Merge c:/dyninst/pc_bluegene/dyninst into dyn_pc_integration
[dyninst.git] / external / boost / detail / spinlock_pool.hpp
1 #ifndef BOOST_DETAIL_SPINLOCK_POOL_HPP_INCLUDED
2 #define BOOST_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/detail/spinlock.hpp>
26 #include <cstddef>
27
28 namespace boost
29 {
30
31 namespace detail
32 {
33
34 template< int I > 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         std::size_t i = reinterpret_cast< std::size_t >( pv ) % 41;
45         return pool_[ i ];
46     }
47
48     class scoped_lock
49     {
50     private:
51
52         spinlock & sp_;
53
54         scoped_lock( scoped_lock const & );
55         scoped_lock & operator=( scoped_lock const & );
56
57     public:
58
59         explicit scoped_lock( void const * pv ): sp_( spinlock_for( pv ) )
60         {
61             sp_.lock();
62         }
63
64         ~scoped_lock()
65         {
66             sp_.unlock();
67         }
68     };
69 };
70
71 template< int I > spinlock spinlock_pool< I >::pool_[ 41 ] =
72 {
73     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
74     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
75     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
76     BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, BOOST_DETAIL_SPINLOCK_INIT, 
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
82 };
83
84 } // namespace detail
85 } // namespace boost
86
87 #endif // #ifndef BOOST_DETAIL_SPINLOCK_POOL_HPP_INCLUDED