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 #ifndef BOOST_DETAIL_SHARED_COUNT_132_HPP_INCLUDED
 #define BOOST_DETAIL_SHARED_COUNT_132_HPP_INCLUDED
 
 // MS compatible compilers support #pragma once
 
 #if defined(_MSC_VER)
 # pragma once
 #endif
 
 //
 //  detail/shared_count.hpp
 //
 //  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
 //
 // 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)
 //
 
 #include <boost/config.hpp>
 
 #if defined(BOOST_SP_USE_STD_ALLOCATOR) && defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 # error BOOST_SP_USE_STD_ALLOCATOR and BOOST_SP_USE_QUICK_ALLOCATOR are incompatible.
 #endif
 
 #include <boost/checked_delete.hpp>
 #include <boost/serialization/throw_exception.hpp>
 #include <boost/detail/lightweight_mutex.hpp>
 
 #if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 #include <boost/detail/quick_allocator.hpp>
 #endif
 
 #include <memory>           // std::auto_ptr, std::allocator
 #include <functional>       // std::less
 #include <exception>        // std::exception
 #include <new>              // std::bad_alloc
 #include <typeinfo>         // std::type_info in get_deleter
 #include <cstddef>          // std::size_t
 
 #include <boost/config.hpp> // msvc 6.0 needs this for warning suppression
 #if defined(BOOST_NO_STDC_NAMESPACE)
 namespace std{
     using ::size_t;
 } // namespace std
 #endif
 
 namespace boost_132 {
 
 // Debug hooks
 
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
 
 void sp_scalar_constructor_hook(void * px, std::size_t size, void * pn);
 void sp_array_constructor_hook(void * px);
 void sp_scalar_destructor_hook(void * px, std::size_t size, void * pn);
 void sp_array_destructor_hook(void * px);
 
 #endif
 
 
 // The standard library that comes with Borland C++ 5.5.1
 // defines std::exception and its members as having C calling
 // convention (-pc). When the definition of bad_weak_ptr
 // is compiled with -ps, the compiler issues an error.
 // Hence, the temporary #pragma option -pc below. The version
 // check is deliberately conservative.
 
 class bad_weak_ptr: public std::exception
 {
 public:
 
     virtual char const * what() const BOOST_NOEXCEPT_OR_NOTHROW
     {
         return "boost::bad_weak_ptr";
     }
 };
 
 namespace detail{
 
 class sp_counted_base
 {
 //private:
 
     typedef boost::detail::lightweight_mutex mutex_type;
 
 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
 
     // destruct() is called when weak_count_ drops to zero.
 
     virtual void destruct() // nothrow
     {
         delete this;
     }
 
     virtual void * get_deleter(std::type_info const & ti) = 0;
 
     void add_ref_copy()
     {
 #if defined(BOOST_HAS_THREADS)
         mutex_type::scoped_lock lock(mtx_);
 #endif
         ++use_count_;
     }
 
     void add_ref_lock()
     {
 #if defined(BOOST_HAS_THREADS)
         mutex_type::scoped_lock lock(mtx_);
 #endif
         if(use_count_ == 0) boost::serialization::throw_exception(bad_weak_ptr());
         ++use_count_;
     }
 
     void release() // nothrow
     {
         {
 #if defined(BOOST_HAS_THREADS)
             mutex_type::scoped_lock lock(mtx_);
 #endif
             long new_use_count = --use_count_;
 
             if(new_use_count != 0) return;
         }
 
         dispose();
         weak_release();
     }
 
     void weak_add_ref() // nothrow
     {
 #if defined(BOOST_HAS_THREADS)
         mutex_type::scoped_lock lock(mtx_);
 #endif
         ++weak_count_;
     }
 
     void weak_release() // nothrow
     {
         long new_weak_count;
 
         {
 #if defined(BOOST_HAS_THREADS)
             mutex_type::scoped_lock lock(mtx_);
 #endif
             new_weak_count = --weak_count_;
         }
 
         if(new_weak_count == 0)
         {
             destruct();
         }
     }
 
     long use_count() const // nothrow
     {
 #if defined(BOOST_HAS_THREADS)
         mutex_type::scoped_lock lock(mtx_);
 #endif
         return use_count_;
     }
 
 //private:
 public:
     sp_counted_base(sp_counted_base const &);
     sp_counted_base & operator= (sp_counted_base const &);
 
     long use_count_;        // #shared
     long weak_count_;       // #weak + (#shared != 0)
 
