comparison DEPENDENCIES/generic/include/boost/interprocess/smart_ptr/detail/shared_count.hpp @ 16:2665513ce2d3

Add boost headers

+//////////////////////////////////////////////////////////////////////////////
+//
+// This file is the adaptation for Interprocess of boost/detail/shared_count.hpp
+//
+// (C) Copyright Peter Dimov and Multi Media Ltd. 2001, 2002, 2003
+// (C) Copyright Peter Dimov 2004-2005
+// (C) Copyright Ion Gaztanaga 2006-2012. 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)
+//
+// See http://www.boost.org/libs/interprocess for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+#ifndef BOOST_INTERPROCESS_DETAIL_SHARED_COUNT_HPP_INCLUDED
+#define BOOST_INTERPROCESS_DETAIL_SHARED_COUNT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <boost/interprocess/detail/config_begin.hpp>
+#include <boost/interprocess/detail/workaround.hpp>
+
+#include <boost/checked_delete.hpp>
+#include <boost/intrusive/pointer_traits.hpp>
+#include <boost/interprocess/smart_ptr/detail/bad_weak_ptr.hpp>
+#include <boost/interprocess/smart_ptr/detail/sp_counted_impl.hpp>
+#include <boost/interprocess/detail/utilities.hpp>
+#include <boost/container/allocator_traits.hpp>
+#include <boost/detail/no_exceptions_support.hpp>
+#include <functional>       // std::less
+
+namespace boost {
+namespace interprocess {
+namespace ipcdetail{
+
+template<class T, class VoidAllocator, class Deleter>
+class weak_count;
+
+template<class T, class VoidAllocator, class Deleter>
+class shared_count
+{
+   public:
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<T>::type                         pointer;
+
+   private:
+   typedef sp_counted_impl_pd<VoidAllocator, Deleter>       counted_impl;
+
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<counted_impl>::type                         counted_impl_ptr;
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<sp_counted_base>::type                       counted_base_ptr;
+
+   typedef boost::container::allocator_traits<VoidAllocator>         vallocator_traits;
+
+   typedef typename vallocator_traits::template
+      portable_rebind_alloc<counted_impl>::type                      counted_impl_allocator;
+
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<const Deleter>::type                         const_deleter_pointer;
+
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<const VoidAllocator>::type                   const_allocator_pointer;
+
+   pointer           m_px;
+   counted_impl_ptr  m_pi;
+
+   template <class T2, class VoidAllocator2, class Deleter2>
+   friend class weak_count;
+
+   template <class T2, class VoidAllocator2, class Deleter2>
+   friend class shared_count;
+
+   public:
+
+   shared_count()
+      :  m_px(0), m_pi(0) // nothrow
+   {}
+
+   template <class Ptr>
+   shared_count(const shared_count &other_shared_count, const Ptr &p)
+      :  m_px(p), m_pi(other_shared_count.m_pi)
+   {}
+
+   template <class Ptr>
+   shared_count(const Ptr &p, const VoidAllocator &a, Deleter d)
+      :  m_px(p), m_pi(0)
+   {
+      BOOST_TRY{
+         if(p){
+            counted_impl_allocator alloc(a);
+            m_pi = alloc.allocate(1);
+            //Anti-exception deallocator
+            scoped_ptr<counted_impl,
+                     scoped_ptr_dealloc_functor<counted_impl_allocator> >
+                        deallocator(m_pi, alloc);
+            //It's more correct to use VoidAllocator::construct but
+            //this needs copy constructor and we don't like it
+            new(ipcdetail::to_raw_pointer(m_pi))counted_impl(p, a, d);
+            deallocator.release();
+         }
+      }
+      BOOST_CATCH (...){
+         d(p); // delete p
