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