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/*
* Copyright (c) 2012 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TOKEN_BUCKET_H
#define TOKEN_BUCKET_H 1
#include <limits.h>
#include <stdbool.h>
struct token_bucket {
/* Configuration settings. */
unsigned int rate; /* Tokens added per millisecond. */
unsigned int burst; /* Max cumulative tokens credit. */
/* Current status. */
unsigned int tokens; /* Current number of tokens. */
long long int last_fill; /* Last time tokens added. */
};
#define TOKEN_BUCKET_INIT(RATE, BURST) { RATE, BURST, 0, LLONG_MIN }
void token_bucket_init(struct token_bucket *,
unsigned int rate, unsigned int burst);
void token_bucket_set(struct token_bucket *,
unsigned int rate, unsigned int burst);
bool token_bucket_withdraw(struct token_bucket *, unsigned int n);
void token_bucket_wait(struct token_bucket *, unsigned int n);
#endif /* token-bucket.h */
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