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/*
* Ouroboros - Copyright (C) 2016
*
* Shared memory map for data units
*
* Dimitri Staessens <dimitri.staessens@intec.ugent.be>
* Sander Vrijders <sander.vrijders@intec.ugent.be>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef OUROBOROS_SHM_DU_MAP_H
#define OUROBOROS_SHM_DU_MAP_H
#ifndef SHM_DU_BUFF_BLOCK_SIZE
#define SHM_DU_BUFF_BLOCK_SIZE sysconf(_SC_PAGESIZE)
#endif
#ifndef SHM_DU_MAP_FILENAME
#define SHM_DU_MAP_FILENAME "ouroboros_du_map"
#endif
#ifndef SHM_BLOCKS_IN_MAP
#define SHM_BLOCKS_IN_MAP (1 << 14)
#endif
#include "common.h"
#include <sys/types.h>
#include <pthread.h>
struct shm_du_buff;
struct shm_du_map;
struct shm_du_map * shm_du_map_create();
struct shm_du_map * shm_du_map_open();
void shm_du_map_close(struct shm_du_map * dum);
void shm_du_map_destroy(struct shm_du_map * dum);
pid_t shm_du_map_owner(struct shm_du_map * dum);
void * shm_du_map_sanitize(void * o);
/* returns the index of the buffer in the DU map */
ssize_t shm_create_du_buff(struct shm_du_map * dum,
size_t size,
size_t headspace,
uint8_t * data,
size_t len);
/* FIXME: revise these */
int shm_du_map_read_sdu(uint8_t ** dst,
struct shm_du_map * dum,
ssize_t idx);
int shm_release_du_buff(struct shm_du_map * dum,
ssize_t idx);
/* FIXME: use shm_du_map * and index */
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);
int shm_du_buff_head_release(struct shm_du_buff * sdb,
size_t size);
int shm_du_buff_tail_release(struct shm_du_buff * sdb,
size_t size);
#endif /* OUROBOROS_SHM_DU_MAP_H */
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