// Copyright (c) 2010, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

/// @file scoped_ptr.h
/// @brief
/// @ingroup libaegisub

#pragma once

namespace agi {
/// A generic scoped holder for non-pointer handles
template<class T, class Del = void(*)(T)>
class scoped_holder {
	T value;
	Del destructor;

	scoped_holder(scoped_holder const&);
	scoped_holder& operator=(scoped_holder const&);
public:
	operator T() const { return value; }
	T operator->() const { return value; }

	scoped_holder& operator=(T new_value) {
		if (value)
			destructor(value);
		value = new_value;
		return *this;
	}

	scoped_holder(T value, Del destructor)
	: value(value)
	, destructor(destructor)
	{
	}

	~scoped_holder() { if (value) destructor(value); }
};
}