ceph/src/boost/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 namespace interprocess {
  30
  31 //!Type to indicate to a mutex lock constructor that must not lock the mutex.
  32 struct defer_lock_type{};
  33 //!Type to indicate to a mutex lock constructor that must try to lock the mutex.
  34 struct try_to_lock_type {};
  35 //!Type to indicate to a mutex lock constructor that the mutex is already locked.
  36 struct accept_ownership_type{};
  37
  38 //!An object indicating that the locking
  39 //!must be deferred.
  40 static const defer_lock_type      defer_lock      = defer_lock_type();
  41
  42 //!An object indicating that a try_lock()
  43 //!operation must be executed.
  44 static const try_to_lock_type     try_to_lock    = try_to_lock_type();
  45
  46 //!An object indicating that the ownership of lockable
  47 //!object must be accepted by the new owner.
  48 static const accept_ownership_type  accept_ownership = accept_ownership_type();
  49
  50 } // namespace interprocess {
  51 } // namespace boost{
  52
  53 #include <boost/interprocess/detail/config_end.hpp>
  54
  55 #endif // BOOST_INTERPROCESS_LOCK_OPTIONS_HPP