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71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
// Copyright (c) 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_BASE_NETWORK_ACTIVITY_MONITOR_H_
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#define NET_BASE_NETWORK_ACTIVITY_MONITOR_H_
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#include <stdint.h>
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#include "base/lazy_instance.h"
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#include "base/macros.h"
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#include "base/synchronization/lock.h"
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#include "base/time/time.h"
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#include "net/base/net_export.h"
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namespace net {
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namespace test {
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class NetworkActivityMonitorPeer;
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} // namespace test
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// NetworkActivityMonitor tracks network activity across all sockets and
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// provides cumulative statistics about bytes sent to and received from
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// the network. It uses a lock to ensure thread-safety.
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//
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// There are a few caveats:
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// * Bytes "sent" includes all send attempts and may include
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// some bytes which were actually never sent over the network.
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// * Bytes received includes only bytes actually received from the network,
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// and does not include any bytes read from the the cache.
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// * Network activity not initiated directly using chromium sockets won't
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// be reflected here (for instance DNS queries issued by getaddrinfo()).
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class NET_EXPORT_PRIVATE NetworkActivityMonitor {
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public:
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// Returns the singleton instance of the monitor.
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static NetworkActivityMonitor* GetInstance();
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void IncrementBytesReceived(uint64_t bytes_received);
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void IncrementBytesSent(uint64_t bytes_sent);
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uint64_t GetBytesReceived() const;
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uint64_t GetBytesSent() const;
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base::TimeDelta GetTimeSinceLastReceived() const;
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base::TimeDelta GetTimeSinceLastSent() const;
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private:
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friend class test::NetworkActivityMonitorPeer;
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NetworkActivityMonitor();
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~NetworkActivityMonitor();
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friend struct base::LazyInstanceTraitsBase<NetworkActivityMonitor>;
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// Protects all the following members.
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mutable base::Lock lock_;
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uint64_t bytes_received_;
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uint64_t bytes_sent_;
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base::TimeTicks last_received_ticks_;
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base::TimeTicks last_sent_ticks_;
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DISALLOW_COPY_AND_ASSIGN(NetworkActivityMonitor);
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};
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} // namespace net
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#endif // NET_BASE_NETWORK_ACTIVITY_MONITOR_H_
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