// Copyright (C) 2001-2003

 // William E. Kempf

 //

 //  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)

 #ifndef BOOST_ONCE_WEK080101_HPP

 #define BOOST_ONCE_WEK080101_HPP

 #include <boost/thread/detail/config.hpp>

 #if defined(BOOST_HAS_PTHREADS)

 #   include <pthread.h>

 #endif

 namespace boost {

 #if defined(BOOST_HAS_PTHREADS)

 typedef pthread_once_t once_flag;

 #define BOOST_ONCE_INIT PTHREAD_ONCE_INIT

 #elif (defined(BOOST_HAS_WINTHREADS) || defined(BOOST_HAS_MPTASKS))

 typedef long once_flag;

 #define BOOST_ONCE_INIT 0

 #endif

 void BOOST_THREAD_DECL call_once(void (*func)(), once_flag& flag);

 } // namespace boost

 // Change Log:

 //   1 Aug 01  WEKEMPF Initial version.

 #endif // BOOST_ONCE_WEK080101_HPP