1/* 2 * Copyright © 2008 Kristian Høgsberg 3 * Copyright © 2013-2015 Red Hat, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the next 13 * paragraph) shall be included in all copies or substantial portions of the 14 * Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22 * DEALINGS IN THE SOFTWARE. 23 */ 24 25#pragma once 26 27#include "config.h" 28 29#include <stdint.h> 30 31enum ratelimit_state { 32 RATELIMIT_EXCEEDED, 33 RATELIMIT_THRESHOLD, 34 RATELIMIT_PASS, 35}; 36 37struct ratelimit { 38 uint64_t interval; 39 uint64_t begin; 40 unsigned int burst; 41 unsigned int num; 42}; 43 44void ratelimit_init(struct ratelimit *r, uint64_t ival_us, unsigned int burst); 45enum ratelimit_state ratelimit_test(struct ratelimit *r); 46