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1 | #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_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 | // Copyright (c) 2008 Peter Dimov | |
12 | // | |
13 | // Distributed under the Boost Software License, Version 1.0. | |
14 | // See accompanying file LICENSE_1_0.txt or copy at | |
15 | // http://www.boost.org/LICENSE_1_0.txt) | |
16 | // | |
17 | ||
18 | #include <pthread.h> | |
19 | ||
20 | namespace boost | |
21 | { | |
22 | ||
23 | namespace detail | |
24 | { | |
25 | ||
26 | class spinlock | |
27 | { | |
28 | public: | |
29 | ||
30 | pthread_mutex_t v_; | |
31 | ||
32 | public: | |
33 | ||
34 | bool try_lock() | |
35 | { | |
36 | return pthread_mutex_trylock( &v_ ) == 0; | |
37 | } | |
38 | ||
39 | void lock() | |
40 | { | |
41 | pthread_mutex_lock( &v_ ); | |
42 | } | |
43 | ||
44 | void unlock() | |
45 | { | |
46 | pthread_mutex_unlock( &v_ ); | |
47 | } | |
48 | ||
49 | public: | |
50 | ||
51 | class scoped_lock | |
52 | { | |
53 | private: | |
54 | ||
55 | spinlock & sp_; | |
56 | ||
57 | scoped_lock( scoped_lock const & ); | |
58 | scoped_lock & operator=( scoped_lock const & ); | |
59 | ||
60 | public: | |
61 | ||
62 | explicit scoped_lock( spinlock & sp ): sp_( sp ) | |
63 | { | |
64 | sp.lock(); | |
65 | } | |
66 | ||
67 | ~scoped_lock() | |
68 | { | |
69 | sp_.unlock(); | |
70 | } | |
71 | }; | |
72 | }; | |
73 | ||
74 | } // namespace detail | |
75 | } // namespace boost | |
76 | ||
77 | #define BOOST_DETAIL_SPINLOCK_INIT { PTHREAD_MUTEX_INITIALIZER } | |
78 | ||
79 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED |