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path: root/lib/librte_malloc/rte_malloc.c
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/*-
 *   BSD LICENSE
 * 
 *   Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
 *   All rights reserved.
 * 
 *   Redistribution and use in source and binary forms, with or without 
 *   modification, are permitted provided that the following conditions 
 *   are met:
 * 
 *     * Redistributions of source code must retain the above copyright 
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright 
 *       notice, this list of conditions and the following disclaimer in 
 *       the documentation and/or other materials provided with the 
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its 
 *       contributors may be used to endorse or promote products derived 
 *       from this software without specific prior written permission.
 * 
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 *  version: DPDK.L.1.2.3-3
 */

#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <sys/queue.h>

#include <rte_memcpy.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_tailq.h>
#include <rte_eal.h>
#include <rte_branch_prediction.h>
#include <rte_debug.h>
#include <rte_launch.h>
#include <rte_per_lcore.h>
#include <rte_lcore.h>
#include <rte_common.h>
#include <rte_spinlock.h>

#include <rte_malloc.h>
#include "malloc_elem.h"
#include "malloc_heap.h"

static struct malloc_heap malloc_heap[RTE_MAX_NUMA_NODES] = {
		{ .initialised = NOT_INITIALISED }
};

/* Free the memory space back to heap */
void rte_free(void *addr)
{
	if (addr == NULL) return;
	if (malloc_elem_free(malloc_elem_from_data(addr)) < 0)
		rte_panic("Fatal error: Invalid memory\n");
}

/*
 * Allocate memory on default heap.
 */
void *
rte_malloc(const char *type, size_t size, unsigned align)
{
	unsigned malloc_socket = malloc_get_numa_socket();
	/* return NULL if size is 0 or alignment is not power-of-2 */
	if (size == 0 || !rte_is_power_of_2(align))
		return NULL;
	return malloc_heap_alloc(&malloc_heap[malloc_socket], type,
			size, align == 0 ? 1 : align);
}

/*
 * Allocate zero'd memory on default heap.
 */
void *
rte_zmalloc(const char *type, size_t size, unsigned align)
{
	void *ptr = rte_malloc(type, size, align);

	if (ptr != NULL)
		memset(ptr, 0, size);
	return ptr;
}

/*
 * Allocate zero'd memory on default heap.
 */
void *
rte_calloc(const char *type, size_t num, size_t size, unsigned align)
{
	return rte_zmalloc(type, num * size, align);
}

/*
 * Resize allocated memory.
 */
void *
rte_realloc(void *ptr, size_t size, unsigned align)
{
	if (ptr == NULL)
		return rte_malloc(NULL, size, align);

	struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (elem == NULL)
		rte_panic("Fatal error: memory corruption detected\n");

	size = CACHE_LINE_ROUNDUP(size), align = CACHE_LINE_ROUNDUP(align);
	/* check alignment matches first, and if ok, see if we can resize block */
	if (RTE_ALIGN(ptr,align) == ptr &&
			malloc_elem_resize(elem, size) == 0)
		return ptr;

	/* either alignment is off, or we have no room to expand,
	 * so move data. */
	void *new_ptr = rte_malloc(NULL, size, align);
	if (new_ptr == NULL)
		return NULL;
	const unsigned old_size = elem->size - MALLOC_ELEM_OVERHEAD;
	rte_memcpy(new_ptr, ptr, old_size < size ? old_size : size);
	rte_free(ptr);

	return new_ptr;
}

int
rte_malloc_validate(void *ptr, size_t *size)
{
	struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (!malloc_elem_cookies_ok(elem))
		return -1;
	if (size != NULL)
		*size = elem->size - elem->pad - MALLOC_ELEM_OVERHEAD;
	return 0;
}
/*
 * TODO: Print stats on memory type. If type is NULL, info on all types is printed
 */
void
rte_malloc_dump_stats(__rte_unused const char *type)
{
	return;
}

/*
 * TODO: Set limit to memory that can be allocated to memory type
 */
int
rte_malloc_set_limit(__rte_unused const char *type,
		__rte_unused size_t max)
{
	return 0;
}