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curl_multi_perform.3: added example

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Daniel Stenberg 2015-06-02 12:13:23 +02:00
parent 3cac8c9049
commit 46a050e9f5
1 changed files with 50 additions and 1 deletions
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51
docs/libcurl/curl_multi_perform.3
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@ -5,7 +5,7 @@
.\" * | (__| |_| | _ <| |___
.\" * \___|\___/|_| \_\_____|
.\" *
.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@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
@ -49,6 +49,55 @@ added handle fails very quickly, it may never be counted as a running_handle.
When \fIrunning_handles\fP is set to zero (0) on the return of this function,
there is no longer any transfers in progress.
.SH EXAMPLE
.nf
#ifdef _WIN32
#define SHORT_SLEEP Sleep(100)
#else
#define SHORT_SLEEP usleep(100000)
#endif
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo;
curl_multi_timeout(multi_handle, &curl_timeo);
if(curl_timeo < 0)
curl_timeo = 1000;
timeout.tv_sec = curl_timeo / 1000;
timeout.tv_usec = (curl_timeo % 1000) * 1000;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
/* get file descriptors from the transfers */
mc = curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
if(maxfd == -1) {
SHORT_SLEEP;
rc = 0;
}
else
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
switch(rc) {
case -1:
/* select error */
break;
case 0:
default:
/* timeout or readable/writable sockets */
curl_multi_perform(multi_handle, &still_running);
break;
}
/* if there are still transfers, loop! */
.fi
.SH "RETURN VALUE"
CURLMcode type, general libcurl multi interface error code.