ring_buf_item.c

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/*
 * SPDX-License-Identifier: MIT
 * SPDX-FileCopyrightText: 2024, Roy Ratcliffe, Northumberland, United Kingdom
 */
#include "ring_buf_item.h"
 
int ring_buf_item_put(struct ring_buf *buf, const void *item,
                      ring_buf_item_length_t length) {
  if (sizeof(length) + length > ring_buf_free_space(buf))
    return -EMSGSIZE;
  const ring_buf_size_t claim = ring_buf_put(buf, &length, sizeof(length));
  return claim + ring_buf_put(buf, item, length);
}
 
int ring_buf_item_get(struct ring_buf *buf, void *item,
                      ring_buf_item_length_t *length) {
  if (ring_buf_is_empty(buf))
    return -EAGAIN;
  const ring_buf_size_t claim = ring_buf_get(buf, length, sizeof(*length));
  return claim + ring_buf_get(buf, item, *length);
}