 #if defined(BOOST_HAS_THREADS) || defined(BOOST_LWM_WIN32)
     mutable mutex_type mtx_;
 #endif
 };
 
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
 
 template<class T> void cbi_call_constructor_hook(sp_counted_base * pn, T * px, boost::checked_deleter< T > const &)
 {
     boost::sp_scalar_constructor_hook(px, sizeof(T), pn);
 }
 
 template<class T> void cbi_call_constructor_hook(sp_counted_base *, T * px, boost::checked_array_deleter< T > const &)
 {
     boost::sp_array_constructor_hook(px);
 }
 
 template<class P, class D> void cbi_call_constructor_hook(sp_counted_base *, P const &, D const &, long)
 {
 }
 
 template<class T> void cbi_call_destructor_hook(sp_counted_base * pn, T * px, boost::checked_deleter< T > const &)
 {
     boost::sp_scalar_destructor_hook(px, sizeof(T), pn);
 }
 
 template<class T> void cbi_call_destructor_hook(sp_counted_base *, T * px, boost::checked_array_deleter< T > const &)
 {
     boost::sp_array_destructor_hook(px);
 }
 
 template<class P, class D> void cbi_call_destructor_hook(sp_counted_base *, P const &, D const &, long)
 {
 }
 
 #endif
 
 //
 // Borland's Codeguard trips up over the -Vx- option here:
 //
 #ifdef __CODEGUARD__
 # pragma option push -Vx-
 #endif
 
 template<class P, class D> class sp_counted_base_impl: public sp_counted_base
 {
 //private:
 public:
     P ptr; // copy constructor must not throw
     D del; // copy constructor must not throw
 
     sp_counted_base_impl(sp_counted_base_impl const &);
     sp_counted_base_impl & operator= (sp_counted_base_impl const &);
 
     typedef sp_counted_base_impl<P, D> this_type;
 
 public:
 
     // pre: initial_use_count <= initial_weak_count, d(p) must not throw
 
     sp_counted_base_impl(P p, D d): ptr(p), del(d)
     {
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         detail::cbi_call_constructor_hook(this, p, d, 0);
 #endif
     }
 
     virtual void dispose() // nothrow
     {
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         detail::cbi_call_destructor_hook(this, ptr, del, 0);
 #endif
         del(ptr);
     }
 
     virtual void * get_deleter(std::type_info const & ti)
     {
         return ti == typeid(D)? &del: 0;
     }
 
 #if defined(BOOST_SP_USE_STD_ALLOCATOR)
 
     void * operator new(std::size_t)
     {
         return std::allocator<this_type>().allocate(1, static_cast<this_type *>(0));
     }
 
     void operator delete(void * p)
     {
         std::allocator<this_type>().deallocate(static_cast<this_type *>(p), 1);
     }
 
 #endif
 
 #if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 
     void * operator new(std::size_t)
     {
         return boost::detail::quick_allocator<this_type>::alloc();
     }
 
     void operator delete(void * p)
     {
         boost::detail::quick_allocator<this_type>::dealloc(p);
     }
 
 #endif
 };
 
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
 
 int const shared_count_id = 0x2C35F101;
 int const   weak_count_id = 0x298C38A4;
 
 #endif
 
 class weak_count;
 
 class shared_count
 {
 //private:
 public:
     sp_counted_base * pi_;
 
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
     int id_;
 #endif
 
     friend class weak_count;
 
 public:
 
     shared_count(): pi_(0) // nothrow
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
     }
 
     template<class P, class D> shared_count(P p, D d): pi_(0)
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
 #ifndef BOOST_NO_EXCEPTIONS
 
         try
         {
             pi_ = new sp_counted_base_impl<P, D>(p, d);
         }
         catch(...)
         {
             d(p); // delete p
             throw;
         }
 
 #else
 
         pi_ = new sp_counted_base_impl<P, D>(p, d);
 
         if(pi_ == 0)
         {
             d(p); // delete p
             boost::serialization::throw_exception(std::bad_alloc());
         }
 
 #endif
     }
 
 #ifndef BOOST_NO_AUTO_PTR
 
     // auto_ptr<Y> is special cased to provide the strong guarantee
 
     template<class Y>
     explicit shared_count(std::auto_ptr<Y> & r): pi_(
         new sp_counted_base_impl<
             Y *,
             boost::checked_deleter<Y>
         >(r.get(), boost::checked_deleter<Y>()))
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
         r.release();
     }
 
