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/* Copyright (c) 2008, 2009 Nicira Networks, Inc.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, Nicira Networks gives permission
* to link the code of its release of vswitchd with the OpenSSL project's
* "OpenSSL" library (or with modified versions of it that use the same
* license as the "OpenSSL" library), and distribute the linked
* executables. You must obey the GNU General Public License in all
* respects for all of the code used other than "OpenSSL". If you modify
* this file, you may extend this exception to your version of the file,
* but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version.
*
*/
#ifndef BYTEQ_H
#define BYTEQ_H 1
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
/* Maximum number of bytes in a byteq. */
#define BYTEQ_SIZE 512
/* General-purpose circular queue of bytes. */
struct byteq {
uint8_t buffer[BYTEQ_SIZE]; /* Circular queue. */
unsigned int head; /* Head of queue. */
unsigned int tail; /* Chases the head. */
};
void byteq_init(struct byteq *);
int byteq_used(const struct byteq *);
int byteq_avail(const struct byteq *);
bool byteq_is_empty(const struct byteq *);
bool byteq_is_full(const struct byteq *);
void byteq_put(struct byteq *, uint8_t c);
void byteq_putn(struct byteq *, const void *, size_t n);
void byteq_put_string(struct byteq *, const char *);
uint8_t byteq_get(struct byteq *);
int byteq_write(struct byteq *, int fd);
int byteq_read(struct byteq *, int fd);
#endif /* byteq.h */
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