first commit
This commit is contained in:
Jose Caban
611
extern/stdcxx/4.2.1/include/tr1/_smartptr.h
vendored
Normal file
611
extern/stdcxx/4.2.1/include/tr1/_smartptr.h
vendored
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@@ -0,0 +1,611 @@
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// -*- C++ -*-
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/***************************************************************************
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*
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* _smartptr.h - definition of class template shared_ptr and weak_ptr
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*
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* $Id: _smartptr.h 590052 2007-10-30 12:44:14Z faridz $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 2005-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#ifndef _RWSTD_TR1_SMARTPTR_INCLUDED
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#define _RWSTD_TR1_SMARTPTR_INCLUDED
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#include <rw/_autoptr.h>
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#include <rw/_exception.h>
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#include <rw/_mutex.h>
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#include <rw/_defs.h>
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_RWSTD_NAMESPACE (__rw) {
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struct __rw_ptr_base
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{
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__rw_ptr_base ()
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: _C_ref (1), _C_weak_ref (0) { }
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virtual ~__rw_ptr_base () {
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#ifdef _RWSTDDEBUG
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_C_ref = 0xdeadbeefL;
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_C_weak_ref = 0xdeadbeefL;
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#endif // _RWSTDDEBUG
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}
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virtual void* _C_get_deleter () const {
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return 0;
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}
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long _C_get_ref () {
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_RWSTD_ATOMIC_PREINCREMENT (_C_ref, false);
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return _RWSTD_ATOMIC_PREDECREMENT (_C_ref, false);
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}
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void _C_inc_ref () {
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_RWSTD_ATOMIC_PREINCREMENT (_C_ref, false);
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}
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void _C_inc_ref_weak () {
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_RWSTD_ATOMIC_PREINCREMENT (_C_weak_ref, false);
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}
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void _C_unref () {
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const long __ref = _RWSTD_ATOMIC_PREDECREMENT (_C_ref, false);
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if (0 == __ref)
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_C_delete ();
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if (__ref <= 0) {
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if (0 > _RWSTD_ATOMIC_PREDECREMENT (_C_weak_ref, false))
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delete this;
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else
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_RWSTD_ATOMIC_PREINCREMENT (_C_weak_ref, false);
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}
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}
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void _C_unref_weak () {
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if (0 >= _RWSTD_ATOMIC_PREDECREMENT (_C_weak_ref, false)) {
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if (0 > _RWSTD_ATOMIC_PREDECREMENT (_C_ref, false))
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delete this;
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else
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_RWSTD_ATOMIC_PREINCREMENT (_C_ref, false);
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}
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}
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private:
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virtual void _C_delete () = 0;
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long _C_ref;
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long _C_weak_ref;
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};
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template <class _TypeU>
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struct __rw_ptr_body: __rw_ptr_base
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{
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__rw_ptr_body (_TypeU *__ptr)
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: __rw_ptr_base (), _C_ptr (__ptr) { }
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protected:
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_TypeU* const _C_ptr;
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private:
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virtual void _C_delete () {