 #endif
 
     ~shared_count() // nothrow
     {
         if(pi_ != 0) pi_->release();
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         id_ = 0;
 #endif
     }
 
     shared_count(shared_count const & r): pi_(r.pi_) // nothrow
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
         if(pi_ != 0) pi_->add_ref_copy();
     }
 
     explicit shared_count(weak_count const & r); // throws bad_weak_ptr when r.use_count() == 0
 
     shared_count & operator= (shared_count const & r) // nothrow
     {
         sp_counted_base * tmp = r.pi_;
 
         if(tmp != pi_)
         {
             if(tmp != 0) tmp->add_ref_copy();
             if(pi_ != 0) pi_->release();
             pi_ = tmp;
         }
 
         return *this;
     }
 
     void swap(shared_count & r) // nothrow
     {
         sp_counted_base * tmp = r.pi_;
         r.pi_ = pi_;
         pi_ = tmp;
     }
 
     long use_count() const // nothrow
     {
         return pi_ != 0? pi_->use_count(): 0;
     }
 
     bool unique() const // nothrow
     {
         return use_count() == 1;
     }
 
     friend inline bool operator==(shared_count const & a, shared_count const & b)
     {
         return a.pi_ == b.pi_;
     }
 
     friend inline bool operator<(shared_count const & a, shared_count const & b)
     {
         return std::less<sp_counted_base *>()(a.pi_, b.pi_);
     }
 
     void * get_deleter(std::type_info const & ti) const
     {
         return pi_? pi_->get_deleter(ti): 0;
     }
 };
 
 #ifdef __CODEGUARD__
 # pragma option pop
 #endif
 
 
 class weak_count
 {
 private:
 
     sp_counted_base * pi_;
 
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
     int id_;
 #endif
 
     friend class shared_count;
 
 public:
 
     weak_count(): pi_(0) // nothrow
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(weak_count_id)
 #endif
     {
     }
 
     weak_count(shared_count const & r): pi_(r.pi_) // nothrow
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
         if(pi_ != 0) pi_->weak_add_ref();
     }
 
     weak_count(weak_count const & r): pi_(r.pi_) // nothrow
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
     {
         if(pi_ != 0) pi_->weak_add_ref();
     }
 
     ~weak_count() // nothrow
     {
         if(pi_ != 0) pi_->weak_release();
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         id_ = 0;
 #endif
     }
 
     weak_count & operator= (shared_count const & r) // nothrow
     {
         sp_counted_base * tmp = r.pi_;
         if(tmp != 0) tmp->weak_add_ref();
         if(pi_ != 0) pi_->weak_release();
         pi_ = tmp;
 
         return *this;
     }
 
     weak_count & operator= (weak_count const & r) // nothrow
     {
         sp_counted_base * tmp = r.pi_;
         if(tmp != 0) tmp->weak_add_ref();
         if(pi_ != 0) pi_->weak_release();
         pi_ = tmp;
 
         return *this;
     }
 
     void swap(weak_count & r) // nothrow
     {
         sp_counted_base * tmp = r.pi_;
         r.pi_ = pi_;
         pi_ = tmp;
     }
 
     long use_count() const // nothrow
     {
         return pi_ != 0? pi_->use_count(): 0;
     }
 
     friend inline bool operator==(weak_count const & a, weak_count const & b)
     {
         return a.pi_ == b.pi_;
     }
 
     friend inline bool operator<(weak_count const & a, weak_count const & b)
     {
         return std::less<sp_counted_base *>()(a.pi_, b.pi_);
     }
 };
 
 inline shared_count::shared_count(weak_count const & r): pi_(r.pi_)
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         , id_(shared_count_id)
 #endif
 {
     if(pi_ != 0)
     {
         pi_->add_ref_lock();
     }
     else
     {
         boost::serialization::throw_exception(bad_weak_ptr());
     }
 }
 
 } // namespace detail
 
 } // namespace boost
 
 BOOST_SERIALIZATION_ASSUME_ABSTRACT(boost_132::detail::sp_counted_base)
 
 #endif  // #ifndef BOOST_DETAIL_SHARED_COUNT_HPP_INCLUDED

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