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/* SPDX-License-Identifier: LGPL-2.1-only */
/* Copyright (C) 2020 Gediminas Jakutis */
#include <errno.h>
#include <stdlib.h>
#include "defs.h"
int cache_create(struct stream * const restrict in, const struct settings * const restrict s)
{
int ret;
void *cache;
try(!(cache = calloc(in->n, s->stride)), err, ENOMEM, "out of memory");
in->cache = cache;
err:
return ret;
}
int cache_populate(struct stream * const restrict in)
{
int ret = 0;
ssize_t i;
for (i = 0; i < in->n && !ret; ++i) {
ret = in->get_element(in, i, in->cache + i);
}
err:
return ret;
}
int cache_flush(struct stream * const in)
{
int ret;
ssize_t i;
for (i = 0; i < in->n && !ret; ++i) {
ret = in->put_element(in, i, in->cache + i);
}
err:
return ret;
}
int cache_destroy(struct stream * const in)
{
int ret;
try(!in->cache, err, EINVAL, "trying to destroy cache of uncached streadm");
free(in->cache);
in->cache = NULL;
err:
return ret;
}
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