browser/external/curl-8.3.0/docs/libcurl/curl_multi_wakeup.3
2023-09-27 13:43:06 -04:00

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.TH curl_multi_wakeup 3 "August 22, 2023" "libcurl 8.3.0" "libcurl"
.SH NAME
curl_multi_wakeup - wakes up a sleeping curl_multi_poll call
.SH SYNOPSIS
.nf
#include <curl/curl.h>
CURLMcode curl_multi_wakeup(CURLM *multi_handle);
.fi
.SH DESCRIPTION
This function can be called from any thread and it wakes up a sleeping
\fIcurl_multi_poll(3)\fP call that is currently (or is about to be) waiting
for activity or a timeout.
If the function is called when there is no \fIcurl_multi_poll(3)\fP call, it
causes the next call to return immediately.
Calling this function only guarantees to wake up the current (or the next if
there is no current) \fIcurl_multi_poll(3)\fP call, which means it is possible
that multiple calls to this function wake up the same waiting operation.
This function has no effect on \fIcurl_multi_wait(3)\fP calls.
.SH EXAMPLE
.nf
CURL *easy_handle;
CURLM *multi_handle;
/* add the individual easy handle */
curl_multi_add_handle(multi_handle, easy_handle);
/* this is thread 1 */
do {
CURLMcode mc;
int numfds;
mc = curl_multi_perform(multi_handle, &still_running);
if(mc == CURLM_OK) {
/* wait for activity, timeout or wakeup */
mc = curl_multi_poll(multi_handle, NULL, 0, 10000, &numfds);
}
if(time_to_die())
exit(1);
} while(still_running);
curl_multi_remove_handle(multi_handle, easy_handle);
/* this is thread 2 */
if(something makes us decide to stop thread 1) {
set_something_to_signal_thread_1_to_exit();
curl_multi_wakeup(multi_handle);
}
.fi
.SH AVAILABILITY
Added in 7.68.0
.SH RETURN VALUE
CURLMcode type, general libcurl multi interface error code.
.SH "SEE ALSO"
.BR curl_multi_poll "(3), " curl_multi_wait "(3)"