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dnscache: slight refactoring

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Slight refactoring around dnscache, e.g. hostcache

- eliminate `data->state.hostcache`. Always look up
  relevant dnscache at share/multi.
- unify naming to "dnscache", replacing "hostcache"
- use `struct Curl_dnscache`, even though it just
  contains a `Curl_hash` for now.
- add `Curl_dnscache_destroy()` for cleanup in
  share/multi.

Closes #16941
This commit is contained in:
Stefan Eissing 2025-04-03 13:11:32 +02:00 • committed by Daniel Stenberg
parent 6140a574de
commit 01e76702ac
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GPG key ID: 5CC908FDB71E12C2
14 changed files with 217 additions and 255 deletions
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10
lib/setopt.c
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@ -1569,11 +1569,6 @@ static CURLcode setopt_pointers(struct Curl_easy *data, CURLoption option,
if(data->share) {
Curl_share_lock(data, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE);
if(data->dns.hostcachetype == HCACHE_SHARED) {
data->dns.hostcache = NULL;
data->dns.hostcachetype = HCACHE_NONE;
}
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
if(data->share->cookies == data->cookies)
data->cookies = NULL;
@ -1603,11 +1598,6 @@ static CURLcode setopt_pointers(struct Curl_easy *data, CURLoption option,
data->share->dirty++;
if(data->share->specifier & (1 << CURL_LOCK_DATA_DNS)) {
/* use shared host cache */
data->dns.hostcache = &data->share->hostcache;
data->dns.hostcachetype = HCACHE_SHARED;
}
#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
if(data->share->cookies) {
/* use shared cookie list, first free own one if any */