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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/types.h>
#include <sys/sunddi.h>
#include <sys/kmem.h>
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <smbsrv/alloc.h>
#define MEM_HDR_SIZE 8
static uint32_t mem_get_size(void *ptr);
void *
mem_malloc(uint32_t size)
{
uint8_t *p;
size += MEM_HDR_SIZE;
p = kmem_alloc(size, KM_SLEEP);
/*LINTED E_BAD_PTR_CAST_ALIGN*/
*(uint32_t *)p = size;
p += MEM_HDR_SIZE;
return (p);
}
void *
mem_zalloc(uint32_t size)
{
uint8_t *p;
p = mem_malloc(size);
(void) memset(p, 0, size);
return (p);
}
char *
mem_strdup(const char *ptr)
{
char *p;
size_t size;
size = strlen(ptr) + 1;
p = mem_malloc(size);
(void) memcpy(p, ptr, size);
return (p);
}
static uint32_t
mem_get_size(void *ptr)
{
uint32_t *p;
/*LINTED E_BAD_PTR_CAST_ALIGN*/
p = (uint32_t *)((uint8_t *)ptr - MEM_HDR_SIZE);
return (*p);
}
void *
mem_realloc(void *ptr, uint32_t size)
{
void *new_ptr;
uint32_t current_size;
if (ptr == NULL)
return (mem_malloc(size));
if (size == 0) {
smb_mem_free(ptr);
return (NULL);
}
current_size = mem_get_size(ptr) - MEM_HDR_SIZE;
if (size <= current_size)
return (ptr);
new_ptr = mem_malloc(size);
(void) memcpy(new_ptr, ptr, current_size);
smb_mem_free(ptr);
return (new_ptr);
}
void
smb_mem_free(void *ptr)
{
uint8_t *p;
if (ptr == 0)
return;
p = (uint8_t *)ptr - MEM_HDR_SIZE;
/*LINTED E_BAD_PTR_CAST_ALIGN*/
kmem_free(p, *(uint32_t *)p);
}
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