94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
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//
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// Copyright (c) 2010 Artyom Beilis (Tonkikh)
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_LOCALE_HOLD_PTR_H
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#define BOOST_LOCALE_HOLD_PTR_H
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namespace boost {
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namespace locale {
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///
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/// \brief a smart pointer similar to std::auto_ptr but it is non-copyable and the
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/// underlying object has the same constness as the pointer itself (unlike an ordinary pointer).
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///
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template<typename T>
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class hold_ptr {
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hold_ptr(hold_ptr const &other); // non copyable
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hold_ptr const &operator=(hold_ptr const &other); // non assignable
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public:
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///
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/// Create new empty pointer
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///
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hold_ptr() : ptr_(0) {}
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///
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/// Create a pointer that holds \a v, ownership is transferred to smart pointer
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///
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explicit hold_ptr(T *v) : ptr_(v) {}
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///
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/// Destroy smart pointer and the object it owns.
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///
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~hold_ptr()
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{
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delete ptr_;
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}
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///
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/// Get a const pointer to the object
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///
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T const *get() const { return ptr_; }
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///
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/// Get a mutable pointer to the object
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///
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T *get() { return ptr_; }
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///
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/// Get a const reference to the object
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///
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T const &operator *() const { return *ptr_; }
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///
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/// Get a mutable reference to the object
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///
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T &operator *() { return *ptr_; }
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///
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/// Get a const pointer to the object
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///
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T const *operator->() const { return ptr_; }
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///
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/// Get a mutable pointer to the object
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///
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T *operator->() { return ptr_; }
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///
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/// Transfer an ownership on the pointer to user
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///
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T *release() { T *tmp=ptr_; ptr_=0; return tmp; }
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///
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/// Set new value to pointer, previous object is destroyed, ownership on new object is transferred
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///
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void reset(T *p=0)
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{
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if(ptr_) delete ptr_;
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ptr_=p;
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}
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/// Swap two pointers
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void swap(hold_ptr &other)
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{
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T *tmp=other.ptr_;
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other.ptr_=ptr_;
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ptr_=tmp;
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}
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private:
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T *ptr_;
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};
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} // locale
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} // boost
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#endif
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// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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