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delete _C_ptr;
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}
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};
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template <class _TypeU, class _Deleter>
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struct __rw_ptr_deleter: __rw_ptr_body<_TypeU>
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{
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__rw_ptr_deleter (_TypeU *__ptr, const _Deleter &__del)
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: __rw_ptr_body<_TypeU>(__ptr), _C_del (__del) { }
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private:
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virtual void _C_delete () {
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_C_del (this->_C_ptr);
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}
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virtual void* _C_get_deleter () const {
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return _RWSTD_CONST_CAST (_Deleter*, &_C_del);
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}
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_Deleter _C_del;
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};
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} // namespace __rw
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_RWSTD_NAMESPACE (std) {
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_RWSTD_NAMESPACE (tr1) {
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// 2.2.2 - class bad_weak_ptr
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struct bad_weak_ptr: _RW::__rw_exception
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{
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bad_weak_ptr (): _RW::__rw_exception () { }
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};
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template <class _TypeT>
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class weak_ptr;
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// 2.2.3 - class template shared_ptr
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template <class _TypeT>
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class shared_ptr
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{
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// declare every specialization a friend and grant
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// template members access to _C_ptr
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template <class _TypeU>
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friend class shared_ptr;
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template <class _TypeU>
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friend class weak_ptr;
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template <class _TypeU, class _TypeV>
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friend shared_ptr<_TypeU>
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dynamic_pointer_cast (const shared_ptr<_TypeV>&);
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typedef _RW::__rw_ptr_base _C_base;
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_C_base *_C_pbody;
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_TypeT *_C_ptr;
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template <class _TypeU>
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_EXPLICIT
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shared_ptr (const shared_ptr<_TypeU> &__rhs, const _TypeT*)
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: _C_pbody (__rhs._C_pbody) {
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if (_C_pbody)
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_C_pbody->_C_inc_ref ();
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}
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public:
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typedef _TypeT element_type;
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// [2.2.3.1] constructors
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shared_ptr (): _C_pbody (0), _C_ptr (0) { }
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template <class _TypeU>
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_EXPLICIT
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shared_ptr (_TypeU *__ptr)
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: _C_pbody (__ptr ? new _RW::__rw_ptr_body<_TypeU>(__ptr) : 0),
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_C_ptr (__ptr) { /* empty */ }
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template <class _TypeU, class _Deleter>
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shared_ptr (_TypeU *__ptr, _Deleter __del)
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: _C_pbody (new _RW::__rw_ptr_deleter<_TypeU, _Deleter>(__ptr, __del)),
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_C_ptr (__ptr) { /* empty */ }
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shared_ptr (const shared_ptr &__rhs)
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: _C_pbody (__rhs._C_pbody), _C_ptr (__rhs._C_ptr) {
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if (_C_pbody)
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_C_pbody->_C_inc_ref ();
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}
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template <class _TypeU>
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shared_ptr (const shared_ptr<_TypeU> &__rhs)
