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event: fix wakeup consumption

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The events on a multi wakeup socketpair were only consumed via
curl_multi_poll()/curl_multi_wait() but not in event based processing on
a curl_multi_socket() call. That led to busy loops as reported in

Fixes #21547
Reported-by: Earnestly on github
Closes #21549
This commit is contained in:
Stefan Eissing 2026-05-11 14:56:04 +02:00 • committed by Daniel Stenberg
parent 01f08dc4eb
commit 2a2104f3cf
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lib/multi.c
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@ -2703,6 +2703,11 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
Curl_uint32_bset_remove(&multi->dirty, data->mid);
if(data == multi->admin) {
#ifdef ENABLE_WAKEUP
/* Consume any pending wakeup signals before processing.
* This is necessary for event based processing. See #21547 */
(void)Curl_wakeup_consume(multi->wakeup_pair, TRUE);
#endif
#ifdef USE_RESOLV_THREADED
Curl_async_thrdd_multi_process(multi);
#endif