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[1022] | 1 | #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED |
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| 2 | #define BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_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 | // Copyright (c) 2008 Peter Dimov |
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| 12 | // |
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| 13 | // Distributed under the Boost Software License, Version 1.0. |
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| 14 | // See accompanying file LICENSE_1_0.txt or copy at |
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| 15 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 16 | // |
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| 17 | |
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| 18 | #include <pthread.h> |
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| 19 | |
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| 20 | namespace boost |
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| 21 | { |
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| 22 | |
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| 23 | namespace detail |
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| 24 | { |
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| 25 | |
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| 26 | class spinlock |
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| 27 | { |
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| 28 | public: |
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| 29 | |
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| 30 | pthread_mutex_t v_; |
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| 31 | |
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| 32 | public: |
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| 33 | |
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| 34 | bool try_lock() |
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| 35 | { |
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| 36 | return pthread_mutex_trylock( &v_ ) == 0; |
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| 37 | } |
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| 38 | |
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| 39 | void lock() |
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| 40 | { |
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| 41 | pthread_mutex_lock( &v_ ); |
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| 42 | } |
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| 43 | |
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| 44 | void unlock() |
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| 45 | { |
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| 46 | pthread_mutex_unlock( &v_ ); |
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| 47 | } |
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| 48 | |
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| 49 | public: |
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| 50 | |
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| 51 | class scoped_lock |
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| 52 | { |
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| 53 | private: |
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| 54 | |
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| 55 | spinlock & sp_; |
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| 56 | |
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| 57 | scoped_lock( scoped_lock const & ); |
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| 58 | scoped_lock & operator=( scoped_lock const & ); |
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| 59 | |
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| 60 | public: |
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| 61 | |
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| 62 | explicit scoped_lock( spinlock & sp ): sp_( sp ) |
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| 63 | { |
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| 64 | sp.lock(); |
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| 65 | } |
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| 66 | |
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| 67 | ~scoped_lock() |
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| 68 | { |
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| 69 | sp_.unlock(); |
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| 70 | } |
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| 71 | }; |
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| 72 | }; |
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| 73 | |
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| 74 | } // namespace detail |
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| 75 | } // namespace boost |
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| 76 | |
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| 77 | #define BOOST_DETAIL_SPINLOCK_INIT { PTHREAD_MUTEX_INITIALIZER } |
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| 78 | |
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| 79 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED |
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