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Diffstat (limited to 'extras/ezio/byteq.h')
-rw-r--r-- | extras/ezio/byteq.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/extras/ezio/byteq.h b/extras/ezio/byteq.h new file mode 100644 index 000000000..4397f6aaa --- /dev/null +++ b/extras/ezio/byteq.h @@ -0,0 +1,57 @@ +/* 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 */ |