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// Copyright (C) 2007 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_SCOPED_PTr_
#define DLIB_SCOPED_PTr_
#include <algorithm>
#include "../noncopyable.h"
#include "../algs.h"
#include "scoped_ptr_abstract.h"
namespace dlib
{
// ----------------------------------------------------------------------------------------
template <typename T>
struct default_deleter
{
void operator() (T* item) const
{
delete item;
}
};
template <typename T>
struct default_deleter<T[]>
{
void operator() (T* item) const
{
delete [] item;
}
};
// ----------------------------------------------------------------------------------------
template <
typename T,
typename deleter = default_deleter<T>
>
class scoped_ptr : noncopyable
{
/*!
CONVENTION
- get() == ptr
!*/
public:
typedef T element_type;
typedef deleter deleter_type;
explicit scoped_ptr (
T* p = 0
) : ptr(p) { }
~scoped_ptr()
{
if (ptr)
{
deleter del;
del(ptr);
}
}
void reset (
T* p = 0
)
{
if (ptr)
{
deleter del;
del(ptr);
}
ptr = p;
}
T& operator*() const
{
DLIB_ASSERT(get() != 0,
"\tscoped_ptr::operator*()"
<< "\n\tget() can't be null if you are going to dereference it"
<< "\n\tthis: " << this
);
return *ptr;
}
T* operator->() const
{
DLIB_ASSERT(get() != 0,
"\tscoped_ptr::operator*()"
<< "\n\tget() can't be null"
<< "\n\tthis: " << this
);
return ptr;
}
T* get() const
{
return ptr;
}
operator bool() const
{
return (ptr != 0);
}
void swap(
scoped_ptr& b
)
{
std::swap(ptr,b.ptr);
}
private:
T* ptr;
};
// ----------------------------------------------------------------------------------------
template <
typename T,
typename deleter
>
class scoped_ptr<T[],deleter> : noncopyable
{
/*!
CONVENTION
- get() == ptr
!*/
public:
typedef T element_type;
explicit scoped_ptr (
T* p = 0
) : ptr(p) { }
~scoped_ptr()
{
if (ptr)
{
deleter del;
del(ptr);
}
}
void reset (
T* p = 0
)
{
if (ptr)
{
deleter del;
del(ptr);
}
ptr = p;
}
T& operator[] (
unsigned long idx
) const
{
DLIB_ASSERT(get() != 0,
"\tscoped_ptr::operator[]()"
<< "\n\tget() can't be null if you are going to dereference it"
<< "\n\tthis: " << this
);
return ptr[idx];
}
T* get() const
{
return ptr;
}
operator bool() const
{
return (ptr != 0);
}
void swap(
scoped_ptr& b
)
{
std::swap(ptr,b.ptr);
}
private:
T* ptr;
};
// ----------------------------------------------------------------------------------------
template <
typename T,
typename deleter
>
void swap(
scoped_ptr<T,deleter>& a,
scoped_ptr<T,deleter>& b
)
{
a.swap(b);
}
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_SCOPED_PTr_
|
