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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 NET_LOG_TRACE_NET_LOG_OBSERVER_H_
- #define NET_LOG_TRACE_NET_LOG_OBSERVER_H_
- #include "base/memory/raw_ptr.h"
- #include "base/memory/weak_ptr.h"
- #include "base/trace_event/trace_log.h"
- #include "net/base/net_export.h"
- #include "net/log/net_log.h"
- namespace net {
- // TraceNetLogObserver watches for TraceLog enable, and sends NetLog
- // events to TraceLog if it is enabled.
- class NET_EXPORT TraceNetLogObserver
- : public NetLog::ThreadSafeObserver,
- public base::trace_event::TraceLog::AsyncEnabledStateObserver {
- public:
- TraceNetLogObserver();
- TraceNetLogObserver(const TraceNetLogObserver&) = delete;
- TraceNetLogObserver& operator=(const TraceNetLogObserver&) = delete;
- ~TraceNetLogObserver() override;
- // net::NetLog::ThreadSafeObserver implementation:
- void OnAddEntry(const NetLogEntry& entry) override;
- // Start to watch for TraceLog enable and disable events.
- // This can't be called if already watching for events.
- // Watches NetLog only when tracing is enabled.
- void WatchForTraceStart(NetLog* net_log);
- // Stop watching for TraceLog enable and disable events.
- // If WatchForTraceStart is called, this must be called before
- // TraceNetLogObserver is destroyed.
- void StopWatchForTraceStart();
- // base::trace_event::TraceLog::EnabledStateChangedObserver implementation:
- void OnTraceLogEnabled() override;
- void OnTraceLogDisabled() override;
- private:
- raw_ptr<NetLog> net_log_to_watch_ = nullptr;
- base::WeakPtrFactory<TraceNetLogObserver> weak_factory_{this};
- };
- } // namespace net
- #endif // NET_LOG_TRACE_NET_LOG_OBSERVER_H_
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