diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp | 348 |
1 files changed, 174 insertions, 174 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp index 173dce5..7887782 100644 --- a/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp +++ b/contrib/src/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp @@ -1,174 +1,174 @@ -#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED -#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED - -// MS compatible compilers support #pragma once - -#if defined(_MSC_VER) && (_MSC_VER >= 1020) -# pragma once -#endif - -// -// detail/sp_counted_base_gcc_x86.hpp - g++ on 486+ or AMD64 -// -// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. -// Copyright 2004-2005 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) -// -// -// Lock-free algorithm by Alexander Terekhov -// -// Thanks to Ben Hitchings for the #weak + (#shared != 0) -// formulation -// - -#include <boost/detail/sp_typeinfo.hpp> - -namespace boost -{ - -namespace detail -{ - -inline int atomic_exchange_and_add( int * pw, int dv ) -{ - // int r = *pw; - // *pw += dv; - // return r; - - int r; - - __asm__ __volatile__ - ( - "lock\n\t" - "xadd %1, %0": - "=m"( *pw ), "=r"( r ): // outputs (%0, %1) - "m"( *pw ), "1"( dv ): // inputs (%2, %3 == %1) - "memory", "cc" // clobbers - ); - - return r; -} - -inline void atomic_increment( int * pw ) -{ - //atomic_exchange_and_add( pw, 1 ); - - __asm__ - ( - "lock\n\t" - "incl %0": - "=m"( *pw ): // output (%0) - "m"( *pw ): // input (%1) - "cc" // clobbers - ); -} - -inline int atomic_conditional_increment( int * pw ) -{ - // int rv = *pw; - // if( rv != 0 ) ++*pw; - // return rv; - - int rv, tmp; - - __asm__ - ( - "movl %0, %%eax\n\t" - "0:\n\t" - "test %%eax, %%eax\n\t" - "je 1f\n\t" - "movl %%eax, %2\n\t" - "incl %2\n\t" - "lock\n\t" - "cmpxchgl %2, %0\n\t" - "jne 0b\n\t" - "1:": - "=m"( *pw ), "=&a"( rv ), "=&r"( tmp ): // outputs (%0, %1, %2) - "m"( *pw ): // input (%3) - "cc" // clobbers - ); - - 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_exchange_and_add( &use_count_, -1 ) == 1 ) - { - dispose(); - weak_release(); - } - } - - void weak_add_ref() // nothrow - { - atomic_increment( &weak_count_ ); - } - - void weak_release() // nothrow - { - if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 ) - { - destroy(); - } - } - - long use_count() const // nothrow - { - return static_cast<int const volatile &>( use_count_ ); - } -}; - -} // namespace detail - -} // namespace boost - -#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED +#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// detail/sp_counted_base_gcc_x86.hpp - g++ on 486+ or AMD64
+//
+// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
+// Copyright 2004-2005 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)
+//
+//
+// Lock-free algorithm by Alexander Terekhov
+//
+// Thanks to Ben Hitchings for the #weak + (#shared != 0)
+// formulation
+//
+
+#include <boost/detail/sp_typeinfo.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline int atomic_exchange_and_add( int * pw, int dv )
+{
+ // int r = *pw;
+ // *pw += dv;
+ // return r;
+
+ int r;
+
+ __asm__ __volatile__
+ (
+ "lock\n\t"
+ "xadd %1, %0":
+ "=m"( *pw ), "=r"( r ): // outputs (%0, %1)
+ "m"( *pw ), "1"( dv ): // inputs (%2, %3 == %1)
+ "memory", "cc" // clobbers
+ );
+
+ return r;
+}
+
+inline void atomic_increment( int * pw )
+{
+ //atomic_exchange_and_add( pw, 1 );
+
+ __asm__
+ (
+ "lock\n\t"
+ "incl %0":
+ "=m"( *pw ): // output (%0)
+ "m"( *pw ): // input (%1)
+ "cc" // clobbers
+ );
+}
+
+inline int atomic_conditional_increment( int * pw )
+{
+ // int rv = *pw;
+ // if( rv != 0 ) ++*pw;
+ // return rv;
+
+ int rv, tmp;
+
+ __asm__
+ (
+ "movl %0, %%eax\n\t"
+ "0:\n\t"
+ "test %%eax, %%eax\n\t"
+ "je 1f\n\t"
+ "movl %%eax, %2\n\t"
+ "incl %2\n\t"
+ "lock\n\t"
+ "cmpxchgl %2, %0\n\t"
+ "jne 0b\n\t"
+ "1:":
+ "=m"( *pw ), "=&a"( rv ), "=&r"( tmp ): // outputs (%0, %1, %2)
+ "m"( *pw ): // input (%3)
+ "cc" // clobbers
+ );
+
+ 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_exchange_and_add( &use_count_, -1 ) == 1 )
+ {
+ dispose();
+ weak_release();
+ }
+ }
+
+ void weak_add_ref() // nothrow
+ {
+ atomic_increment( &weak_count_ );
+ }
+
+ void weak_release() // nothrow
+ {
+ if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 )
+ {
+ destroy();
+ }
+ }
+
+ long use_count() const // nothrow
+ {
+ return static_cast<int const volatile &>( use_count_ );
+ }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_X86_HPP_INCLUDED
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