ObjBase.h

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#ifndef PODIO_OBJBASE_H
#define PODIO_OBJBASE_H
 
#include "podio/ObjectID.h"
#include <atomic>
#include <iostream>
 
namespace podio {
 
class ObjBase {
public:
  /// Constructor from ObjectID and initial object-count
  ObjBase(ObjectID id_, unsigned i) : id(id_), ref_counter(i) {
  }
 
  /// checks whether object is "untracked" by a collection
  /// if yes, increases reference count
  void acquire() {
    if (id.index == podio::ObjectID::untracked) {
      ++ref_counter;
    }
  };
 
  /// checks whether object is "untracked" by a collection
  /// if yes, decrease reference count and delete itself if count===0
  int release() {
    if (id.index != podio::ObjectID::untracked) {
      return 1;
    };
    if (--ref_counter == 0) {
      delete this;
    }
    return 0;
  };
 
  /// destructor
  virtual ~ObjBase() = default;
 
public:
  /// ID of the object
  podio::ObjectID id;
 
private:
  /// reference counter
  std::atomic<unsigned> ref_counter;
};
 
} // namespace podio
 
#endif