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: _C_pbody (__rhs._C_pbody), _C_ptr (__rhs._C_ptr) {
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if (_C_pbody)
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_C_pbody->_C_inc_ref ();
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}
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template <class _TypeU>
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_EXPLICIT
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shared_ptr (const weak_ptr<_TypeU> &__rhs)
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: _C_pbody (__rhs._C_pbody), _C_ptr (__rhs._C_ptr) {
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if (_C_pbody) {
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if (0 >= _C_pbody->_C_get_ref ())
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throw bad_weak_ptr ();
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_C_pbody->_C_inc_ref ();
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}
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}
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template <class _TypeU>
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_EXPLICIT
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shared_ptr (auto_ptr<_TypeU>&);
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// [2.2.3.2] destructor
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~shared_ptr () {
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if (_C_pbody)
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_C_pbody->_C_unref ();
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#ifdef _RWSTDDEBUG
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_C_pbody = (_C_base*)0xdeadbeefL;
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_C_ptr = (element_type*)0xdeadbeefL;
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#endif // _RWSTDDEBUG
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}
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// [2.2.3.3] assignment
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shared_ptr& operator= (const shared_ptr &__rhs) {
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if (__rhs._C_pbody)
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__rhs._C_pbody->_C_inc_ref ();
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if (_C_pbody)
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_C_pbody->_C_unref ();
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_C_pbody = __rhs._C_pbody;
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_C_ptr = __rhs._C_ptr;
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return *this;
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}
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template <class _TypeU>
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shared_ptr& operator= (const shared_ptr<_TypeU> &__rhs) {
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_C_is_convertible ((_TypeU*)0);
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if (__rhs._C_pbody)
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__rhs._C_pbody->_C_inc_ref ();
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if (_C_pbody)
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_C_pbody->_C_unref ();
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_C_pbody = __rhs._C_pbody;
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_C_ptr = __rhs._C_ptr;
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return *this;
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}
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template <class _TypeU>
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shared_ptr& operator= (auto_ptr<_TypeU> &__rhs) {
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_RW::__rw_ptr_body<_TypeU>* const __tmp =
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new _RW::__rw_ptr_body<_TypeU>(__rhs.get ());
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if (_C_pbody)
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_C_pbody->_C_unref ();
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_C_pbody = __tmp;
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_C_ptr = __rhs.release ();
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return *this;
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}
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// [2.2.3.4] modifiers
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void swap (shared_ptr &__other) {
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_C_base* const __body = _C_pbody;
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element_type* const __ptr = _C_ptr;
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_C_pbody = __other._C_pbody;
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_C_ptr = __other._C_ptr;
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__other._C_pbody = __body;
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__other._C_ptr = __ptr;
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}
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void reset () {
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if (_C_pbody) {
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_C_pbody->_C_unref ();
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_C_pbody = 0;
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_C_ptr = 0;
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}
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}
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template <class _TypeU>
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void reset (_TypeU *__ptr) {
