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Diffstat (limited to 'src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp')
-rw-r--r-- | src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp b/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp deleted file mode 100644 index d122a49bdb2..00000000000 --- a/src/third_party/boost/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp +++ /dev/null @@ -1,157 +0,0 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED -#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED - -// -// detail/sp_counted_base_gcc_ia64.hpp - g++ on IA64 -// -// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. -// Copyright 2004-2006 Peter Dimov -// Copyright 2005 Ben Hutchings -// -// 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 -// - -#include <boost/detail/sp_typeinfo.hpp> - -namespace boost -{ - -namespace detail -{ - -inline void atomic_increment( int * pw ) -{ - // ++*pw; - - int tmp; - - // No barrier is required here but fetchadd always has an acquire or - // release barrier associated with it. We choose release as it should be - // cheaper. - __asm__ ("fetchadd4.rel %0=%1,1" : - "=r"(tmp), "=m"(*pw) : - "m"( *pw )); -} - -inline int atomic_decrement( int * pw ) -{ - // return --*pw; - - int rv; - - __asm__ (" fetchadd4.rel %0=%1,-1 ;; \n" - " cmp.eq p7,p0=1,%0 ;; \n" - "(p7) ld4.acq %0=%1 " : - "=&r"(rv), "=m"(*pw) : - "m"( *pw ) : - "p7"); - - return rv; -} - -inline int atomic_conditional_increment( int * pw ) -{ - // if( *pw != 0 ) ++*pw; - // return *pw; - - int rv, tmp, tmp2; - - __asm__ ("0: ld4 %0=%3 ;; \n" - " cmp.eq p7,p0=0,%0 ;; \n" - "(p7) br.cond.spnt 1f \n" - " mov ar.ccv=%0 \n" - " add %1=1,%0 ;; \n" - " cmpxchg4.acq %2=%3,%1,ar.ccv ;; \n" - " cmp.ne p7,p0=%0,%2 ;; \n" - "(p7) br.cond.spnt 0b \n" - " mov %0=%1 ;; \n" - "1:" : - "=&r"(rv), "=&r"(tmp), "=&r"(tmp2), "=m"(*pw) : - "m"( *pw ) : - "ar.ccv", "p7"); - - return rv; -} - -class sp_counted_base -{ -private: - - sp_counted_base( sp_counted_base const & ); - sp_counted_base & operator= ( sp_counted_base const & ); - - int use_count_; // #shared - int 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 static_cast<int const volatile &>( use_count_ ); // TODO use ld.acq here - } -}; - -} // namespace detail - -} // namespace boost - -#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_IA64_HPP_INCLUDED |