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Diffstat (limited to 'src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_aix.hpp')
-rw-r--r-- | src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_aix.hpp | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_aix.hpp b/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_aix.hpp deleted file mode 100644 index 0208678aee4..00000000000 --- a/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_aix.hpp +++ /dev/null @@ -1,142 +0,0 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_AIX_HPP_INCLUDED -#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_AIX_HPP_INCLUDED - -// -// detail/sp_counted_base_aix.hpp -// based on: detail/sp_counted_base_w32.hpp -// -// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. -// Copyright 2004-2005 Peter Dimov -// Copyright 2006 Michael van der Westhuizen -// -// 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/detail/sp_typeinfo.hpp> -#include <builtins.h> -#include <sys/atomic_op.h> - -namespace boost -{ - -namespace detail -{ - -inline void atomic_increment( int32_t* pw ) -{ - // ++*pw; - - fetch_and_add( pw, 1 ); -} - -inline int32_t atomic_decrement( int32_t * pw ) -{ - // return --*pw; - - int32_t originalValue; - - __lwsync(); - originalValue = fetch_and_add( pw, -1 ); - __isync(); - - return (originalValue - 1); -} - -inline int32_t atomic_conditional_increment( int32_t * pw ) -{ - // if( *pw != 0 ) ++*pw; - // return *pw; - - int32_t tmp = fetch_and_add( pw, 0 ); - for( ;; ) - { - if( tmp == 0 ) return 0; - if( compare_and_swap( pw, &tmp, tmp + 1 ) ) return (tmp + 1); - } -} - -class sp_counted_base -{ -private: - - sp_counted_base( sp_counted_base const & ); - sp_counted_base & operator= ( sp_counted_base const & ); - - int32_t use_count_; // #shared - int32_t 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; - - void add_ref_copy() - { - atomic_increment( &use_count_ ); - } - - bool add_ref_lock() // true on success - { - return atomic_conditional_increment( &use_count_ ) != 0; - } - - void release() // nothrow - { - if( atomic_decrement( &use_count_ ) == 0 ) - { - dispose(); - weak_release(); - } - } - - void weak_add_ref() // nothrow - { - atomic_increment( &weak_count_ ); - } - - void weak_release() // nothrow - { - if( atomic_decrement( &weak_count_ ) == 0 ) - { - destroy(); - } - } - - long use_count() const // nothrow - { - return fetch_and_add( const_cast<int32_t*>(&use_count_), 0 ); - } -}; - -} // namespace detail - -} // namespace boost - -#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_AIX_HPP_INCLUDED |