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shared_ptr<_TypeU>(__ptr).swap (*this);
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}
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template <class _TypeU, class _Deleter>
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void reset (_TypeU *__ptr, _Deleter __del) {
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shared_ptr<_TypeU>(__ptr, __del).swap (*this);
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}
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// [2.2.3.5] observers
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element_type* get () const {
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return _C_ptr;
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}
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_TYPENAME _RW::__rw_nonvoid_ref<element_type>::_C_ref
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operator*() const {
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_RWSTD_ASSERT (0 != get ());
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return *get ();
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}
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||||
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element_type* operator->() const {
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return &**this;
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}
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long use_count () const {
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return _C_pbody ? _C_pbody->_C_get_ref () : 0;
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}
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bool unique () const {
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return 1 == use_count ();
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}
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operator bool () const {
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return 0 != get ();
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}
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template <class _Deleter>
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_Deleter* _C_get_deleter () const {
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return _RWSTD_STATIC_CAST (_Deleter*,
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_C_pbody ? _C_pbody->_C_get_deleter () : 0);
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}
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template <class _TypeU>
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bool _C_less (const shared_ptr<_TypeU> &__rhs) const {
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return _C_pbody < __rhs._C_pbody;
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}
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private:
|
||||
|
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// helper to check whether one pointer is convertible to another
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// and to enforce the convertibility requirements
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static void _C_is_convertible (element_type*) { }
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};
|
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// 2.2.3.6 - shared_ptr comparisons
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template <class _TypeT, class _TypeU>
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inline bool
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operator== (const shared_ptr<_TypeT> &__lhs, const shared_ptr<_TypeU> &__rhs)
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{
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return __lhs.get () == __rhs.get ();
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}
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||||
|
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|
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template <class _TypeT, class _TypeU>
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inline bool
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operator!= (const shared_ptr<_TypeT> &__lhs, const shared_ptr<_TypeU> &__rhs)
|
||||
{
|
||||
return __lhs.get () != __rhs.get ();
|
||||
}
|
||||
|
||||
|
||||
template <class _TypeT, class _TypeU>
|
||||
inline bool
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operator< (const shared_ptr<_TypeT> &__lhs, const shared_ptr<_TypeU> &__rhs)
|
||||
{
|
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return __lhs._C_less (__rhs);
|
||||
}
|
||||
|
||||
|
||||
// 2.2.3.8 - shared_ptr specialized algorithms
|
||||
template <class _TypeT>
|
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inline void
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swap (shared_ptr<_TypeT> &__lhs, shared_ptr<_TypeT> &__rhs)
|
||||
{
|
||||
__lhs.swap (__rhs);
|
||||
}
|
||||
|
||||
|
||||
// 2.2.3.9 - shared_ptr casts
|
||||
template <class _TypeT, class _TypeU>
|
||||
inline shared_ptr<_TypeT>
|
||||
static_pointer_cast (const shared_ptr<_TypeU> &__src)
|
||||
{
|
||||
_TypeT* const __ptr = _RWSTD_STATIC_CAST (_TypeT*, __src.get ());
|
||||
if (__ptr)
|
||||
return shared_ptr<_TypeT>(__src, __ptr);
|
||||
|
||||
return shared_ptr<_TypeT>();
|
||||
}
|
||||
|
||||
|
||||
template <class _TypeT, class _TypeU>
|
||||
inline shared_ptr<_TypeT>
|
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dynamic_pointer_cast (const shared_ptr<_TypeU> &__src)
|
||||
{
|
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_TypeT* const __ptr = _RWSTD_DYNAMIC_CAST (_TypeT*, __src.get ());
