1 // Copyright (C) 2001-2003

     2 // William E. Kempf

     3 //

     4 //  Distributed under the Boost Software License, Version 1.0. (See accompanying 

     5 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

     6 

     7 #ifndef BOOST_ONCE_WEK080101_HPP

     8 #define BOOST_ONCE_WEK080101_HPP

     9 

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

    11 

    12 #if defined(BOOST_HAS_PTHREADS)

    13 #   include <pthread.h>

    14 #endif

    15 

    16 namespace boost {

    17 

    18 #if defined(BOOST_HAS_PTHREADS)

    19 

    20 typedef pthread_once_t once_flag;

    21 #define BOOST_ONCE_INIT PTHREAD_ONCE_INIT

    22 

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

    24 

    25 typedef long once_flag;

    26 #define BOOST_ONCE_INIT 0

    27 

    28 #endif

    29 

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

    31 

    32 } // namespace boost

    33 

    34 // Change Log:

    35 //   1 Aug 01  WEKEMPF Initial version.

    36 

    37 #endif // BOOST_ONCE_WEK080101_HPP