// Copyright (c) 2016-2017 Benoit Chesneau
//
// 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 "erl_nif.h"

#include "rocksdb/db.h"
#include "rocksdb/env.h"


namespace erocksdb {

  class ManagedEnv {
    protected:
      static ErlNifResourceType* m_Env_RESOURCE;

    public:
      explicit ManagedEnv(rocksdb::Env * Env);

      ~ManagedEnv();

      const rocksdb::Env* env();

      static void CreateEnvType(ErlNifEnv * Env);
      static void EnvResourceCleanup(ErlNifEnv *Env, void * Arg);

      static ManagedEnv * CreateEnvResource(rocksdb::Env * env);
      static ManagedEnv * RetrieveEnvResource(ErlNifEnv * Env, const ERL_NIF_TERM & EnvTerm);

    private:
      const rocksdb::Env* env_;
  };

}