| // Copyright 2015 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_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_ |
| #define BASE_TRACE_EVENT_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_ |
| |
| #include <map> |
| #include <string> |
| |
| #include "base/base_export.h" |
| #include "base/macros.h" |
| #include "base/trace_event/trace_event_impl.h" |
| |
| namespace base { |
| namespace trace_event { |
| |
| class TraceEventMemoryOverhead; |
| |
| // Data structure that assigns a unique numeric ID to |const char*|s. |
| class BASE_EXPORT TypeNameDeduplicator : public ConvertableToTraceFormat { |
| public: |
| TypeNameDeduplicator(); |
| ~TypeNameDeduplicator() override; |
| |
| // Inserts a type name and returns its ID. |
| int Insert(const char* type_name); |
| |
| // Writes the type ID -> type name mapping to the trace log. |
| void AppendAsTraceFormat(std::string* out) const override; |
| |
| // Estimates memory overhead including |sizeof(TypeNameDeduplicator)|. |
| void EstimateTraceMemoryOverhead(TraceEventMemoryOverhead* overhead) override; |
| |
| private: |
| // Map from type name to type ID. |
| std::map<const char*, int> type_ids_; |
| |
| DISALLOW_COPY_AND_ASSIGN(TypeNameDeduplicator); |
| }; |
| |
| } // namespace trace_event |
| } // namespace base |
| |
| #endif // BASE_TRACE_EVENT_HEAP_PROFILER_TYPE_NAME_DEDUPLICATOR_H_ |