diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp | 262 |
1 files changed, 131 insertions, 131 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp b/contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp index 7126f8d..4ba509c 100644 --- a/contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp +++ b/contrib/src/boost/smart_ptr/detail/sp_counted_base_w32.hpp @@ -1,131 +1,131 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//
-// detail/sp_counted_base_w32.hpp
-//
-// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
-// Copyright 2004-2005 Peter Dimov
-//
-// 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)
-//
-//
-// Lock-free algorithm by Alexander Terekhov
-//
-// Thanks to Ben Hitchings for the #weak + (#shared != 0)
-// formulation
-//
-
-#include <boost/smart_ptr/detail/sp_interlocked.hpp>
-#include <boost/detail/workaround.hpp>
-#include <boost/detail/sp_typeinfo.hpp>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class sp_counted_base
-{
-private:
-
- sp_counted_base( sp_counted_base const & );
- sp_counted_base & operator= ( sp_counted_base const & );
-
- long use_count_; // #shared
- long weak_count_; // #weak + (#shared != 0)
-
-public:
-
- sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
- {
- }
-
- virtual ~sp_counted_base() // nothrow
- {
- }
-
- // dispose() is called when use_count_ drops to zero, to release
- // the resources managed by *this.
-
- virtual void dispose() = 0; // nothrow
-
- // destroy() is called when weak_count_ drops to zero.
-
- virtual void destroy() // nothrow
- {
- delete this;
- }
-
- virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
- virtual void * get_untyped_deleter() = 0;
-
- void add_ref_copy()
- {
- BOOST_SP_INTERLOCKED_INCREMENT( &use_count_ );
- }
-
- bool add_ref_lock() // true on success
- {
- for( ;; )
- {
- long tmp = static_cast< long const volatile& >( use_count_ );
- if( tmp == 0 ) return false;
-
-#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, == 1200 )
-
- // work around a code generation bug
-
- long tmp2 = tmp + 1;
- if( BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp2, tmp ) == tmp2 - 1 ) return true;
-
-#else
-
- if( BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp + 1, tmp ) == tmp ) return true;
-
-#endif
- }
- }
-
- void release() // nothrow
- {
- if( BOOST_SP_INTERLOCKED_DECREMENT( &use_count_ ) == 0 )
- {
- dispose();
- weak_release();
- }
- }
-
- void weak_add_ref() // nothrow
- {
- BOOST_SP_INTERLOCKED_INCREMENT( &weak_count_ );
- }
-
- void weak_release() // nothrow
- {
- if( BOOST_SP_INTERLOCKED_DECREMENT( &weak_count_ ) == 0 )
- {
- destroy();
- }
- }
-
- long use_count() const // nothrow
- {
- return static_cast<long const volatile &>( use_count_ );
- }
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED
+#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED +#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED + +// MS compatible compilers support #pragma once + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +// +// detail/sp_counted_base_w32.hpp +// +// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. +// Copyright 2004-2005 Peter Dimov +// +// 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) +// +// +// Lock-free algorithm by Alexander Terekhov +// +// Thanks to Ben Hitchings for the #weak + (#shared != 0) +// formulation +// + +#include <boost/smart_ptr/detail/sp_interlocked.hpp> +#include <boost/detail/workaround.hpp> +#include <boost/detail/sp_typeinfo.hpp> + +namespace boost +{ + +namespace detail +{ + +class sp_counted_base +{ +private: + + sp_counted_base( sp_counted_base const & ); + sp_counted_base & operator= ( sp_counted_base const & ); + + long use_count_; // #shared + long weak_count_; // #weak + (#shared != 0) + +public: + + sp_counted_base(): use_count_( 1 ), weak_count_( 1 ) + { + } + + virtual ~sp_counted_base() // nothrow + { + } + + // dispose() is called when use_count_ drops to zero, to release + // the resources managed by *this. + + virtual void dispose() = 0; // nothrow + + // destroy() is called when weak_count_ drops to zero. + + virtual void destroy() // nothrow + { + delete this; + } + + virtual void * get_deleter( sp_typeinfo const & ti ) = 0; + virtual void * get_untyped_deleter() = 0; + + void add_ref_copy() + { + BOOST_SP_INTERLOCKED_INCREMENT( &use_count_ ); + } + + bool add_ref_lock() // true on success + { + for( ;; ) + { + long tmp = static_cast< long const volatile& >( use_count_ ); + if( tmp == 0 ) return false; + +#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, == 1200 ) + + // work around a code generation bug + + long tmp2 = tmp + 1; + if( BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp2, tmp ) == tmp2 - 1 ) return true; + +#else + + if( BOOST_SP_INTERLOCKED_COMPARE_EXCHANGE( &use_count_, tmp + 1, tmp ) == tmp ) return true; + +#endif + } + } + + void release() // nothrow + { + if( BOOST_SP_INTERLOCKED_DECREMENT( &use_count_ ) == 0 ) + { + dispose(); + weak_release(); + } + } + + void weak_add_ref() // nothrow + { + BOOST_SP_INTERLOCKED_INCREMENT( &weak_count_ ); + } + + void weak_release() // nothrow + { + if( BOOST_SP_INTERLOCKED_DECREMENT( &weak_count_ ) == 0 ) + { + destroy(); + } + } + + long use_count() const // nothrow + { + return static_cast<long const volatile &>( use_count_ ); + } +}; + +} // namespace detail + +} // namespace boost + +#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_W32_HPP_INCLUDED |