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Pods/Realm/include/core/realm/version_id.hpp 1.91 KB
75d24c15   yangbin   123
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  /*************************************************************************
   *
   * Copyright 2016 Realm Inc.
   *
   * Licensed 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.
   *
   **************************************************************************/
  
  #ifndef REALM_VERSION_ID_HPP
  #define REALM_VERSION_ID_HPP
  
  #if defined(_WIN32) && !defined(__STDC_LIMIT_MACROS)
  #define __STDC_LIMIT_MACROS
  #endif
  
  #include <cstdint>
  #include <limits>
  
  namespace realm {
  
  struct VersionID {
      using version_type = uint_fast64_t;
      version_type version = std::numeric_limits<version_type>::max();
      uint_fast32_t index = 0;
  
      VersionID()
      {
      }
      VersionID(version_type initial_version, uint_fast32_t initial_index)
      {
          version = initial_version;
          index = initial_index;
      }
  
      bool operator==(const VersionID& other) const
      {
          return version == other.version;
      }
      bool operator!=(const VersionID& other) const
      {
          return version != other.version;
      }
      bool operator<(const VersionID& other) const
      {
          return version < other.version;
      }
      bool operator<=(const VersionID& other) const
      {
          return version <= other.version;
      }
      bool operator>(const VersionID& other) const
      {
          return version > other.version;
      }
      bool operator>=(const VersionID& other) const
      {
          return version >= other.version;
      }
  };
  
  } // namespace realm
  
  #endif // REALM_VERSION_ID_HPP