text: #ifndef BOOST_THREAD_ONCE_HPP
  #define BOOST_THREAD_ONCE_HPP
  
  //  once.hpp
  //
  //  (C) Copyright 2006-7 Anthony Williams
  //
  //  Distributed under the Boost Software License, Version 1.0. (See
  //  accompanying file LICENSE_1_0.txt or copy at
  //  http://www.boost.org/LICENSE_1_0.txt)
  
  #include <boost/thread/detail/config.hpp>
  
  #ifdef BOOST_MSVC
  # pragma warning(push)
  # pragma warning(disable: 4702) // unreachable code
  #endif
  
  #include <boost/thread/detail/platform.hpp>
  #if defined(BOOST_THREAD_PLATFORM_WIN32)
  #include <boost/thread/win32/once.hpp>
  #elif defined(BOOST_THREAD_PLATFORM_PTHREAD)
  #if defined BOOST_THREAD_ONCE_FAST_EPOCH
  #include <boost/thread/pthread/once.hpp>
  #elif defined BOOST_THREAD_ONCE_ATOMIC
  #include <boost/thread/pthread/once_atomic.hpp>
  #else
  #error "Once Not Implemented"
  #endif
  #else
  #error "Boost threads unavailable on this platform"
  #endif
  
  #include <boost/config/abi_prefix.hpp>
  
  namespace boost
  {
    // template<class Callable, class ...Args> void
    // call_once(once_flag& flag, Callable&& func, Args&&... args);
  template<typename Function>
  inline void call_once(Function func,boost::once_flag& flag)
  //inline void call_once(void (*func)(),once_flag& flag)
      {
          call_once(flag,func);
      }
  }
  
  #include <boost/config/abi_suffix.hpp>
  
  #ifdef BOOST_MSVC
  # pragma warning(pop)
  #endif
  
  #endif
  