/usr/include/isc/ratelimiter.h is in libbind-dev 1:9.9.5.dfsg-9+deb8u15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 | /*
* Copyright (C) 2004-2007, 2009 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1999-2002 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: ratelimiter.h,v 1.23 2009/01/18 23:48:14 tbox Exp $ */
#ifndef ISC_RATELIMITER_H
#define ISC_RATELIMITER_H 1
/*****
***** Module Info
*****/
/*! \file isc/ratelimiter.h
* \brief A rate limiter is a mechanism for dispatching events at a limited
* rate. This is intended to be used when sending zone maintenance
* SOA queries, NOTIFY messages, etc.
*/
/***
*** Imports.
***/
#include <isc/lang.h>
#include <isc/types.h>
ISC_LANG_BEGINDECLS
/*****
***** Functions.
*****/
isc_result_t
isc_ratelimiter_create(isc_mem_t *mctx, isc_timermgr_t *timermgr,
isc_task_t *task, isc_ratelimiter_t **ratelimiterp);
/*%<
* Create a rate limiter. The execution interval is initially undefined.
*/
isc_result_t
isc_ratelimiter_setinterval(isc_ratelimiter_t *rl, isc_interval_t *interval);
/*!<
* Set the minimum interval between event executions.
* The interval value is copied, so the caller need not preserve it.
*
* Requires:
* '*interval' is a nonzero interval.
*/
void
isc_ratelimiter_setpertic(isc_ratelimiter_t *rl, isc_uint32_t perint);
/*%<
* Set the number of events processed per interval timer tick.
* If 'perint' is zero it is treated as 1.
*/
isc_result_t
isc_ratelimiter_enqueue(isc_ratelimiter_t *rl, isc_task_t *task,
isc_event_t **eventp);
/*%<
* Queue an event for rate-limited execution.
*
* This is similar
* to doing an isc_task_send() to the 'task', except that the
* execution may be delayed to achieve the desired rate of
* execution.
*
* '(*eventp)->ev_sender' is used to hold the task. The caller
* must ensure that the task exists until the event is delivered.
*
* Requires:
*\li An interval has been set by calling
* isc_ratelimiter_setinterval().
*
*\li 'task' to be non NULL.
*\li '(*eventp)->ev_sender' to be NULL.
*/
void
isc_ratelimiter_shutdown(isc_ratelimiter_t *ratelimiter);
/*%<
* Shut down a rate limiter.
*
* Ensures:
*\li All events that have not yet been
* dispatched to the task are dispatched immediately with
* the #ISC_EVENTATTR_CANCELED bit set in ev_attributes.
*
*\li Further attempts to enqueue events will fail with
* #ISC_R_SHUTTINGDOWN.
*
*\li The rate limiter is no longer attached to its task.
*/
void
isc_ratelimiter_attach(isc_ratelimiter_t *source, isc_ratelimiter_t **target);
/*%<
* Attach to a rate limiter.
*/
void
isc_ratelimiter_detach(isc_ratelimiter_t **ratelimiterp);
/*%<
* Detach from a rate limiter.
*/
isc_result_t
isc_ratelimiter_stall(isc_ratelimiter_t *rl);
/*%<
* Stall event processing.
*/
isc_result_t
isc_ratelimiter_release(isc_ratelimiter_t *rl);
/*%<
* Release a stalled rate limiter.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_RATELIMITER_H */
|