ceph/src/boost/libs/interprocess/include/boost/interprocess/sync/lock_options.hpp

   1 //////////////////////////////////////////////////////////////////////////////
   2 //
   3 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
   4 // Software License, Version 1.0. (See accompanying file
   5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7 // See http://www.boost.org/libs/interprocess for documentation.
   8 //
   9 //////////////////////////////////////////////////////////////////////////////
  10
  11 #ifndef BOOST_INTERPROCESS_LOCK_OPTIONS_HPP
  12 #define BOOST_INTERPROCESS_LOCK_OPTIONS_HPP
  13
  14 #ifndef BOOST_CONFIG_HPP
  15 #  include <boost/config.hpp>
  16 #endif
  17 #
  18 #if defined(BOOST_HAS_PRAGMA_ONCE)
  19 #  pragma once
  20 #endif
  21
  22 #include <boost/interprocess/detail/config_begin.hpp>
  23 #include <boost/interprocess/detail/workaround.hpp>
  24
  25 //!\file
  26 //!Describes the lock options with associated with interprocess_mutex lock constructors.
  27
  28 namespace boost {
  29
  30 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  31
  32 namespace posix_time
  33 {  class ptime;   }
  34
  35 #endif   //#if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
  36
  37 namespace interprocess {
  38
  39 //!Type to indicate to a mutex lock constructor that must not lock the mutex.
  40 struct defer_lock_type{};
  41 //!Type to indicate to a mutex lock constructor that must try to lock the mutex.
  42 struct try_to_lock_type {};
  43 //!Type to indicate to a mutex lock constructor that the mutex is already locked.
  44 struct accept_ownership_type{};
  45
  46 //!An object indicating that the locking
  47 //!must be deferred.
  48 static const defer_lock_type      defer_lock      = defer_lock_type();
  49
  50 //!An object indicating that a try_lock()
  51 //!operation must be executed.
  52 static const try_to_lock_type     try_to_lock    = try_to_lock_type();
  53
  54 //!An object indicating that the ownership of lockable
  55 //!object must be accepted by the new owner.
  56 static const accept_ownership_type  accept_ownership = accept_ownership_type();
  57
  58 } // namespace interprocess {
  59 } // namespace boost{
  60
  61 #include <boost/interprocess/detail/config_end.hpp>
  62
  63 #endif // BOOST_INTERPROCESS_LOCK_OPTIONS_HPP