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Diffstat (limited to 'libstdc++-v3/include/tr1/boost_sp_shared_count.h')
| -rw-r--r-- | libstdc++-v3/include/tr1/boost_sp_shared_count.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/libstdc++-v3/include/tr1/boost_sp_shared_count.h b/libstdc++-v3/include/tr1/boost_sp_shared_count.h new file mode 100644 index 00000000000..a2de21f4439 --- /dev/null +++ b/libstdc++-v3/include/tr1/boost_sp_shared_count.h @@ -0,0 +1,214 @@ +// <tr1/boost_sp_shared_count.h> -*- C++ -*- + +// Copyright (C) 2007 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 2, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING. If not, write to the Free +// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, +// USA. + +// As a special exception, you may use this file as part of a free software +// library without restriction. Specifically, if other files instantiate +// templates or use macros or inline functions from this file, or you compile +// this file and link it with other files to produce an executable, this +// file does not by itself cause the resulting executable to be covered by +// the GNU General Public License. This exception does not however +// invalidate any other reasons why the executable file might be covered by +// the GNU General Public License. + +// shared_count.hpp +// Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd. + +// shared_ptr.hpp +// Copyright (C) 1998, 1999 Greg Colvin and Beman Dawes. +// Copyright (C) 2001, 2002, 2003 Peter Dimov + +// weak_ptr.hpp +// Copyright (C) 2001, 2002, 2003 Peter Dimov + +// enable_shared_from_this.hpp +// Copyright (C) 2002 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) + +// GCC Note: based on version 1.32.0 of the Boost library. + +/** @file tr1/boost_sp_shared_count.h + * This is an internal header file, included by other library headers. + * You should not attempt to use it directly. + */ + +#if defined(_GLIBCXX_INCLUDE_AS_CXX0X) +# error TR1 header cannot be included from C++0x header +#endif + +namespace std +{ +namespace tr1 +{ + + template<typename _Ptr, typename _Deleter, _Lock_policy _Lp> + class _Sp_counted_base_impl + : public _Sp_counted_base<_Lp> + { + public: + /** + * @brief + * @pre __d(__p) must not throw. + */ + _Sp_counted_base_impl(_Ptr __p, _Deleter __d) + : _M_ptr(__p), _M_del(__d) { } + + virtual void + _M_dispose() // nothrow + { _M_del(_M_ptr); } + + virtual void* + _M_get_deleter(const std::type_info& __ti) + { return __ti == typeid(_Deleter) ? &_M_del : 0; } + + private: + _Sp_counted_base_impl(const _Sp_counted_base_impl&); + _Sp_counted_base_impl& operator=(const _Sp_counted_base_impl&); + + _Ptr _M_ptr; // copy constructor must not throw + _Deleter _M_del; // copy constructor must not throw + }; + + template<_Lock_policy _Lp = __default_lock_policy> + class __weak_count; + + template<typename _Tp> + struct _Sp_deleter + { + typedef void result_type; + typedef _Tp* argument_type; + void operator()(_Tp* __p) const { delete __p; } + }; + + template<_Lock_policy _Lp = __default_lock_policy> + class __shared_count + { + public: + __shared_count() + : _M_pi(0) // nothrow + { } + + template<typename _Ptr> + __shared_count(_Ptr __p) : _M_pi(0) + { + try + { + typedef typename std::tr1::remove_pointer<_Ptr>::type _Tp; + _M_pi = new _Sp_counted_base_impl<_Ptr, _Sp_deleter<_Tp>, _Lp>( + __p, _Sp_deleter<_Tp>()); + } + catch(...) + { + delete __p; + __throw_exception_again; + } + } + + template<typename _Ptr, typename _Deleter> + __shared_count(_Ptr __p, _Deleter __d) : _M_pi(0) + { + try + { + _M_pi = new _Sp_counted_base_impl<_Ptr, _Deleter, _Lp>(__p, __d); + } + catch(...) + { + __d(__p); // Call _Deleter on __p. + __throw_exception_again; + } + } + + // Special case for auto_ptr<_Tp> to provide the strong guarantee. + template<typename _Tp> + explicit + __shared_count(std::auto_ptr<_Tp>& __r) + : _M_pi(new _Sp_counted_base_impl<_Tp*, + _Sp_deleter<_Tp>, _Lp >(__r.get(), _Sp_deleter<_Tp>())) + { __r.release(); } + + // Throw bad_weak_ptr when __r._M_get_use_count() == 0. + explicit + __shared_count(const __weak_count<_Lp>& __r); + + ~__shared_count() // nothrow + { + if (_M_pi != 0) + _M_pi->_M_release(); + } + + __shared_count(const __shared_count& __r) + : _M_pi(__r._M_pi) // nothrow + { + if (_M_pi != 0) + _M_pi->_M_add_ref_copy(); + } + + __shared_count& + operator=(const __shared_count& __r) // nothrow + { + _Sp_counted_base<_Lp>* __tmp = __r._M_pi; + if (__tmp != _M_pi) + { + if (__tmp != 0) + __tmp->_M_add_ref_copy(); + if (_M_pi != 0) + _M_pi->_M_release(); + _M_pi = __tmp; + } + return *this; + } + + void + _M_swap(__shared_count& __r) // nothrow + { + _Sp_counted_base<_Lp>* __tmp = __r._M_pi; + __r._M_pi = _M_pi; + _M_pi = __tmp; + } + + long + _M_get_use_count() const // nothrow + { return _M_pi != 0 ? _M_pi->_M_get_use_count() : 0; } + + bool + _M_unique() const // nothrow + { return this->_M_get_use_count() == 1; } + + friend inline bool + operator==(const __shared_count& __a, const __shared_count& __b) + { return __a._M_pi == __b._M_pi; } + + friend inline bool + operator<(const __shared_count& __a, const __shared_count& __b) + { return std::less<_Sp_counted_base<_Lp>*>()(__a._M_pi, __b._M_pi); } + + void* + _M_get_deleter(const std::type_info& __ti) const + { return _M_pi ? _M_pi->_M_get_deleter(__ti) : 0; } + + private: + friend class __weak_count<_Lp>; + + _Sp_counted_base<_Lp>* _M_pi; + }; +} +} |