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https://github.com/openvswitch/ovs
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648f4f1fe4
This commit converts two rate-limiters in the tree to use the library. I intend to use the library elsewhere in the future. Signed-off-by: Ben Pfaff <blp@nicira.com>
43 lines
1.5 KiB
C
43 lines
1.5 KiB
C
/*
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* Copyright (c) 2012 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 TOKEN_BUCKET_H
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#define TOKEN_BUCKET_H 1
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#include <limits.h>
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#include <stdbool.h>
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struct token_bucket {
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/* Configuration settings. */
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unsigned int rate; /* Tokens added per millisecond. */
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unsigned int burst; /* Max cumulative tokens credit. */
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/* Current status. */
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unsigned int tokens; /* Current number of tokens. */
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long long int last_fill; /* Last time tokens added. */
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};
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#define TOKEN_BUCKET_INIT(RATE, BURST) { RATE, BURST, 0, LLONG_MIN }
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void token_bucket_init(struct token_bucket *,
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unsigned int rate, unsigned int burst);
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void token_bucket_set(struct token_bucket *,
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unsigned int rate, unsigned int burst);
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bool token_bucket_withdraw(struct token_bucket *, unsigned int n);
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void token_bucket_wait(struct token_bucket *, unsigned int n);
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#endif /* token-bucket.h */
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