskRunner> video_capture_task_runner_;
// Thread for video encoding.
scoped_refptr<AutoThreadTaskRunner> video_encode_task_runner_;
};
} // namespace remoting
#endif // REMOTING_HOST_CHROMOTING_HOST_CONTEXT_H_
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