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/*
* Ouroboros - Copyright (C) 2016 - 2017
*
* Random Deletion Ring Buffer for Data Units
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef OUROBOROS_SHM_RDRBUFF_H
#define OUROBOROS_SHM_RDRBUFF_H
#include <ouroboros/shared.h>
#include <stdint.h>
#include <pthread.h>
#include <sys/types.h>
struct shm_du_buff;
struct shm_rdrbuff;
size_t shm_du_buff_get_idx(struct shm_du_buff * sdb);
struct shm_rdrbuff * shm_rdrbuff_create(void);
struct shm_rdrbuff * shm_rdrbuff_open(void);
void shm_rdrbuff_close(struct shm_rdrbuff * rdrb);
void shm_rdrbuff_destroy(struct shm_rdrbuff * rdrb);
void shm_rdrbuff_wait_full(struct shm_rdrbuff * rdrb);
/* returns the index of the buffer in the DU map */
ssize_t shm_rdrbuff_write(struct shm_rdrbuff * rdrb,
size_t headspace,
size_t tailspace,
uint8_t * data,
size_t data_len);
ssize_t shm_rdrbuff_write_b(struct shm_rdrbuff * rdrb,
size_t headspace,
size_t tailspace,
uint8_t * data,
size_t data_len);
ssize_t shm_rdrbuff_read(uint8_t ** dst,
struct shm_rdrbuff * rdrb,
size_t idx);
struct shm_du_buff * shm_rdrbuff_get(struct shm_rdrbuff * rdrb,
size_t idx);
int shm_rdrbuff_remove(struct shm_rdrbuff * rdrb,
size_t idx);
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);
void shm_du_buff_head_release(struct shm_du_buff * sdb,
size_t size);
void shm_du_buff_tail_release(struct shm_du_buff * sdb,
size_t size);
#endif /* OUROBOROS_SHM_RDRBUFF_H */
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