diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp | 334 |
1 files changed, 167 insertions, 167 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp index febb597..c6d20ce 100644 --- a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp +++ b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp @@ -1,167 +1,167 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-// detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+
-//
-// Copyright (c) 2006 Piotr Wyderski
-// Copyright (c) 2006 Tomas Puverle
-// Copyright (c) 2006 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
-//
-// Thanks to Michael van der Westhuizen
-
-#include <boost/detail/sp_typeinfo.hpp>
-#include <inttypes.h> // int32_t
-
-namespace boost
-{
-
-namespace detail
-{
-
-inline int32_t compare_and_swap( int32_t * dest_, int32_t compare_, int32_t swap_ )
-{
- __asm__ __volatile__( "cas [%1], %2, %0"
- : "+r" (swap_)
- : "r" (dest_), "r" (compare_)
- : "memory" );
-
- return swap_;
-}
-
-inline int32_t atomic_fetch_and_add( int32_t * pw, int32_t dv )
-{
- // long r = *pw;
- // *pw += dv;
- // return r;
-
- for( ;; )
- {
- int32_t r = *pw;
-
- if( __builtin_expect((compare_and_swap(pw, r, r + dv) == r), 1) )
- {
- return r;
- }
- }
-}
-
-inline void atomic_increment( int32_t * pw )
-{
- atomic_fetch_and_add( pw, 1 );
-}
-
-inline int32_t atomic_decrement( int32_t * pw )
-{
- return atomic_fetch_and_add( pw, -1 );
-}
-
-inline int32_t atomic_conditional_increment( int32_t * pw )
-{
- // long r = *pw;
- // if( r != 0 ) ++*pw;
- // return r;
-
- for( ;; )
- {
- int32_t r = *pw;
-
- if( r == 0 )
- {
- return r;
- }
-
- if( __builtin_expect( ( compare_and_swap( pw, r, r + 1 ) == r ), 1 ) )
- {
- return r;
- }
- }
-}
-
-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;
- virtual void * get_untyped_deleter() = 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_ ) == 1 )
- {
- dispose();
- weak_release();
- }
- }
-
- void weak_add_ref() // nothrow
- {
- atomic_increment( &weak_count_ );
- }
-
- void weak_release() // nothrow
- {
- if( atomic_decrement( &weak_count_ ) == 1 )
- {
- destroy();
- }
- }
-
- long use_count() const // nothrow
- {
- return const_cast< int32_t const volatile & >( use_count_ );
- }
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED
+#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED +#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED + +// MS compatible compilers support #pragma once + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +// detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+ +// +// Copyright (c) 2006 Piotr Wyderski +// Copyright (c) 2006 Tomas Puverle +// Copyright (c) 2006 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 +// +// Thanks to Michael van der Westhuizen + +#include <boost/detail/sp_typeinfo.hpp> +#include <inttypes.h> // int32_t + +namespace boost +{ + +namespace detail +{ + +inline int32_t compare_and_swap( int32_t * dest_, int32_t compare_, int32_t swap_ ) +{ + __asm__ __volatile__( "cas [%1], %2, %0" + : "+r" (swap_) + : "r" (dest_), "r" (compare_) + : "memory" ); + + return swap_; +} + +inline int32_t atomic_fetch_and_add( int32_t * pw, int32_t dv ) +{ + // long r = *pw; + // *pw += dv; + // return r; + + for( ;; ) + { + int32_t r = *pw; + + if( __builtin_expect((compare_and_swap(pw, r, r + dv) == r), 1) ) + { + return r; + } + } +} + +inline void atomic_increment( int32_t * pw ) +{ + atomic_fetch_and_add( pw, 1 ); +} + +inline int32_t atomic_decrement( int32_t * pw ) +{ + return atomic_fetch_and_add( pw, -1 ); +} + +inline int32_t atomic_conditional_increment( int32_t * pw ) +{ + // long r = *pw; + // if( r != 0 ) ++*pw; + // return r; + + for( ;; ) + { + int32_t r = *pw; + + if( r == 0 ) + { + return r; + } + + if( __builtin_expect( ( compare_and_swap( pw, r, r + 1 ) == r ), 1 ) ) + { + return r; + } + } +} + +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; + virtual void * get_untyped_deleter() = 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_ ) == 1 ) + { + dispose(); + weak_release(); + } + } + + void weak_add_ref() // nothrow + { + atomic_increment( &weak_count_ ); + } + + void weak_release() // nothrow + { + if( atomic_decrement( &weak_count_ ) == 1 ) + { + destroy(); + } + } + + long use_count() const // nothrow + { + return const_cast< int32_t const volatile & >( use_count_ ); + } +}; + +} // namespace detail + +} // namespace boost + +#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_SPARC_HPP_INCLUDED |