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Diffstat (limited to 'libs/libevent/src/ratelim-internal.h')
| -rw-r--r-- | libs/libevent/src/ratelim-internal.h | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/libs/libevent/src/ratelim-internal.h b/libs/libevent/src/ratelim-internal.h deleted file mode 100644 index 6cc1cdde2c..0000000000 --- a/libs/libevent/src/ratelim-internal.h +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ -#ifndef RATELIM_INTERNAL_H_INCLUDED_ -#define RATELIM_INTERNAL_H_INCLUDED_ - -#ifdef __cplusplus -extern "C" { -#endif - -#include "event2/util.h" - -/** A token bucket is an internal structure that tracks how many bytes we are - * currently willing to read or write on a given bufferevent or group of - * bufferevents */ -struct ev_token_bucket { - /** How many bytes are we willing to read or write right now? These - * values are signed so that we can do "defecit spending" */ - ev_ssize_t read_limit, write_limit; - /** When was this bucket last updated? Measured in abstract 'ticks' - * relative to the token bucket configuration. */ - ev_uint32_t last_updated; -}; - -/** Configuration info for a token bucket or set of token buckets. */ -struct ev_token_bucket_cfg { - /** How many bytes are we willing to read on average per tick? */ - size_t read_rate; - /** How many bytes are we willing to read at most in any one tick? */ - size_t read_maximum; - /** How many bytes are we willing to write on average per tick? */ - size_t write_rate; - /** How many bytes are we willing to write at most in any one tick? */ - size_t write_maximum; - - /* How long is a tick? Note that fractions of a millisecond are - * ignored. */ - struct timeval tick_timeout; - - /* How long is a tick, in milliseconds? Derived from tick_timeout. */ - unsigned msec_per_tick; -}; - -/** The current tick is 'current_tick': add bytes to 'bucket' as specified in - * 'cfg'. */ -int ev_token_bucket_update_(struct ev_token_bucket *bucket, - const struct ev_token_bucket_cfg *cfg, - ev_uint32_t current_tick); - -/** In which tick does 'tv' fall according to 'cfg'? Note that ticks can - * overflow easily; your code needs to handle this. */ -ev_uint32_t ev_token_bucket_get_tick_(const struct timeval *tv, - const struct ev_token_bucket_cfg *cfg); - -/** Adjust 'bucket' to respect 'cfg', and note that it was last updated in - * 'current_tick'. If 'reinitialize' is true, we are changing the - * configuration of 'bucket'; otherwise, we are setting it up for the first - * time. - */ -int ev_token_bucket_init_(struct ev_token_bucket *bucket, - const struct ev_token_bucket_cfg *cfg, - ev_uint32_t current_tick, - int reinitialize); - -int bufferevent_remove_from_rate_limit_group_internal_(struct bufferevent *bev, - int unsuspend); - -/** Decrease the read limit of 'b' by 'n' bytes */ -#define ev_token_bucket_decrement_read(b,n) \ - do { \ - (b)->read_limit -= (n); \ - } while (0) -/** Decrease the write limit of 'b' by 'n' bytes */ -#define ev_token_bucket_decrement_write(b,n) \ - do { \ - (b)->write_limit -= (n); \ - } while (0) - -#ifdef __cplusplus -} -#endif - -#endif |