diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp | 316 |
1 files changed, 158 insertions, 158 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp index f6e3904..2bd790e 100644 --- a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp +++ b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp @@ -1,158 +1,158 @@ -#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; - 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_ ) == 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 +#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;
+ 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_ ) == 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
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