+         BOOST_RETHROW
+      }
+      BOOST_CATCH_END
+   }
+
+   ~shared_count() // nothrow
+   {
+      if(m_pi)
+         m_pi->release();
+   }
+
+   shared_count(shared_count const & r)
+      :  m_px(r.m_px), m_pi(r.m_pi) // nothrow
+   { if( m_pi != 0 ) m_pi->add_ref_copy(); }
+
+   //this is a test
+   template<class Y>
+   explicit shared_count(shared_count<Y, VoidAllocator, Deleter> const & r)
+      :  m_px(r.m_px), m_pi(r.m_pi) // nothrow
+   {  if( m_pi != 0 ) m_pi->add_ref_copy();  }
+
+   //this is a test
+   template<class Y>
+   explicit shared_count(const pointer & ptr, shared_count<Y, VoidAllocator, Deleter> const & r)
+      :  m_px(ptr), m_pi(r.m_pi) // nothrow
+   {  if( m_pi != 0 ) m_pi->add_ref_copy();  }
+
+/*
+   explicit shared_count(weak_count<Y, VoidAllocator, Deleter> const & r)
+      // throws bad_weak_ptr when r.use_count() == 0
+      : m_pi( r.m_pi )
+   {
+      if( m_pi == 0 || !m_pi->add_ref_lock() ){
+         boost::throw_exception( boost::interprocess::bad_weak_ptr() );
+      }
+   }
+*/
+   template<class Y>
+   explicit shared_count(weak_count<Y, VoidAllocator, Deleter> const & r)
+      // throws bad_weak_ptr when r.use_count() == 0
+      : m_px(r.m_px), m_pi( r.m_pi )
+   {
+      if( m_pi == 0 || !m_pi->add_ref_lock() ){
+         throw( boost::interprocess::bad_weak_ptr() );
+      }
+   }
+
+   const pointer &to_raw_pointer() const
+   {  return m_px;   }
+
+   pointer &to_raw_pointer()
+   {  return m_px;   }
+
+   shared_count & operator= (shared_count const & r) // nothrow
+   {
+      m_px = r.m_px;
+      counted_impl_ptr tmp = r.m_pi;
+      if( tmp != m_pi ){
+         if(tmp != 0)   tmp->add_ref_copy();
+         if(m_pi != 0)  m_pi->release();
+         m_pi = tmp;
+      }
+      return *this;
+   }
+
+   template<class Y>
+   shared_count & operator= (shared_count<Y, VoidAllocator, Deleter> const & r) // nothrow
+   {
+      m_px = r.m_px;
+      counted_impl_ptr tmp = r.m_pi;
+      if( tmp != m_pi ){
+         if(tmp != 0)   tmp->add_ref_copy();
+         if(m_pi != 0)  m_pi->release();
+         m_pi = tmp;
+      }
+      return *this;
+   }
+
+   void swap(shared_count & r) // nothrow
+   {  ipcdetail::do_swap(m_px, r.m_px);   ipcdetail::do_swap(m_pi, r.m_pi);   }
+
+   long use_count() const // nothrow
+   {  return m_pi != 0? m_pi->use_count(): 0;  }
+
+   bool unique() const // nothrow
+   {  return use_count() == 1;   }
+
+   const_deleter_pointer get_deleter() const
+   {  return m_pi ? m_pi->get_deleter() : 0; }
+
+//   const_allocator_pointer get_allocator() const
+//   {  return m_pi ? m_pi->get_allocator() : 0; }
+
+   template<class T2, class VoidAllocator2, class Deleter2>
+   bool internal_equal (shared_count<T2, VoidAllocator2, Deleter2> const & other) const
+   {  return this->m_pi == other.m_pi;   }
+
+   template<class T2, class VoidAllocator2, class Deleter2>
+   bool internal_less  (shared_count<T2, VoidAllocator2, Deleter2> const & other) const
+   {  return std::less<counted_base_ptr>()(this->m_pi, other.m_pi);  }
+};
+
+template<class T, class VoidAllocator, class Deleter, class T2, class VoidAllocator2, class Deleter2> inline
+bool operator==(shared_count<T, VoidAllocator, Deleter> const & a, shared_count<T2, VoidAllocator2, Deleter2> const & b)
+{  return a.internal_equal(b);  }
+
+template<class T, class VoidAllocator, class Deleter, class T2, class VoidAllocator2, class Deleter2> inline
+bool operator<(shared_count<T, VoidAllocator, Deleter> const & a, shared_count<T2, VoidAllocator2, Deleter2> const & b)
+{  return a.internal_less(b);   }
+
+
+template<class T, class VoidAllocator, class Deleter>
+class weak_count
+{
+   public:
