Eduardo Bart
12 years ago
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/*
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* Copyright (c) 2010-2012 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef STDEXT_SHARED_OBJECT_H
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#define STDEXT_SHARED_OBJECT_H
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#include <boost/checked_delete.hpp>
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#include <boost/intrusive_ptr.hpp>
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namespace stdext {
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template<typename T>
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using shared_object_ptr = boost::intrusive_ptr<T>;
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class shared_object
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{
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public:
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shared_object() : m_refs(0) { }
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virtual ~shared_object() { }
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void add_ref() { ++m_refs; assert(m_refs != 0xffffffff); }
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void dec_ref() {
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if(--m_refs == 0)
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boost::checked_delete(this);
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}
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bool is_unique_ref() { return m_refs == 1; }
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unsigned long ref_count() { return m_refs; }
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template<typename T>
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shared_object_ptr<T> self_cast() { return shared_object_ptr<T>(static_cast<T*>(this)); }
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template<typename T>
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shared_object_ptr<T> dynamic_self_cast() { return shared_object_ptr<T>(dynamic_cast<T*>(this)); }
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private:
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unsigned int m_refs;
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};
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template<class T, typename... Args>
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shared_object_ptr<T> make_shared_object(Args... args) { return shared_object_ptr<T>(new T(args...)); }
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}
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namespace std {
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template<typename T>
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struct hash<boost::intrusive_ptr<T>> : public __hash_base<size_t, boost::intrusive_ptr<T>> {
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size_t operator()(const boost::intrusive_ptr<T>& p) const noexcept { return std::hash<T*>()(p.get()); }
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};
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}
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template<typename T>
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struct remove_const_ref {
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typedef typename std::remove_const<typename std::remove_reference<T>::type>::type type;
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};
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template<typename T>
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void intrusive_ptr_add_ref(T* p) { (static_cast<stdext::shared_object*>(p))->add_ref(); }
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template<typename T>
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void intrusive_ptr_release(T* p) { (static_cast<stdext::shared_object*>(p))->dec_ref(); }
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#endif
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