crown-engine/engine/core/memory/allocator.h

/*
 * Copyright (c) 2012-2014 Daniele Bartolini and individual contributors.
 * License: https://github.com/taylor001/crown/blob/master/LICENSE
 */

#pragma once

#include "types.h"

namespace crown
{

/// Base class for memory allocators.
///
/// @ingroup Memory
class Allocator
{
public:

	Allocator() {}
	virtual	~Allocator() {}

	/// Allocates @a size bytes of memory aligned to the specified
	/// @a align byte and returns a pointer to the first allocated byte.
	virtual void* allocate(size_t size, size_t align = DEFAULT_ALIGN) = 0;

	/// Deallocates a previously allocated block of memory pointed by @a data.
	virtual void deallocate(void* data) = 0;

	/// Returns the total number of bytes allocated.
	virtual size_t allocated_size() = 0;

	/// Default memory alignment in bytes.
	static const size_t DEFAULT_ALIGN = 4;

private:

	// Disable copying
	Allocator(const Allocator&);
	Allocator& operator=(const Allocator&);
};

} // namespace crown