GGSTClonesArrayService.h

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/*
 * GGSTClonesArrayService.h
 *
 *  Created on: 27 Jul 2013
 *      Author: Nicola Mori
 */

#ifndef GGSTCLONESARRAYSERVICE_H_
#define GGSTCLONESARRAYSERVICE_H_

#include "TClonesArray.h"

#include <list>

class GGSTClonesArrayService {

public:
  GGSTClonesArrayService(const char *className);

  ~GGSTClonesArrayService();

  TClonesArray *ProvideArray(int sizeHint = 0, bool clearElements = false);

  void TakeBackArray(TClonesArray *&array);

  void DeleteAll();

  void DumpMemInfo();

private:
  std::string _className;

  struct ArrayDescriptor {
    TClonesArray *array; // Pointer to the array object.
    int allocSize;       // Allocated size, determined as TClonesArray::GetEntries at RecoverArray call.

    ArrayDescriptor() : array(NULL), allocSize(0) {}
    ~ArrayDescriptor() {
      if (array)
        delete array;
    }
    bool operator<(const ArrayDescriptor &rhs) {
      if (allocSize < rhs.allocSize)
        return true;
      else
        return false;
    }
  };

  typedef std::list<ArrayDescriptor> ArrayList;
  ArrayList _availableArrays;
  ArrayList _assignedArrays;
};

#endif /* GGSTCLONESARRAYSERVICE_H_ */