1 #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SNC_PS3_HPP_INCLUDED
2 #define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SNC_PS3_HPP_INCLUDED
4 // MS compatible compilers support #pragma once
5 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
9 // detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+
11 // Copyright (c) 2006 Piotr Wyderski
12 // Copyright (c) 2006 Tomas Puverle
13 // Copyright (c) 2006 Peter Dimov
14 // Copyright (c) 2011 Emil Dotchevski
16 // Distributed under the Boost Software License, Version 1.0.
17 // See accompanying file LICENSE_1_0.txt or copy at
18 // http://www.boost.org/LICENSE_1_0.txt
20 // Thanks to Michael van der Westhuizen
22 #include <boost/detail/sp_typeinfo.hpp>
23 #include <inttypes.h> // uint32_t
31 inline uint32_t compare_and_swap( uint32_t * dest_, uint32_t compare_, uint32_t swap_ )
33 return __builtin_cellAtomicCompareAndSwap32(dest_,compare_,swap_);
36 inline uint32_t atomic_fetch_and_add( uint32_t * pw, uint32_t dv )
46 if( __builtin_expect((compare_and_swap(pw, r, r + dv) == r), 1) )
53 inline void atomic_increment( uint32_t * pw )
55 (void) __builtin_cellAtomicIncr32( pw );
58 inline uint32_t atomic_decrement( uint32_t * pw )
60 return __builtin_cellAtomicDecr32( pw );
63 inline uint32_t atomic_conditional_increment( uint32_t * pw )
66 // if( r != 0 ) ++*pw;
78 if( __builtin_expect( ( compare_and_swap( pw, r, r + 1 ) == r ), 1 ) )
89 sp_counted_base( sp_counted_base const & );
90 sp_counted_base & operator= ( sp_counted_base const & );
92 uint32_t use_count_; // #shared
93 uint32_t weak_count_; // #weak + (#shared != 0)
97 sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
101 virtual ~sp_counted_base() // nothrow
105 // dispose() is called when use_count_ drops to zero, to release
106 // the resources managed by *this.
108 virtual void dispose() = 0; // nothrow
110 // destroy() is called when weak_count_ drops to zero.
112 virtual void destroy() // nothrow
117 virtual void * get_deleter( sp_typeinfo const & ti ) = 0;
118 virtual void * get_untyped_deleter() = 0;
122 atomic_increment( &use_count_ );
125 bool add_ref_lock() // true on success
127 return atomic_conditional_increment( &use_count_ ) != 0;
130 void release() // nothrow
132 if( atomic_decrement( &use_count_ ) == 1 )
139 void weak_add_ref() // nothrow
141 atomic_increment( &weak_count_ );
144 void weak_release() // nothrow
146 if( atomic_decrement( &weak_count_ ) == 1 )
152 long use_count() const // nothrow
154 return const_cast< uint32_t const volatile & >( use_count_ );
158 } // namespace detail
162 #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SNC_PS3_HPP_INCLUDED