|
||||
if (__ptr)
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||||
return shared_ptr<_TypeT>(__src, __ptr);
|
||||
|
||||
return shared_ptr<_TypeT>();
|
||||
}
|
||||
|
||||
|
||||
template <class _TypeT, class _TypeU>
|
||||
inline shared_ptr<_TypeT>
|
||||
const_pointer_cast (const shared_ptr<_TypeU> &__src)
|
||||
{
|
||||
_TypeT* const __ptr = _RWSTD_CONST_CAST (_TypeT*, __src.get ());
|
||||
if (__ptr)
|
||||
return shared_ptr<_TypeT>(__src, __ptr);
|
||||
|
||||
return shared_ptr<_TypeT>();
|
||||
}
|
||||
|
||||
|
||||
#if 0 // NOT IMPLEMENTED YET
|
||||
|
||||
// 2.2.3.7 - shared_ptr I/O
|
||||
template <class _CharT, class _Traits, class _TypeT>
|
||||
inline basic_ostream<_CharT, _TypeT>&
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||||
operator<< (basic_ostream<_CharT, _Traits>&, const shared_ptr<_TypeT>&);
|
||||
|
||||
#endif // 0/1
|
||||
|
||||
|
||||
// 2.2.3.10 - shared_ptr get_deleter
|
||||
template <class _Deleter, class _TypeT>
|
||||
_Deleter*
|
||||
get_deleter (const shared_ptr<_TypeT> &__ptr)
|
||||
{
|
||||
return __ptr._C_get_deleter ();
|
||||
}
|
||||
|
||||
|
||||
// 2.2.4 - class template weak_ptr
|
||||
template <class _TypeT>
|
||||
class weak_ptr
|
||||
{
|
||||
// declare every specialization a friend and grant
|
||||
// template members access to _C_pbody
|
||||
template <class _TypeU>
|
||||
friend class weak_ptr;
|
||||
|
||||
template <class _TypeU>
|
||||
friend class shared_ptr;
|
||||
|
||||
typedef _RW::__rw_ptr_base _C_base;
|
||||
|
||||
_C_base *_C_pbody;
|
||||
_TypeT *_C_ptr;
|
||||
|
||||
public:
|
||||
|
||||
typedef _TypeT element_type;
|
||||
|
||||
// constructors
|
||||
weak_ptr (): _C_pbody (0), _C_ptr (0) { }
|
||||
|
||||
template <class _TypeU>
|
||||
weak_ptr (const shared_ptr<_TypeU> &__ptr)
|
||||
: _C_pbody (__ptr._C_pbody), _C_ptr (__ptr._C_ptr) {
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
}
|
||||
|
||||
weak_ptr (const weak_ptr &__rhs)
|
||||
: _C_pbody (__rhs._C_pbody), _C_ptr (__rhs._C_ptr) {
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
}
|
||||
|
||||
template <class _TypeU>
|
||||
weak_ptr (const weak_ptr<_TypeU> &__rhs)
|
||||
: _C_pbody (__rhs._C_pbody), _C_ptr (__rhs._C_ptr) {
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
}
|
||||
|
||||
// destructor
|
||||
~weak_ptr () {
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_unref_weak ();
|
||||
|
||||
#ifdef _RWSTDDEBUG
|
||||
_C_pbody = (_C_base*)0xdeadbeefL;
|
||||
_C_ptr = (element_type*)0xdeadbeefL;
|
||||
#endif // _RWSTDDEBUG
|
||||
}
|
||||
|
||||
// assignment
|
||||
weak_ptr& operator= (const weak_ptr &__rhs) {
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_unref_weak ();
|
||||
if ((_C_pbody = __rhs._C_pbody))
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
_C_ptr = __rhs._C_ptr;
|
||||
return *this;
|
||||
}
|
||||
|
||||
template <class _TypeU>
|
||||
weak_ptr& operator= (const weak_ptr<_TypeU> &__rhs) {
|
||||
_C_is_convertible ((_TypeU*)0);
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_unref_weak ();
|
||||
if ((_C_pbody = __rhs._C_pbody))
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
_C_ptr = __rhs._C_ptr;
|
||||
return *this;
|
||||
}
|
||||
|
||||
template<class _TypeU>
|
||||
weak_ptr& operator=(const shared_ptr<_TypeU> &__rhs) {
|
||||
_C_is_convertible ((_TypeU*)0);
|
||||
if (_C_pbody)
|
||||
_C_pbody->_C_unref_weak ();
|
||||
if ((_C_pbody = __rhs._C_pbody))
|
||||
_C_pbody->_C_inc_ref_weak ();
|
||||
_C_ptr = __rhs._C_ptr;
|
||||
return *this;
|
||||
}
|
||||
|
||||
// modifiers
|
||||
|
||||
void swap (weak_ptr &__other) {
|
||||
_C_base* const __body = _C_pbody;
|
||||
element_type* const __ptr = _C_ptr;
|
||||
_C_pbody = __other._C_pbody;
|
||||
_C_ptr = __other._C_ptr;
|
||||
__other._C_pbody = __body;
|
||||
__other._C_ptr = __ptr;
|
||||
}
|
||||
|
||||
void reset () {
|
||||
if (_C_pbody) {
|
||||
_C_pbody->_C_unref_weak ();
|
||||
_C_pbody = 0;
|
||||
_C_ptr = 0;
|
||||
}
|
||||
}
|
||||
|
||||
// observers
|
||||
long use_count () const {
|
||||
return _C_pbody ? _C_pbody->_C_get_ref () : 0;
|
||||
}
|
||||
|
||||
bool expired () const {
|
||||
return 0 == use_count ();
|
||||
}
|
||||
|
||||
shared_ptr<element_type>
|
||||
lock () const {
|
||||
return expired () ? shared_ptr<element_type>()
|
||||
: shared_ptr<element_type>(*this);
|
||||
}
|
||||
|
||||
// implements 2.2.4.6 - non-member template operator<
|
||||
template <class _TypeU>
|
||||
bool operator< (const weak_ptr<_TypeU> __rhs) const {
|
||||
return _C_pbody < __rhs._C_pbody;
|
||||
}
|
||||
|
||||
private:
|
||||
|
||||
// helper to check whether one pointer is convertible to another
|
||||
// and to enforce the convertibility requirements
|
||||
static void _C_is_convertible (element_type*) { }
|
||||
};
|
||||
|
||||
|
||||
// 2.2.4.6 - weak_ptr comparison
|
||||
template <class _TypeT, class _TypeU>
|
||||
inline bool
|
||||
operator< (const weak_ptr<_TypeT> &__lhs, const weak_ptr<_TypeU> &__rhs)
|
||||
{
|
||||
return __lhs.operator< (__rhs);
|
||||
}
|
||||
|
||||
|
||||
// 2.2.4.7 - weak_ptr specialized algorithms
|
||||
template <class _TypeT>
|
||||
inline void
|
||||
swap (weak_ptr<_TypeT> &__lhs, weak_ptr<_TypeT> &__rhs)
|
||||
{
|
||||
__lhs.swap (__rhs);
|
||||
}
|
||||
|
||||
|
||||
// 2.2.5 - class enable_shared_from_this
|
||||
template <class _TypeT>
|
||||
class enable_shared_from_this;
|
||||
|
||||
|
||||
} // namespace tr1
|
||||
|
||||
} // namespace std
|
||||
|
||||
|
||||
#endif // _RWSTD_TR1_SMARTPTR_INCLUDED
|
||||
Reference in New Issue
Block a user