C++17, C++14, C++11 に併せた std::shared_mutex, std::shared_timed_mutex, std::mutex から mutex_type, read_lock_type, write_lock_type を扱う例 ref: http://qiita.com/usagi/items/4f4ee0df34688fa5c503

file0.cpp

#pragma once

#if __cplusplus >= 201402
  #include <shared_mutex>
#else
  #include <mutex>
#endif

namespace usagi
{
  namespace mutex
  {
#if __cplusplus > 201402
    // C++17
    using read_write_mutex_type = std::shared_mutex;
    using read_lock_type = std::shared_lock< read_write_mutex_type >;
    using write_lock_type = std::lock_guard< read_write_mutex_type >;
#elif __cplusplus == 201402
    // C++14
    using read_write_mutex_type = std::shared_timed_mutex;
    using read_lock_type = std::shared_lock< read_write_mutex_type >;
    using write_lock_type = std::lock_guard< read_write_mutex_type >;
#elif __cplusplus >= 201103
    // C++11
    using read_write_mutex_type = std::mutex;
    using read_lock_type = std::lock_guard< read_write_mutex_type >;
    using write_lock_type = std::lock_guard< read_write_mutex_type >;
#else
    #error not supported
#endif
  }
}

file1.cpp

class my_example_type
{
  my_something_type                   my_something;
  usagi::mutex::read_write_mutex_type my_mutex_for_something;

public:

  auto get_something_sum_of_xyz()
  {
    usagi::mutex::read_lock_type read_lock( my_mutex_for_something );
    return my_something.x + my_something.y + my_something.z;
  }

  auto set_something_sum_of_xyz( const somevalue_type x, const somevalue_type y, const somevalue_type z )
  {
    usagi::mutex::write_lock_type write_lock( my_mutex_for_something );
    my_something.x = x;
    my_something.y = y;
    my_something.z = z;
  }
}