src/mem-mmap.c


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/* mem-mmap.c - mmap wrappings for large memory allocation
 *
 * Copyright (C) 2009 Timo Teräs <timo.teras@iki.fi>
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 or later as
 * published by the Free Software Foundation.
 *
 * See http://www.gnu.org/ for details.
 */

#include <sys/mman.h>
#include <libtf/defines.h>
#include <libtf/memory.h>

void *tf_bmem_alloc(size_t size)
{
	void *ptr;

	ptr = mmap(NULL, size, PROT_READ | PROT_WRITE,
		   MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
	if (ptr == MAP_FAILED)
		return NULL;
	return ptr;
}

void *tf_bmem_resize(void *oldptr, size_t oldsize, size_t newsize)
{
	void *ptr;

	ptr = mremap(oldptr, oldsize, newsize, MREMAP_MAYMOVE);
	if (ptr == MAP_FAILED)
		return NULL;
	return ptr;
}

void tf_bmem_free(void *ptr, size_t size)
{
	munmap(ptr, size);
}