| Server IP : 185.124.137.236 / Your IP : 216.73.217.6 Web Server : LiteSpeed System : Linux id-dci-web1986.main-hosting.eu 5.14.0-611.26.1.el9_7.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jan 29 05:24:47 EST 2026 x86_64 User : u686484674 ( 686484674) PHP Version : 8.0.30 Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail MySQL : OFF | cURL : ON | WGET : ON | Perl : OFF | Python : OFF | Sudo : OFF | Pkexec : OFF Directory : /proc/self/root/opt/alt/curlssl30/usr/share/man/man3/ |
Upload File : |
.\" generated by cd2nroff 0.1 from curl_multi_wakeup.md
.TH curl_multi_wakeup 3 "2025-06-27" libcurl
.SH NAME
curl_multi_wakeup \- wake 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 PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
extern int time_to_die(void);
extern int set_something_to_signal_thread_1_to_exit(void);
extern int decide_to_stop_thread1();
int main(void)
{
CURL *easy;
CURLM *multi = curl_multi_init();
int still_running;
easy = curl_easy_init();
/* add the individual easy handle */
curl_multi_add_handle(multi, easy);
/* this is thread 1 */
do {
CURLMcode mc;
int numfds;
mc = curl_multi_perform(multi, &still_running);
if(mc == CURLM_OK) {
/* wait for activity, timeout or wakeup */
mc = curl_multi_poll(multi, NULL, 0, 10000, &numfds);
}
if(time_to_die())
return 1;
} while(still_running);
curl_multi_remove_handle(multi, easy);
/* this is thread 2 */
if(decide_to_stop_thread1()) {
set_something_to_signal_thread_1_to_exit();
curl_multi_wakeup(multi);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.68.0
.SH RETURN VALUE
This function returns a CURLMcode indicating success or error.
CURLM_OK (0) means everything was OK, non\-zero means an error occurred, see
\fIlibcurl\-errors(3)\fP.
.SH SEE ALSO
.BR curl_multi_poll (3),
.BR curl_multi_wait (3)