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elastic.h
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/*-
* Copyright (c) 2005-2020 Poul-Henning Kamp
* All rights reserved.
*
* Author: Poul-Henning Kamp <[email protected]>
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
struct elastic_match;
typedef void elastic_deliver_f(void *priv, const void *, size_t);
struct chunk {
TAILQ_ENTRY(chunk) next;
uint8_t *ptr;
ssize_t len;
ssize_t read;
};
struct elastic_subscriber {
TAILQ_ENTRY(elastic_subscriber) next;
struct elastic *ep;
elastic_deliver_f *func;
void *priv;
pthread_t thread;
int die;
pthread_cond_t cond;
TAILQ_HEAD(,chunk) chunks;
};
struct elastic {
struct rc3600 *cs;
TAILQ_HEAD(,elastic_subscriber) subscribers;
TAILQ_HEAD(,chunk) chunks_out;
TAILQ_HEAD(,chunk) chunks_in;
int text;
int mode;
nanosec bits_per_char;
nanosec bits_per_sec;
pthread_mutex_t mtx;
pthread_cond_t cond_in;
pthread_cond_t cond_out;
struct elastic_match *em;
struct elastic_fd *out;
};
struct elastic *elastic_new(struct rc3600 *, int mode);
nanosec nsec_per_char(const struct elastic *ep);
struct elastic_subscriber *elastic_subscribe(struct elastic *ep, elastic_deliver_f *, void *);
void elastic_unsubscribe(struct elastic *ep, struct elastic_subscriber *);
void elastic_inject(struct elastic *ep, const void *ptr, ssize_t len);
void elastic_put(struct elastic *ep, const void *ptr, ssize_t len);
ssize_t elastic_get(struct elastic *ep, void *ptr, ssize_t len);
int elastic_empty(const struct elastic *ep);
typedef int cli_elastic_f(struct elastic *ep, struct cli *);
cli_elastic_f cli_elastic;
cli_elastic_f cli_elastic_tcp;
cli_elastic_f cli_elastic_fd;
cli_elastic_f cli_elastic_match;
struct elastic_fd *elastic_fd_start(
struct elastic *ep, int fd, int mode, int selfdestruct);
void elastic_fd_stop(struct elastic_fd **efpp);