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author | Remko Tronçon <git@el-tramo.be> | 2009-06-01 08:48:42 (GMT) |
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committer | Remko Tronçon <git@el-tramo.be> | 2009-06-01 09:24:28 (GMT) |
commit | 2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch) | |
tree | d46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp | |
download | swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.zip swift-contrib-2812bddd81f8a1b804c7460f4e14cd0aa393d129.tar.bz2 |
Import.
Diffstat (limited to '3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp')
-rw-r--r-- | 3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp b/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp new file mode 100644 index 0000000..05f7867 --- /dev/null +++ b/3rdParty/Boost/boost/smart_ptr/detail/atomic_count_pthreads.hpp @@ -0,0 +1,96 @@ +#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED +#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED + +// +// boost/detail/atomic_count_pthreads.hpp +// +// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd. +// +// Distributed under the Boost Software License, Version 1.0. (See +// accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// + +#include <pthread.h> + +// +// The generic pthread_mutex-based implementation sometimes leads to +// inefficiencies. Example: a class with two atomic_count members +// can get away with a single mutex. +// +// Users can detect this situation by checking BOOST_AC_USE_PTHREADS. +// + +namespace boost +{ + +namespace detail +{ + +class atomic_count +{ +private: + + class scoped_lock + { + public: + + scoped_lock(pthread_mutex_t & m): m_(m) + { + pthread_mutex_lock(&m_); + } + + ~scoped_lock() + { + pthread_mutex_unlock(&m_); + } + + private: + + pthread_mutex_t & m_; + }; + +public: + + explicit atomic_count(long v): value_(v) + { + pthread_mutex_init(&mutex_, 0); + } + + ~atomic_count() + { + pthread_mutex_destroy(&mutex_); + } + + long operator++() + { + scoped_lock lock(mutex_); + return ++value_; + } + + long operator--() + { + scoped_lock lock(mutex_); + return --value_; + } + + operator long() const + { + scoped_lock lock(mutex_); + return value_; + } + +private: + + atomic_count(atomic_count const &); + atomic_count & operator=(atomic_count const &); + + mutable pthread_mutex_t mutex_; + long value_; +}; + +} // namespace detail + +} // namespace boost + +#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED |