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/* SPDX-License-Identifier: copyleft-next-0.3.1 */
/* Copyright 2023 Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file res.c
* Simple resource manager implementation.
*/
#include <stdint.h>
#include <stdlib.h>
#include <ek/res.h>
/**
* Grow resource manager buffer.
* Doubles every call.
*
* @param r Resource manager to expand.
*/
static void res_expand(struct res *r)
{
r->max *= 2;
r->p = realloc(r->p, r->max * sizeof(void *));
}
struct res *res_create()
{
struct res *r = malloc(sizeof(struct res));
r->n = 0;
/* arbitrary number */
r->max = 1024;
r->p = calloc(1, r->max * sizeof(void *));
return r;
}
void res_add(struct res *r, void *p)
{
if (r->n >= r->max)
res_expand(r);
r->p[r->n++] = p;
}
void *res_alloc(struct res *r, size_t size)
{
void *p = malloc(size);
if (!p)
return NULL;
res_add(r, p);
return p;
}
void res_destroy(struct res *r)
{
for (size_t i = 0; i < r->n; ++i)
free(r->p[i]);
free(r->p);
free(r);
}
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