mirror of
https://salsa.debian.org/ha-team/libqb
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89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/*
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* Copyright (C) 2010 Red Hat, Inc.
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*
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* Author: Angus Salkeld <asalkeld@redhat.com>
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*
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* This file is part of libqb.
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*
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* libqb is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* libqb is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with libqb. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _RINGBUFFER_H_
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#define _RINGBUFFER_H_
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#include <config.h>
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE 1
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#endif
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#include "os_base.h"
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#include <limits.h>
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#include <sys/mman.h>
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#include <sys/sem.h>
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#include <sys/ipc.h>
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#include <pthread.h>
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#include <semaphore.h>
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#include "util_int.h"
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#include <qb/qbutil.h>
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#include <qb/qbrb.h>
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struct qb_ringbuffer_shared_s {
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volatile uint32_t write_pt;
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volatile uint32_t read_pt;
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uint32_t size;
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uint32_t count;
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char hdr_path[PATH_MAX];
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char data_path[PATH_MAX];
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int32_t ref_count;
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#if _POSIX_THREAD_PROCESS_SHARED > 0
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sem_t posix_sem;
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pthread_spinlock_t spinlock;
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#endif
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};
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struct qb_ringbuffer_s {
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uint32_t flags;
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#if _POSIX_THREAD_PROCESS_SHARED < 1
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int32_t lock_id;
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int32_t sem_id;
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#endif
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struct qb_ringbuffer_shared_s *shared_hdr;
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uint32_t *shared_data;
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};
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#if defined(_SEM_SEMUN_UNDEFINED)
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union semun {
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int val;
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struct semid_ds *buf;
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unsigned short int *array;
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struct seminfo *__buf;
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};
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#endif /* _SEM_SEMUN_UNDEFINED */
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#define RB_NS_IN_MSEC 1000000ULL
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int32_t my_lock_it_create(qb_ringbuffer_t * rb, uint32_t flags);
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int32_t my_lock_it(qb_ringbuffer_t * rb);
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int32_t my_unlock_it(qb_ringbuffer_t * rb);
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int32_t my_lock_it_destroy(qb_ringbuffer_t * rb);
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int32_t my_sem_create(qb_ringbuffer_t * rb, uint32_t flags);
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int32_t my_sem_post(qb_ringbuffer_t * rb);
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int32_t my_sem_timedwait(qb_ringbuffer_t * rb, int32_t ms_timeout);
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int32_t my_sem_destroy(qb_ringbuffer_t * rb);
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#endif /* _RINGBUFFER_H_ */
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