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257. [bug] The server detached the last zone manager reference

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too early, while it could still be in use by queries.
                        This manifested itself as assertion failures during the
                        shutdown process for busy name servers (RT #133).

 256.   [func]          isc_ratelimiter_t now has attach/detach semantics, and
                        isc_ratelimiter_shutdown guarantees that the rate
                        limiter is detached from its task.

 255.   [func]          New function dns_zonemgr_attach().
This commit is contained in:
Andreas Gustafsson
2000-06-15 17:40:22 +00:00
parent b976f9c60a
commit aa79283a0d
5 changed files with 103 additions and 42 deletions
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33
lib/isc/include/isc/ratelimiter.h
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@@ -88,24 +88,29 @@ isc_ratelimiter_enqueue(isc_ratelimiter_t *rl, isc_task_t *task,
void
isc_ratelimiter_shutdown(isc_ratelimiter_t *ratelimiter);
/*
* Shut down a rate limiter. All events that have not yet been
* dispatched to the task are dispatched immediately with
* the ISC_EVENTATTR_CANCELED bit set in ev_attributes.
* Further attempts to enqueue events will fail with
* ISC_R_SHUTTINGDOWN.
* Shut down a rate limiter.
*
* Ensures:
* All events that have not yet been
* dispatched to the task are dispatched immediately with
* the ISC_EVENTATTR_CANCELED bit set in ev_attributes.
*
* Further attempts to enqueue events will fail with
* ISC_R_SHUTTINGDOWN.
*
* The reatelimiter is no longer attached to its task.
*/
void
isc_ratelimiter_destroy(isc_ratelimiter_t **ratelimiterp);
isc_ratelimiter_attach(isc_ratelimiter_t *source, isc_ratelimiter_t **target);
/*
* Destroy a rate limiter.
* Does not destroy the task or events already queued on it.
*
* Requires:
* The rate limiter to have been shut down.
*
* Ensures:
* Resources used by the rate limiter will be freed.
* Attach to a rate limiter.
*/
void
isc_ratelimiter_detach(isc_ratelimiter_t **ratelimiterp);
/*
* Detach from a rate limiter.
*/
ISC_LANG_ENDDECLS