text: /*
   * Copyright 2017 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef EventTracingPriv_DEFINED
  #define EventTracingPriv_DEFINED
  
  #include "include/private/SkMutex.h"
  
  /**
   * Construct and install an SkEventTracer, based on the mode,
   * defaulting to the --trace command line argument.
   */
  void initializeEventTracingForTools(const char* mode = nullptr);
  
  /**
   * Helper class used by internal implementations of SkEventTracer to manage categories.
   */
  class SkEventTracingCategories {
  public:
      SkEventTracingCategories() : fNumCategories(0) {}
  
      uint8_t*    getCategoryGroupEnabled(const char* name);
      const char* getCategoryGroupName(const uint8_t* categoryEnabledFlag);
  
  private:
      enum { kMaxCategories = 256 };
  
      struct CategoryState {
          uint8_t     fEnabled;
          const char* fName;
      };
  
      CategoryState fCategories[kMaxCategories];
      int           fNumCategories;
      SkMutex       fMutex;
  };
  
  #endif
  