On Wed, 4 Dec 2019, Sean Burford via curl-library wrote:
Reading the man page
<https://curl.haxx.se/libcurl/c/CURLMOPT_TIMERFUNCTION.html>, it looks like
calls to the timer function request a single shot timer. Your description
makes it sound like you set up a periodic timer that fires every timeout_ms
milliseconds. It shouldn't be necessary for curl to provide a -1
cancellation because the timer was meant to be a single shot, it's only
specified to fire once.
That's exactly right. The man page calls it "a non-repeating timer". A timeout
value 0 then means fire ONCE right away. -1 means cancel the current existing
timer and all other (positive) values means fire off a single-time timer in
this many milliseconds.
The example on the man page may be a source of confusion.
Yah, I'm not overly happy with that one. If someone can come up with a nicer
and cleaner example to use there, I'm interested!
--
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