**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel (at] haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
**************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel (at] haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
**************************************************************************
curl_multi_wait 3 "12 Jul 2012" "libcurl 7.28.0" "libcurl Manual"
NAME
curl_multi_wait - polls on all easy handles in a multi handle
SYNOPSIS
#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); .adDESCRIPTIONcurl_multi_wait(3) polls all file descriptors used by the curl easy handles 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 passed. Alternatively, if the multi handle has a pending internal timeout that has a shorter expiry time than timeout_ms, that shorter time will be used instead to make sure timeout accuracy is reasonably kept. 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 non-NULL, it will be populated with the total number of file descriptors on which interesting events occurred. This number can include both libcurl internal descriptors as well as descriptors provided in extra_fds. 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 common problem with 1024 maximum file descriptors.curl_waitfdstruct curl_waitfd { curl_socket_t fd; short events; short revents; };CURL_WAIT_POLLINBit flag to curl_waitfd.events indicating the socket should poll on read events such as new data received.CURL_WAIT_POLLPRIBit flag to curl_waitfd.events indicating the socket should poll on high priority read events such as out of band data.CURL_WAIT_POLLOUTBit flag to curl_waitfd.events indicating the socket should poll on write events such as the socket being clear to write without blocking.RETURN VALUECURLMcode type, general libcurl multi interface error code. See libcurl-errors(3)AVAILABILITYThis function was added in libcurl 7.28.0."SEE ALSO"curl_multi_fdset "(3), " curl_multi_perform "(3)"
