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// Copyright 2016 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 BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_
#define BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_
#include <memory>
#include <string>
#include <unordered_set>
#include "base/base_export.h"
#include "base/macros.h"
#include "base/trace_event/trace_event_filter.h"
namespace base {
namespace trace_event {
class TraceEvent;
// Filters trace events by checking the full name against a whitelist.
// The current implementation is quite simple and dumb and just uses a
// hashtable which requires char* to std::string conversion. It could be smarter
// and use a bloom filter trie. However, today this is used too rarely to
// justify that cost.
class BASE_EXPORT EventNameFilter : public TraceEventFilter {
public:
using EventNamesWhitelist = std::unordered_set<std::string>;
static const char kName[];
EventNameFilter(std::unique_ptr<EventNamesWhitelist>);
~EventNameFilter() override;
// TraceEventFilter implementation.
bool FilterTraceEvent(const TraceEvent&) const override;
private:
std::unique_ptr<const EventNamesWhitelist> event_names_whitelist_;
DISALLOW_COPY_AND_ASSIGN(EventNameFilter);
};
} // namespace trace_event
} // namespace base
#endif // BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_
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