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<T>::type                         pointer;
+
+   private:
+
+   typedef sp_counted_impl_pd<VoidAllocator, Deleter>                counted_impl;
+
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<counted_impl>::type                          counted_impl_ptr;
+   typedef typename boost::intrusive::
+      pointer_traits<typename VoidAllocator::pointer>::template
+         rebind_pointer<sp_counted_base>::type                       counted_base_ptr;
+
+   pointer           m_px;
+   counted_impl_ptr  m_pi;
+
+   template <class T2, class VoidAllocator2, class Deleter2>
+   friend class weak_count;
+
+   template <class T2, class VoidAllocator2, class Deleter2>
+   friend class shared_count;
+
+   public:
+
+   weak_count(): m_px(0), m_pi(0) // nothrow
+   {}
+
+   template <class Y>
+   explicit weak_count(shared_count<Y, VoidAllocator, Deleter> const & r)
+      :  m_px(r.m_px), m_pi(r.m_pi) // nothrow
+   {  if(m_pi != 0) m_pi->weak_add_ref(); }
+
+   weak_count(weak_count const & r)
+      :  m_px(r.m_px), m_pi(r.m_pi) // nothrow
+   {  if(m_pi != 0) m_pi->weak_add_ref(); }
+
+   template<class Y>
+   weak_count(weak_count<Y, VoidAllocator, Deleter> const & r)
+      : m_px(r.m_px), m_pi(r.m_pi) // nothrow
+   {  if(m_pi != 0) m_pi->weak_add_ref(); }
+
+   ~weak_count() // nothrow
+   {  if(m_pi != 0) m_pi->weak_release(); }
+
+   template<class Y>
+   weak_count & operator= (shared_count<Y, VoidAllocator, Deleter> const & r) // nothrow
+   {
+      m_px = r.m_px;
+      counted_impl_ptr tmp = r.m_pi;
+      if(tmp != 0)   tmp->weak_add_ref();
+      if(m_pi != 0)  m_pi->weak_release();
+      m_pi = tmp;
+      return *this;
+   }
+
+   weak_count & operator= (weak_count const & r) // nothrow
+   {
+      m_px = r.m_px;
+      counted_impl_ptr tmp = r.m_pi;
+      if(tmp != 0) tmp->weak_add_ref();
+      if(m_pi != 0) m_pi->weak_release();
+      m_pi = tmp;
+      return *this;
+   }
+
+   void set_pointer(const pointer &ptr)
+   {  m_px = ptr; }
+
+   template<class Y>
+   weak_count & operator= (weak_count<Y, VoidAllocator, Deleter> const& r) // nothrow
+   {
+      counted_impl_ptr tmp = r.m_pi;
+      if(tmp != 0) tmp->weak_add_ref();
+      if(m_pi != 0) m_pi->weak_release();
+      m_pi = tmp;
+      return *this;
+   }
+
+   void swap(weak_count & r) // nothrow
+   {  ipcdetail::do_swap(m_px, r.m_px);  ipcdetail::do_swap(m_pi, r.m_pi);   }
+
+   long use_count() const // nothrow
+   {  return m_pi != 0? m_pi->use_count() : 0;   }
+
+   template<class T2, class VoidAllocator2, class Deleter2>
+   bool internal_equal (weak_count<T2, VoidAllocator2, Deleter2> const & other) const
+   {  return this->m_pi == other.m_pi;   }
+
+   template<class T2, class VoidAllocator2, class Deleter2>
+   bool internal_less (weak_count<T2, VoidAllocator2, Deleter2> const & other) const
+   {  return std::less<counted_base_ptr>()(this->m_pi, other.m_pi);  }
+};
+
+template<class T, class VoidAllocator, class Deleter, class T2, class VoidAllocator2, class Deleter2> inline
+bool operator==(weak_count<T, VoidAllocator, Deleter> const & a, weak_count<T2, VoidAllocator2, Deleter2> const & b)
+{  return a.internal_equal(b);  }
+
+template<class T, class VoidAllocator, class Deleter, class T2, class VoidAllocator2, class Deleter2> inline
+bool operator<(weak_count<T, VoidAllocator, Deleter> const & a, weak_count<T2, VoidAllocator2, Deleter2> const & b)
+{  return a.internal_less(b);   }
+
+} // namespace ipcdetail
+} // namespace interprocess
+} // namespace boost
+
+
+#include <boost/interprocess/detail/config_end.hpp>
+
+
+#endif  // #ifndef BOOST_INTERPROCESS_DETAIL_SHARED_COUNT_HPP_INCLUDED