blob: ed840c4e7a322c9fb54eb62535c5f26aae627567 [file] [log] [blame]
// Copyright (c) 2011 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.
// This file provides support for basic in-memory tracing of short events. We
// keep a static circular buffer where we store the last traced events, so we
// can review the cache recent behavior should we need it.
#ifndef NET_DISK_CACHE_TRACE_H__
#define NET_DISK_CACHE_TRACE_H__
#pragma once
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "net/base/net_export.h"
namespace disk_cache {
// Create and destroy the tracing buffer.
void InitTrace(void);
void DestroyTrace(void);
// Simple class to handle the trace buffer lifetime. Any object interested in
// tracing should keep a reference to the object returned by GetTraceObject().
class TraceObject : public base::RefCounted<TraceObject> {
friend class base::RefCounted<TraceObject>;
public:
static TraceObject* GetTraceObject();
void EnableTracing(bool enable);
private:
TraceObject();
~TraceObject();
DISALLOW_COPY_AND_ASSIGN(TraceObject);
};
// Traces to the internal buffer.
NET_EXPORT_PRIVATE void Trace(const char* format, ...);
} // namespace disk_cache
#endif // NET_DISK_CACHE_TRACE_H__