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8c9e7631c5
Previously, we reused the jsonrpc byteq with the state from a previous iteration with potentially less headroom. However, in case we have an empty byteq, we can forward the pointers to maximize the available headroom and thus, the number of bytes that we can process in a single iteration. Co-authored-by: Felix Huettner <felix.huettner@stackit.cloud> Signed-off-by: Felix Huettner <felix.huettner@stackit.cloud> Signed-off-by: Martin Morgenstern <martin.morgenstern@cloudandheat.com> Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* Copyright (c) 2008, 2009, 2013 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef BYTEQ_H
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#define BYTEQ_H 1
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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/* General-purpose circular queue of bytes. */
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struct byteq {
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uint8_t *buffer; /* Circular queue. */
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unsigned int size; /* Number of bytes allocated for 'buffer'. */
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unsigned int head; /* Head of queue. */
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unsigned int tail; /* Chases the head. */
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};
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void byteq_init(struct byteq *, uint8_t *buffer, size_t size);
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int byteq_used(const struct byteq *);
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int byteq_avail(const struct byteq *);
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bool byteq_is_empty(const struct byteq *);
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bool byteq_is_full(const struct byteq *);
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void byteq_put(struct byteq *, uint8_t c);
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void byteq_putn(struct byteq *, const void *, size_t n);
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void byteq_put_string(struct byteq *, const char *);
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uint8_t byteq_get(struct byteq *);
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int byteq_write(struct byteq *, int fd);
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int byteq_read(struct byteq *, int fd);
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uint8_t *byteq_head(struct byteq *);
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int byteq_headroom(const struct byteq *);
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void byteq_advance_head(struct byteq *, unsigned int n);
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int byteq_tailroom(const struct byteq *);
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const uint8_t *byteq_tail(const struct byteq *);
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void byteq_advance_tail(struct byteq *, unsigned int n);
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void byteq_fast_forward(struct byteq *);
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#endif /* byteq.h */
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