1 files changed, 41 insertions, 0 deletions
diff --git a/chromium/net/disk_cache/blockfile/trace.h b/chromium/net/disk_cache/blockfile/trace.h
new file mode 100644
index 00000000000..6805e6c60c2
--- /dev/null
+++ b/chromium/net/disk_cache/blockfile/trace.h
@@ -0,0 +1,41 @@
+// 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_BLOCKFILE_TRACE_H_
+#define NET_DISK_CACHE_BLOCKFILE_TRACE_H_
+
+#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_BLOCKFILE_TRACE_H_