#ifndef BOOST_SMART_PTR_DETAIL_SHARED_COUNT_HPP_INCLUDED | |
#define BOOST_SMART_PTR_DETAIL_SHARED_COUNT_HPP_INCLUDED | |
// MS compatible compilers support #pragma once | |
#if defined(_MSC_VER) && (_MSC_VER >= 1020) | |
# pragma once | |
#endif | |
// | |
// detail/shared_count.hpp | |
// | |
// 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) | |
// | |
#ifdef __BORLANDC__ | |
# pragma warn -8027 // Functions containing try are not expanded inline | |
#endif | |
#include <boost/config.hpp> | |
#include <boost/checked_delete.hpp> | |
#include <boost/throw_exception.hpp> | |
#include <boost/smart_ptr/bad_weak_ptr.hpp> | |
#include <boost/smart_ptr/detail/sp_counted_base.hpp> | |
#include <boost/smart_ptr/detail/sp_counted_impl.hpp> | |
#include <boost/detail/workaround.hpp> | |
// In order to avoid circular dependencies with Boost.TR1 | |
// we make sure that our include of <memory> doesn't try to | |
// pull in the TR1 headers: that's why we use this header | |
// rather than including <memory> directly: | |
#include <boost/config/no_tr1/memory.hpp> // std::auto_ptr | |
#include <functional> // std::less | |
#include <new> // std::bad_alloc | |
namespace boost | |
{ | |
namespace detail | |
{ | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
int const shared_count_id = 0x2C35F101; | |
int const weak_count_id = 0x298C38A4; | |
#endif | |
struct sp_nothrow_tag {}; | |
class weak_count; | |
class shared_count | |
{ | |
private: | |
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 Y> explicit shared_count( Y * p ): pi_( 0 ) | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
#ifndef BOOST_NO_EXCEPTIONS | |
try | |
{ | |
pi_ = new sp_counted_impl_p<Y>( p ); | |
} | |
catch(...) | |
{ | |
boost::checked_delete( p ); | |
throw; | |
} | |
#else | |
pi_ = new sp_counted_impl_p<Y>( p ); | |
if( pi_ == 0 ) | |
{ | |
boost::checked_delete( p ); | |
boost::throw_exception( std::bad_alloc() ); | |
} | |
#endif | |
} | |
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 ) | |
template<class Y, class D> shared_count( Y * p, D d ): pi_(0) | |
#else | |
template<class P, class D> shared_count( P p, D d ): pi_(0) | |
#endif | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1200 ) | |
typedef Y* P; | |
#endif | |
#ifndef BOOST_NO_EXCEPTIONS | |
try | |
{ | |
pi_ = new sp_counted_impl_pd<P, D>(p, d); | |
} | |
catch(...) | |
{ | |
d(p); // delete p | |
throw; | |
} | |
#else | |
pi_ = new sp_counted_impl_pd<P, D>(p, d); | |
if(pi_ == 0) | |
{ | |
d(p); // delete p | |
boost::throw_exception(std::bad_alloc()); | |
} | |
#endif | |
} | |
template<class P, class D, class A> shared_count( P p, D d, A a ): pi_( 0 ) | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
typedef sp_counted_impl_pda<P, D, A> impl_type; | |
typedef typename A::template rebind< impl_type >::other A2; | |
A2 a2( a ); | |
#ifndef BOOST_NO_EXCEPTIONS | |
try | |
{ | |
pi_ = a2.allocate( 1, static_cast< impl_type* >( 0 ) ); | |
new( static_cast< void* >( pi_ ) ) impl_type( p, d, a ); | |
} | |
catch(...) | |
{ | |
d( p ); | |
if( pi_ != 0 ) | |
{ | |
a2.deallocate( static_cast< impl_type* >( pi_ ), 1 ); | |
} | |
throw; | |
} | |
#else | |
pi_ = a2.allocate( 1, static_cast< impl_type* >( 0 ) ); | |
if( pi_ != 0 ) | |
{ | |
new( static_cast< void* >( pi_ ) ) impl_type( p, d, a ); | |
} | |
else | |
{ | |
d( p ); | |
boost::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_impl_p<Y>( r.get() ) ) | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
#ifdef BOOST_NO_EXCEPTIONS | |
if( pi_ == 0 ) | |
{ | |
boost::throw_exception(std::bad_alloc()); | |
} | |
#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(); | |
} | |
#if defined( BOOST_HAS_RVALUE_REFS ) | |
shared_count(shared_count && r): pi_(r.pi_) // nothrow | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
r.pi_ = 0; | |
} | |
#endif | |
explicit shared_count(weak_count const & r); // throws bad_weak_ptr when r.use_count() == 0 | |
shared_count( weak_count const & r, sp_nothrow_tag ); // constructs an empty *this 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; | |
} | |
bool empty() const // nothrow | |
{ | |
return pi_ == 0; | |
} | |
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( sp_typeinfo const & ti ) const | |
{ | |
return pi_? pi_->get_deleter( ti ): 0; | |
} | |
}; | |
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_(weak_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_(weak_count_id) | |
#endif | |
{ | |
if(pi_ != 0) pi_->weak_add_ref(); | |
} | |
// Move support | |
#if defined( BOOST_HAS_RVALUE_REFS ) | |
weak_count(weak_count && r): pi_(r.pi_) // nothrow | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(weak_count_id) | |
#endif | |
{ | |
r.pi_ = 0; | |
} | |
#endif | |
~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 != 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 != 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; | |
} | |
bool empty() const // nothrow | |
{ | |
return pi_ == 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() ) | |
{ | |
boost::throw_exception( boost::bad_weak_ptr() ); | |
} | |
} | |
inline shared_count::shared_count( weak_count const & r, sp_nothrow_tag ): pi_( r.pi_ ) | |
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS) | |
, id_(shared_count_id) | |
#endif | |
{ | |
if( pi_ != 0 && !pi_->add_ref_lock() ) | |
{ | |
pi_ = 0; | |
} | |
} | |
} // namespace detail | |
} // namespace boost | |
#ifdef __BORLANDC__ | |
# pragma warn .8027 // Functions containing try are not expanded inline | |
#endif | |
#endif // #ifndef BOOST_SMART_PTR_DETAIL_SHARED_COUNT_HPP_INCLUDED |