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// Copyright 2014 The Chromium Authors
// 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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