diff options
| author | Daniel Stenberg <daniel@haxx.se> | 2019-02-22 13:44:41 +0100 |
|---|---|---|
| committer | Daniel Stenberg <daniel@haxx.se> | 2019-02-23 23:08:38 +0100 |
| commit | 47e540df8f32c8f7298ab1bc96b0087b5738c257 (patch) | |
| tree | 74c313428b6ab1748ea4f45b6eac2bbf5fbcc71d /docs/libcurl | |
| parent | 42b30ee8f2ed947a288f55ed78c370da10e3dde4 (diff) | |
examples: remove recursive calls to curl_multi_socket_action
From within the timer callbacks. Recursive is problematic for several
reasons. They should still work, but this way the examples and the
documentation becomes simpler. I don't think we need to encourage
recursive calls.
Discussed in #3537
Closes #3601
Diffstat (limited to 'docs/libcurl')
| -rw-r--r-- | docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 b/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 index 778a26c61..d926d811d 100644 --- a/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 +++ b/docs/libcurl/opts/CURLMOPT_TIMERFUNCTION.3 @@ -5,7 +5,7 @@ .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * -.\" * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. +.\" * Copyright (C) 1998 - 2019, 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 @@ -28,7 +28,7 @@ CURLMOPT_TIMERFUNCTION \- set callback to receive timeout values #include <curl/curl.h> int timer_callback(CURLM *multi, /* multi handle */ - long timeout_ms, /* see above */ + long timeout_ms, /* timeout in number of ms */ void *userp); /* private callback pointer */ CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_TIMERFUNCTION, timer_callback); @@ -40,17 +40,15 @@ Certain features, such as timeouts and retries, require you to call libcurl even when there is no activity on the file descriptors. Your callback function \fBtimer_callback\fP should install a non-repeating -timer with an interval of \fBtimeout_ms\fP. Each time that timer fires, call +timer with an interval of \fBtimeout_ms\fP. When time that timer fires, call either \fIcurl_multi_socket_action(3)\fP or \fIcurl_multi_perform(3)\fP, depending on which interface you use. -A \fBtimeout_ms\fP value of -1 means you should delete your timer. +A \fBtimeout_ms\fP value of -1 passed to this callback means you should delete +the timer. All other values are valid expire times in number of milliseconds. -A \fBtimeout_ms\fP value of 0 means you should call -\fIcurl_multi_socket_action(3)\fP or \fIcurl_multi_perform(3)\fP (once) as soon -as possible. - -\fBtimer_callback\fP will only be called when the \fBtimeout_ms\fP changes. +The \fBtimer_callback\fP will only be called when the timeout expire time is +changed. The \fBuserp\fP pointer is set with \fICURLMOPT_TIMERDATA(3)\fP. |