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// Copyright 2014 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_BROWSER_DEVTOOLS_PROTOCOL_SYSTEM_INFO_HANDLER_H_
#define CONTENT_BROWSER_DEVTOOLS_PROTOCOL_SYSTEM_INFO_HANDLER_H_
#include <set>
#include "content/browser/devtools/protocol/devtools_protocol_handler.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/gpu_data_manager_observer.h"
namespace content {
namespace devtools {
namespace system_info {
class SystemInfoHandler {
public:
using Response = DevToolsProtocolClient::Response;
SystemInfoHandler();
~SystemInfoHandler();
void SetClient(scoped_ptr<Client> client);
Response GetInfo(DevToolsCommandId command_id);
private:
friend class SystemInfoHandlerGpuObserver;
void SendGetInfoResponse(DevToolsCommandId command_id);
// Bookkeeping for the active GpuObservers.
void AddActiveObserverId(int observer_id);
bool RemoveActiveObserverId(int observer_id);
void ObserverWatchdogCallback(int observer_id, DevToolsCommandId command_id);
// For robustness, we have to guarantee a response to getInfo requests.
// It's very unlikely that the requests will time out. The
// GpuDataManager's threading model is not well defined (see comments in
// gpu_data_manager_impl.h) and it is very difficult to correctly clean
// up its observers. For the moment, especially since these classes are
// only used in tests, we leak a little bit of memory if we don't get a
// callback from the GpuDataManager in time.
mutable base::Lock lock_;
std::set<int> active_observers_;
scoped_ptr<Client> client_;
base::WeakPtrFactory<SystemInfoHandler> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(SystemInfoHandler);
};
} // namespace system_info
} // namespace devtools
} // namespace content
#endif // CONTENT_BROWSER_DEVTOOLS_PROTOCOL_SYSTEM_INFO_HANDLER_H_
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