ObjectCache.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
#ifndef O2_FRAMEWORK_OBJECTCACHE_H_
#define O2_FRAMEWORK_OBJECTCACHE_H_
 
#include "Framework/DataRef.h"
#include <unordered_map>
#include <map>
#include <string>
 
namespace o2::framework
{
 
struct ObjectCache {
  struct Id {
    int64_t value;
    static Id fromRef(DataRef& ref)
    {
      return {reinterpret_cast<int64_t>(ref.payload)};
    }
    bool operator==(const Id& other) const
    {
      return value == other.value;
    }
 
    struct hash_fn {
      std::size_t operator()(const Id& id) const
      {
        return id.value;
      }
    };
  };
 
  struct Entry {
    Id id{0};
    void* obj{nullptr};
  };
 
  struct MetadataEntry {
    Id id{0};
    std::map<std::string, std::string> metadata;
  };
 
  std::unordered_map<std::string, Entry> matcherToEntry;
 
  std::unordered_map<std::string, MetadataEntry> matcherToMetadata;
};
 
} // namespace o2::framework
 
#endif // O2_FRAMEWORK_OBJECTCACHE_H_