variant_deep_serialize.hpp

/* Copyright © 2017 Apple Inc. All rights reserved.
 *
 * Use of this source code is governed by a BSD-3-clause license that can
 * be found in the LICENSE.txt file or at https://opensource.org/licenses/BSD-3-Clause
 */
#ifndef TURI_VARIANT_DEEP_SERIALIZE_H_
#define TURI_VARIANT_DEEP_SERIALIZE_H_

#include <model_server/lib/variant.hpp>

namespace turi {

/**
 * Serialize the variant type, deep copying the pointer types.
 */
void variant_deep_save(const variant_type& v, oarchive& oarc);

/**
 *  Overload of above for types castable to and from variant_type
 */
template <typename T>
void variant_deep_save(const T& v, oarchive& oarc) {

  static uint64_t type_check_hash = hash64(0);

  oarc << type_check_hash;

  variant_deep_save(to_variant(v), oarc);
}

/**
 * Deserialize the variant type, allocate new resources for the pointer types.
 */
void variant_deep_load(variant_type& v, iarchive& iarc);

/**
 *  Overload of above for types castable to and from variant_type
 */
template <typename T>
void variant_deep_load(T& v, iarchive& iarc) {

  static uint64_t type_check_hash = hash64(0);

  uint64_t type_check_hash_load;
  iarc >> type_check_hash_load;

  ASSERT_MSG(type_check_hash == type_check_hash_load,
             (std::string("Deserialization of type ") + typeid(T).name()
              + " failed, likely due to corruption earlier in the stream. ").c_str());

  variant_type vv;
  variant_deep_load(vv, iarc);
  v = variant_get_value<T>(vv);
}

} // namespace turi

#endif /* _VARIANT_DEEP_SERIALIZE_H_ */