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/*
* Copyright (C) 2010 Red Hat, Inc.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* This file is part of libqb.
*
* libqb is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* libqb 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 libqb. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _RINGBUFFER_H_
#define _RINGBUFFER_H_
#include "os_base.h"
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif /* HAVE_SYS_MMAN_H */
#ifdef HAVE_SYS_SEM_H
#include <sys/sem.h>
#endif
#ifdef HAVE_SYS_IPC_H
#include <sys/ipc.h>
#endif
#include <pthread.h>
#include <semaphore.h>
#include "util_int.h"
#include <qb/qbutil.h>
#include <qb/qbrb.h>
struct qb_ringbuffer_s;
int32_t qb_rb_sem_create(struct qb_ringbuffer_s *rb, uint32_t flags);
typedef int32_t(*qb_rb_sem_post_fn_t) (struct qb_ringbuffer_s * rb);
typedef ssize_t(*qb_rb_sem_getvalue_fn_t) (struct qb_ringbuffer_s * rb);
typedef int32_t(*qb_rb_sem_timedwait_fn_t) (struct qb_ringbuffer_s * rb,
int32_t ms_timeout);
typedef int32_t(*qb_rb_sem_destroy_fn_t) (struct qb_ringbuffer_s * rb);
struct qb_ringbuffer_shared_s {
volatile uint32_t write_pt;
volatile uint32_t read_pt;
uint32_t word_size;
char hdr_path[PATH_MAX];
char data_path[PATH_MAX];
int32_t ref_count;
sem_t posix_sem;
char user_data[1];
};
struct qb_ringbuffer_s {
uint32_t flags;
int32_t sem_id;
struct qb_ringbuffer_shared_s *shared_hdr;
uint32_t *shared_data;
qb_rb_sem_post_fn_t sem_post_fn;
qb_rb_sem_getvalue_fn_t sem_getvalue_fn;
qb_rb_sem_timedwait_fn_t sem_timedwait_fn;
qb_rb_sem_destroy_fn_t sem_destroy_fn;
};
void qb_rb_force_close(qb_ringbuffer_t * rb);
#if defined(_SEM_SEMUN_UNDEFINED)
union semun {
int32_t val;
struct semid_ds *buf;
unsigned short int *array;
struct seminfo *__buf;
};
#endif /* _SEM_SEMUN_UNDEFINED */
#endif /* _RINGBUFFER_H_ */
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