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