You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
119 lines
2.4 KiB
119 lines
2.4 KiB
#ifndef BOOST_SCOPED_PTR_H_INCLUDED
|
|
#define BOOST_SCOPED_PTR_H_INCLUDED
|
|
|
|
// ADAPTED FOR indexlib
|
|
|
|
// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
|
|
// Copyright (c) 2001, 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)
|
|
//
|
|
// http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
|
|
//
|
|
|
|
#include "checked_delete.h"
|
|
|
|
#include <memory> // for std::auto_ptr
|
|
#include <assert.h>
|
|
|
|
namespace boost
|
|
{
|
|
|
|
|
|
// scoped_ptr mimics a built-in pointer except that it guarantees deletion
|
|
// of the object pointed to, either on destruction of the scoped_ptr or via
|
|
// an explicit reset(). scoped_ptr is a simple solution for simple needs;
|
|
// use shared_ptr or std::auto_ptr if your needs are more complex.
|
|
|
|
template<class T> class scoped_ptr // noncopyable
|
|
{
|
|
private:
|
|
|
|
T * ptr;
|
|
|
|
scoped_ptr(scoped_ptr const &);
|
|
scoped_ptr & operator=(scoped_ptr const &);
|
|
|
|
typedef scoped_ptr<T> this_type;
|
|
|
|
public:
|
|
|
|
typedef T element_type;
|
|
|
|
explicit scoped_ptr(T * p = 0): ptr(p) // never throws
|
|
{
|
|
}
|
|
|
|
|
|
explicit scoped_ptr(std::auto_ptr<T> p): ptr(p.release()) // never throws
|
|
{
|
|
}
|
|
|
|
~scoped_ptr() // never throws
|
|
{
|
|
boost::checked_delete(ptr);
|
|
}
|
|
|
|
void reset(T * p = 0) // never throws
|
|
{
|
|
assert(p == 0 || p != ptr); // catch self-reset errors
|
|
this_type(p).swap(*this);
|
|
}
|
|
|
|
T & operator*() const // never throws
|
|
{
|
|
assert(ptr != 0);
|
|
return *ptr;
|
|
}
|
|
|
|
T * operator->() const // never throws
|
|
{
|
|
assert(ptr != 0);
|
|
return ptr;
|
|
}
|
|
|
|
T * get() const // never throws
|
|
{
|
|
return ptr;
|
|
}
|
|
|
|
// implicit conversion to "bool"
|
|
|
|
typedef T * this_type::*unspecified_bool_type;
|
|
|
|
operator unspecified_bool_type() const // never throws
|
|
{
|
|
return ptr == 0? 0: &this_type::ptr;
|
|
}
|
|
|
|
bool operator! () const // never throws
|
|
{
|
|
return ptr == 0;
|
|
}
|
|
|
|
void swap(scoped_ptr & b) // never throws
|
|
{
|
|
T * tmp = b.ptr;
|
|
b.ptr = ptr;
|
|
ptr = tmp;
|
|
}
|
|
};
|
|
|
|
template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
|
|
{
|
|
a.swap(b);
|
|
}
|
|
|
|
// get_pointer(p) is a generic way to say p.get()
|
|
|
|
template<class T> inline T * get_pointer(scoped_ptr<T> const & p)
|
|
{
|
|
return p.get();
|
|
}
|
|
|
|
} // namespace boost
|
|
|
|
#endif // #ifndef BOOST_SCOPED_PTR_H_INCLUDED
|