curl_multi_wait man page on Oracle

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curl_multi_wait(3)		libcurl Manual		    curl_multi_wait(3)

       curl_multi_wait - polls on all easy handles in a multi handle

       #include <curl/curl.h>

       CURLMcode curl_multi_wait(CURLM *multi_handle,
				 struct curl_waitfd extra_fds[],
				 unsigned int extra_nfds,
				 int timeout_ms,
				 int *numfds);

       This  function polls on all file descriptors used by the curl easy han‐
       dles contained in the given multi handle	 set.	It  will  block	 until
       activity	 is  detected on at least one of the handles or timeout_ms has

       The calling application	may  pass  additional  curl_waitfd  structures
       which  are similar to poll(2)'s pollfd structure to be waited on in the
       same call.

       On completion, if numfds is supplied, it will  be  populated  with  the
       number of file descriptors on which interesting events occured.

       If  no  extra  file  descriptors	 are  provided and libcurl has no file
       descriptor to offer to wait for, this function will return immediately.

       This function is encouraged to be used instead of select(3) when	 using
       the multi interface to allow applications to easier circumvent the com‐
       mon problem with 1024 maximum file descriptors.

       struct curl_waitfd {
	 curl_socket_t fd;
	 short events;
	 short revents;

	      Bit flag to indicating the socket should poll
	      on read events such as new data received.

	      Bit flag to indicating the socket should poll
	      on high priority read events such as out of band data.

	      Bit flag to indicating the socket should poll
	      on  write events such as the socket being clear to write without

       CURLMcode  type,	 general  libcurl  multi  interface  error  code.  See

       This function was added in libcurl 7.28.0.

       curl_multi_fdset(3), curl_multi_perform(3)

libcurl 7.28.0			  12 Jul 2012		    curl_multi_wait(3)

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