1curl_multi_wakeup(3)            libcurl Manual            curl_multi_wakeup(3)
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NAME

6       curl_multi_wakeup - wakes up a sleeping curl_multi_poll call
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SYNOPSIS

9       #include <curl/curl.h>
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11       CURLMcode curl_multi_wakeup(CURLM *multi_handle);
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DESCRIPTION

14       This  function can be called from any thread and it wakes up a sleeping
15       curl_multi_poll(3) call that is currently  (or  will  be)  waiting  for
16       activity or a timeout.
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18       If  the function is called when there is no curl_multi_poll(3) call, it
19       will cause the next call to return immediately.
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21       Calling this function only guarantees to wake up the  current  (or  the
22       next if there is no current) curl_multi_poll(3) call, which means it is
23       possible that multiple calls to this function will  wake  up  the  same
24       waiting operation.
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26       This function has no effect on curl_multi_wait(3) calls.
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RETURN VALUE

29       CURLMcode type, general libcurl multi interface error code.
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AVAILABILITY

32       Added in 7.68.0
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EXAMPLE

35       CURL *easy_handle;
36       CURLM *multi_handle;
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38       /* add the individual easy handle */
39       curl_multi_add_handle(multi_handle, easy_handle);
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41       /* this is thread 1 */
42       do {
43         CURLMcode mc;
44         int numfds;
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46         mc = curl_multi_perform(multi_handle, &still_running);
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48         if(mc == CURLM_OK) {
49           /* wait for activity, timeout or wakeup */
50           mc = curl_multi_poll(multi_handle, NULL, 0, 10000, &numfds);
51         }
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53         if(time_to_die())
54           exit(1);
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56       } while(still_running);
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58       curl_multi_remove_handle(multi_handle, easy_handle);
59
60       /* this is thread 2 */
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62       if(something makes us decide to stop thread 1) {
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64         set_something_to_signal_thread_1_to_exit();
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66         curl_multi_wakeup(multi_handle);
67       }
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SEE ALSO

71       curl_multi_poll(3), curl_multi_wait(3)
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75libcurl 7.69.1                 November 25, 2019          curl_multi_wakeup(3)
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