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1 | #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED | |
3 | ||
4 | // MS compatible compilers support #pragma once | |
5 | ||
6 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
7 | # pragma once | |
8 | #endif | |
9 | ||
10 | // | |
11 | // boost/detail/spinlock_pool.hpp | |
12 | // | |
13 | // Copyright (c) 2008 Peter Dimov | |
14 | // | |
15 | // Distributed under the Boost Software License, Version 1.0. | |
16 | // See accompanying file LICENSE_1_0.txt or copy at | |
17 | // http://www.boost.org/LICENSE_1_0.txt) | |
18 | // | |
19 | // spinlock_pool<0> is reserved for atomic<>, when/if it arrives | |
20 | // spinlock_pool<1> is reserved for shared_ptr reference counts | |
21 | // spinlock_pool<2> is reserved for shared_ptr atomic access | |
22 | // | |
23 | ||
24 | #include <boost/config.hpp> | |
25 | #include <boost/smart_ptr/detail/spinlock.hpp> | |
26 | #include <cstddef> | |
27 | ||
28 | namespace boost | |
29 | { | |
30 | ||
31 | namespace detail | |
32 | { | |
33 | ||
34 | template< int M > class spinlock_pool | |
35 | { | |
36 | private: | |
37 | ||
38 | static spinlock pool_[ 41 ]; | |
39 | ||
40 | public: | |
41 | ||
42 | static spinlock & spinlock_for( void const * pv ) | |
43 | { | |
44 | #if defined(__VMS) && __INITIAL_POINTER_SIZE == 64 | |
45 | std::size_t i = reinterpret_cast< unsigned long long >( pv ) % 41; | |
46 | #else | |
47 | std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41; | |
48 | #endif | |
49 | return pool_[ i ]; | |
50 | } | |
51 | ||
52 | class scoped_lock | |
53 | { | |
54 | private: | |
55 | ||
56 | spinlock & sp_; | |
57 | ||
58 | scoped_lock( scoped_lock const & ); | |
59 | scoped_lock & operator=( scoped_lock const & ); | |
60 | ||
61 | public: | |
62 | ||
63 | explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) ) | |
64 | { | |
65 | sp_.lock(); | |
66 | } | |
67 | ||
68 | ~scoped_lock() | |
69 | { | |
70 | sp_.unlock(); | |
71 | } | |
72 | }; | |
73 | }; | |
74 | ||
75 | template< int M > spinlock spinlock_pool< M >::pool_[ 41 ] = | |
76 | { | |
77 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
78 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
79 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
80 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
81 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
82 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
83 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
84 | BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, | |
85 | BOOST_DETAIL_SPINLOCK_INIT | |
86 | }; | |
87 | ||
88 | } // namespace detail | |
89 | } // namespace boost | |
90 | ||
91 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_POOL_HPP_INCLUDED |