From 139202bb68dcccd01eab031db5b331db1f999d3b Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Fri, 3 May 2019 15:44:49 +0200 Subject: CURLMOPT_TIMERFUNCTION.3: warn about the recursive risk [ci skip] Reported-by: Ricardo Gomes Bug: #3537 Closes #3836 --- docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'docs/libcurl') diff --git a/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 b/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 index d926d811d..344813fe8 100644 --- a/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 +++ b/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 @@ -54,6 +54,11 @@ The \fBuserp\fP pointer is set with \fICURLMOPT_TIMERDATA(3)\fP. The timer callback should return 0 on success, and -1 on error. This callback can be used instead of, or in addition to, \fIcurl_multi_timeout(3)\fP. + +\fBWARNING:\fP even if it feels tempting, avoid calling libcurl directly from +within the callback itself when the \fBtimeout_ms\fP value is zero, since it +risks triggering an unpleasant recursive behavior that immediately calls +another call to the callback with a zero timeout... .SH DEFAULT NULL .SH PROTOCOLS -- cgit v1.2.3