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/*
* Copyright (c) 2025 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of Hyra 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.
*/
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <vm/kalloc.h>
#include <lib/ptrbox.h>
static void *
ptrbox_heapalloc(struct ptrbox *pbox, size_t len)
{
struct ptrbox_aldes *aldes;
void *mem;
if (pbox == NULL || len == 0) {
return NULL;
}
mem = kalloc(len);
if (mem == NULL) {
return NULL;
}
/* Allocate a descriptor */
aldes = kalloc(sizeof(*aldes));
if (aldes == NULL) {
kfree(mem);
return NULL;
}
/* Initialize our descriptor */
aldes->type = PTRBOX_HEAP;
aldes->base = mem;
aldes->length = len;
/* Push it to the pointer box */
TAILQ_INSERT_TAIL(&pbox->allist, aldes, link);
++pbox->alcnt;
return mem;
}
void *
ptrbox_alloc(struct ptrbox *pbox, size_t len, ptrbox_altype_t type)
{
if (pbox == NULL || len == 0) {
return NULL;
}
switch (type) {
case PTRBOX_HEAP:
return ptrbox_heapalloc(pbox, len);
default:
return NULL;
}
return NULL;
}
void
ptrbox_free(struct ptrbox *pbox)
{
struct ptrbox_aldes *desc;
if (pbox == NULL) {
return;
}
TAILQ_FOREACH(desc, &pbox->allist, link) {
if (__unlikely(desc == NULL)) {
continue;
}
if (desc->base == NULL) {
kfree(desc);
continue;
}
switch (desc->type) {
case PTRBOX_HEAP:
kfree(desc->base);
break;
}
kfree(desc);
}
}
int
ptrbox_init(struct ptrbox *pbox)
{
if (pbox == NULL) {
return -EINVAL;
}
TAILQ_INIT(&pbox->allist);
pbox->alcnt = 0;
return 0;
}
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