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Viewing changes to src/ext/boost/smart_ptr/detail/atomic_count_pthreads.hpp

  • Committer: Package Import Robot
  • Author(s): Fathi Boudra
  • Date: 2012-08-11 09:33:38 UTC
  • mfrom: (1.1.5)
  • Revision ID: package-import@ubuntu.com-20120811093338-fgrx41ftqew3qt6a
Tags: 2.3.3.4-1
http://bugs.debian.org/661703
* New upstream release (Closes: #661703).
* Convert package to multiarch.
* Drop obsolete patches:
  - 01_add_missing_include_bug505667.diff
  - 02_posixness_fix_bug530308.diff
* Add patches:
  - Fixing_ZLIB_configuration_in_shared_CMakeLists.patch
  - Fix-pkgconfig-file-by-adding-clucene-shared-library.patch
  - Install-contribs-lib.patch
  - multiarch.patch
* Update debian/compat: bump to 8.
* Update debian/control:
  - update build dependencies (add cmake, libboost-dev and libz-dev).
  - bump Standards-Version to 3.9.3.
  - rename packages due to ABI bump: libclucene0ldbl -> libclucene-core1.
  - add libclucene-contribs1 package.
* Update debian/rules:
  - rewrite to use CMake.
  - add multiarch support.

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src/ext/boost/smart_ptr/detail/atomic_count_pthreads.hpp
 
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#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED
 
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#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED
 
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//
 
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//  boost/detail/atomic_count_pthreads.hpp
 
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//
 
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//  Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
 
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//
 
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// Distributed under the Boost Software License, Version 1.0. (See
 
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// accompanying file LICENSE_1_0.txt or copy at
 
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// http://www.boost.org/LICENSE_1_0.txt)
 
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//
 
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#include <pthread.h>
 
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//
 
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//  The generic pthread_mutex-based implementation sometimes leads to
 
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//    inefficiencies. Example: a class with two atomic_count members
 
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//    can get away with a single mutex.
 
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//
 
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//  Users can detect this situation by checking BOOST_AC_USE_PTHREADS.
 
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//
 
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namespace boost
 
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{
 
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namespace detail
 
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{
 
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class atomic_count
 
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{
 
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private:
 
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    class scoped_lock
 
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    {
 
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    public:
 
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        scoped_lock(pthread_mutex_t & m): m_(m)
 
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        {
 
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            pthread_mutex_lock(&m_);
 
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        }
 
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        ~scoped_lock()
 
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        {
 
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            pthread_mutex_unlock(&m_);
 
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        }
 
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    private:
 
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        pthread_mutex_t & m_;
 
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    };
 
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public:
 
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    explicit atomic_count(long v): value_(v)
 
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    {
 
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        pthread_mutex_init(&mutex_, 0);
 
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    }
 
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    ~atomic_count()
 
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    {
 
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        pthread_mutex_destroy(&mutex_);
 
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    }
 
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    long operator++()
 
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    {
 
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        scoped_lock lock(mutex_);
 
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        return ++value_;
 
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    }
 
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    long operator--()
 
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    {
 
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        scoped_lock lock(mutex_);
 
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        return --value_;
 
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    }
 
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    operator long() const
 
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    {
 
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        scoped_lock lock(mutex_);
 
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        return value_;
 
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    }
 
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private:
 
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    atomic_count(atomic_count const &);
 
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    atomic_count & operator=(atomic_count const &);
 
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    mutable pthread_mutex_t mutex_;
 
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    long value_;
 
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};
 
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} // namespace detail
 
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} // namespace boost
 
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_PTHREADS_HPP_INCLUDED