stc/exp/ml_stc_linux_make_v1.0/include/boost/smart_ptr/detail/spinlock_pool.hpp

   1 #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED\r
   2 #define BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED\r
   3 \r
   4 // MS compatible compilers support #pragma once\r
   5 \r
   6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)\r
   7 # pragma once\r
   8 #endif\r
   9 \r
  10 //\r
  11 //  boost/detail/spinlock_pool.hpp\r
  12 //\r
  13 //  Copyright (c) 2008 Peter Dimov\r
  14 //\r
  15 //  Distributed under the Boost Software License, Version 1.0.\r
  16 //  See accompanying file LICENSE_1_0.txt or copy at\r
  17 //  http://www.boost.org/LICENSE_1_0.txt)\r
  18 //\r
  19 //  spinlock_pool<0> is reserved for atomic<>, when/if it arrives\r
  20 //  spinlock_pool<1> is reserved for shared_ptr reference counts\r
  21 //  spinlock_pool<2> is reserved for shared_ptr atomic access\r
  22 //\r
  23 \r
  24 #include <boost/config.hpp>\r
  25 #include <boost/smart_ptr/detail/spinlock.hpp>\r
  26 #include <cstddef>\r
  27 \r
  28 namespace boost\r
  29 {\r
  30 \r
  31 namespace detail\r
  32 {\r
  33 \r
  34 template< int I > class spinlock_pool\r
  35 {\r
  36 private:\r
  37 \r
  38     static spinlock pool_[ 41 ];\r
  39 \r
  40 public:\r
  41 \r
  42     static spinlock & spinlock_for( void const * pv )\r
  43     {\r
  44         std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41;\r
  45         return pool_[ i ];\r
  46     }\r
  47 \r
  48     class scoped_lock\r
  49     {\r
  50     private:\r
  51 \r
  52         spinlock & sp_;\r
  53 \r
  54         scoped_lock( scoped_lock const & );\r
  55         scoped_lock & operator=( scoped_lock const & );\r
  56 \r
  57     public:\r
  58 \r
  59         explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) )\r
  60         {\r
  61             sp_.lock();\r
  62         }\r
  63 \r
  64         ~scoped_lock()\r
  65         {\r
  66             sp_.unlock();\r
  67         }\r
  68     };\r
  69 };\r
  70 \r
  71 template< int I > spinlock spinlock_pool< I >::pool_[ 41 ] =\r
  72 {\r
  73     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  74     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  75     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  76     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  77     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  78     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  79     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  80     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, \r
  81     BOOST_DETAIL_SPINLOCK_INIT\r
  82 };\r
  83 \r
  84 } // namespace detail\r
  85 } // namespace boost\r
  86 \r
  87 #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED\r