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Add a way to adjust goodness.

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This commit is contained in:
Michael Graff 1999-10-19 22:06:08 +00:00
parent f36892bffa
commit ca924f706b
2 changed files with 52 additions and 1 deletions
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36
lib/dns/adb.c
View file

@ -1717,10 +1717,44 @@ dns_adb_marklame(dns_adb_t *adb, dns_adbaddrinfo_t *addr, dns_name_t *zone,
zi->lame_timer = expire_time;
bucket = addr->entry->lock_bucket;
LOCK(&adb->entrylocks[bucket]);
ISC_LIST_PREPEND(addr->entry->zoneinfo, zi, link);
UNLOCK(&adb->entrylocks[bucket]);
return (ISC_R_SUCCESS);
}
void
dns_adb_adjustgoodness(dns_adb_t *adb, dns_adbaddrinfo_t *addr,
int goodness_adjustment)
{
int bucket;
int old_goodness, new_goodness;
REQUIRE(DNS_ADBADDRINFO_VALID(addr));
if (goodness_adjustment == 0)
return;
bucket = addr->entry->lock_bucket;
LOCK(&adb->entrylocks[bucket]);
old_goodness = addr->entry->goodness;
if (goodness_adjustment > 0) {
if (old_goodness > INT_MAX - goodness_adjustment)
new_goodness = INT_MAX;
else
new_goodness = old_goodness + goodness_adjustment;
} else {
if (old_goodness < INT_MIN - goodness_adjustment)
new_goodness = INT_MAX;
else
new_goodness = old_goodness + goodness_adjustment;
}
addr->entry->goodness = new_goodness;
UNLOCK(&adb->entrylocks[bucket]);
}

17
lib/dns/include/dns/adb.h
View file

@ -387,6 +387,23 @@ dns_adb_marklame(dns_adb_t *adb, dns_adbaddrinfo_t *addr, dns_name_t *zone,
* ISC_R_NOMEMORY -- could not mark address as lame.
*/
void
dns_adb_adjustgoodness(dns_adb_t *adb, dns_adbaddrinfo_t *addr,
int goodness_adjustment);
/*
* Increase or decrease the address's goodness value.
*
* Requires:
*
* adb be valid.
*
* addr be valid.
*
* Note:
*
* Goodness values are silently clamped to INT_MAX and INT_MIN.
*/
/*
* XXX Need functions/macros to:
*