/** Memory allocators.
 *
 * @file
 * @author Steffen Vogel <stvogel@eonerc.rwth-aachen.de>
 * @copyright 2014-2016, Institute for Automation of Complex Power Systems, EONERC
 *   This file is part of VILLASnode. All Rights Reserved. Proprietary and confidential.
 *   Unauthorized copying of this file, via any medium is strictly prohibited.
 */

#include <stddef.h>

#ifndef _MEMORY_H_
#define _MEMORY_H_

typedef void *(*memzone_allocator_t)(size_t len);
typedef int (*memzone_deallocator_t)(void *ptr, size_t len);

enum memtype_flags {
	MEMORY_MMAP	= (1 << 0),
	MEMORY_DMA	= (1 << 1),
	MEMORY_HUGEPAGE	= (1 << 2),
	MEMORY_HEAP	= (1 << 3)
};

struct memtype {
	const char *name;
	int flags;
	
	size_t alignment;
	
	memzone_allocator_t alloc;
	memzone_deallocator_t free;
};

/** @todo Unused for now */
struct memzone {
	struct memtype * const type;
	
	void *addr;
	uintptr_t physaddr;
	size_t len; 
};

void * memory_alloc(const struct memtype *m, size_t len);

void * memory_alloc_aligned(const struct memtype *m, size_t len, size_t alignment);

int memory_free(const struct memtype *m, void *ptr, size_t len);

extern const struct memtype memtype_heap;
extern const struct memtype memtype_hugepage;

#endif /* _MEMORY_H_ */