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rocksdb

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RocksDB for Erlang

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rocksdb c_src statistics.h
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c_src/statistics.h 

// Copyright (c) 2020 Josep-Angel Herrero Bajo

// Copyright (c) 2020-2025 Benoit Chesneau:w

//

// This file is provided to you under the Apache License,

// Version 2.0 (the "License"); you may not use this file

// except in compliance with the License.  You may obtain

// a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

//



#include <mutex>

#include <memory>



#include "erl_nif.h"



// Forward declaration

namespace rocksdb {

    class Statistics;

}



namespace erocksdb {



  class Statistics {

    protected:

      static ErlNifResourceType* m_Statistics_RESOURCE;



    public:

      std::mutex mu;



      explicit Statistics(std::shared_ptr<rocksdb::Statistics> statistics);



      ~Statistics();



      std::shared_ptr<rocksdb::Statistics> statistics();



      static void CreateStatisticsType(ErlNifEnv* Env);

      static void StatisticsResourceCleanup(ErlNifEnv* Env, void* Arg);



      static Statistics* CreateStatisticsResource(std::shared_ptr<rocksdb::Statistics> statistics);

      static Statistics* RetrieveStatisticsResource(ErlNifEnv* Env, const ERL_NIF_TERM& StatisticsTerm);



    private:

      std::shared_ptr<rocksdb::Statistics> statistics_;

  };



}