FWTTreeCache.h

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#ifndef Fireworks_Core_FWTTreeCache_h
#define Fireworks_Core_FWTTreeCache_h

#include "TTreeCache.h"

#include <set>
#include <string>

class FWTTreeCache : public TTreeCache {
  std::set<std::string> m_branch_set;
  bool m_silent_low_level = false;

  static int s_default_size;
  static bool s_logging;
  static bool s_prefetching;

protected:
  bool is_branch_in_cache(const char *name) { return (m_branch_set.find(name) != m_branch_set.end()); }

  bool start_learning() {
    if (fIsLearning)
      return true;
    fIsLearning = true;
    return false;
  }
  void stop_learning() { fIsLearning = false; }

  struct LearnGuard {
    FWTTreeCache *f_tc;
    bool f_was_learning;
    bool f_was_silent_ll;

    LearnGuard(FWTTreeCache *tc) : f_tc(tc) {
      f_was_learning = f_tc->start_learning();
      f_was_silent_ll = f_tc->m_silent_low_level;
      f_tc->m_silent_low_level = true;
    }
    ~LearnGuard() {
      if (!f_was_learning)
        f_tc->stop_learning();
      f_tc->m_silent_low_level = f_was_silent_ll;
    }
  };

public:
  FWTTreeCache();
  FWTTreeCache(TTree *tree, Int_t buffersize = 0);
  ~FWTTreeCache() override;

  static void LoggingOn();
  static void LoggingOff();
  static bool IsLogging();
  static void PrefetchingOn();
  static void PrefetchingOff();
  static bool IsPrefetching();
  static void SetDefaultCacheSize(int def_size);
  static int GetDefaultCacheSize();

  Int_t AddBranchTopLevel(const char *bname);
  Int_t DropBranchTopLevel(const char *bname);

  void BranchAccessCallIn(const TBranch *b);

  // virtuals from TTreeCache, just wrappers for info printouts
  Int_t AddBranch(TBranch *b, Bool_t subbranches = kFALSE) override;
  Int_t AddBranch(const char *branch, Bool_t subbranches = kFALSE) override;
  Int_t DropBranch(TBranch *b, Bool_t subbranches = kFALSE) override;
  Int_t DropBranch(const char *branch, Bool_t subbranches = kFALSE) override;
};

#endif