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/*
* Ouroboros - Copyright (C) 2016 - 2021
*
* Data Buffer element in Random Deletion Ring Buffer
*
* Dimitri Staessens <dimitri@ouroboros.rocks>
* Sander Vrijders <sander@ouroboros.rocks>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1 as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., http://www.fsf.org/about/contact/.
*/
#ifndef OUROBOROS_SHM_DU_BUFF_H
#define OUROBOROS_SHM_DU_BUFF_H
#include <sys/types.h>
#include <stdint.h>
struct shm_du_buff;
size_t shm_du_buff_get_idx(struct shm_du_buff * sdb);
uint8_t * shm_du_buff_head(struct shm_du_buff * sdb);
uint8_t * shm_du_buff_tail(struct shm_du_buff * sdb);
uint8_t * shm_du_buff_head_alloc(struct shm_du_buff * sdb,
size_t size);
uint8_t * shm_du_buff_tail_alloc(struct shm_du_buff * sdb,
size_t size);
uint8_t * shm_du_buff_head_release(struct shm_du_buff * sdb,
size_t size);
uint8_t * shm_du_buff_tail_release(struct shm_du_buff * sdb,
size_t size);
void shm_du_buff_truncate(struct shm_du_buff * sdb,
size_t len);
int shm_du_buff_wait_ack(struct shm_du_buff * sdb);
int shm_du_buff_ack(struct shm_du_buff * sdb);
#endif /* OUROBOROS_SHM_DU_BUFF_H */
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