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progress callback: can be called more than once per sec

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Daniel Stenberg 2010-04-26 15:37:39 +02:00
parent 107146676e
commit 2c1b0624ac
1 changed files with 5 additions and 5 deletions
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10
docs/libcurl/curl_easy_setopt.3
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@ -246,11 +246,11 @@ argument in the opensocket callback set with \fICURLOPT_OPENSOCKETFUNCTION\fP.
Function pointer that should match the \fIcurl_progress_callback\fP prototype
found in \fI<curl/curl.h>\fP. This function gets called by libcurl instead of
its internal equivalent with a frequent interval during operation (roughly
once per second) no matter if data is being transfered or not. Unknown/unused
argument values passed to the callback will be set to zero (like if you only
download data, the upload size will remain 0). Returning a non-zero value from
this callback will cause libcurl to abort the transfer and return
\fICURLE_ABORTED_BY_CALLBACK\fP.
once per second or sooner) no matter if data is being transfered or not.
Unknown/unused argument values passed to the callback will be set to zero
(like if you only download data, the upload size will remain 0). Returning a
non-zero value from this callback will cause libcurl to abort the transfer and
return \fICURLE_ABORTED_BY_CALLBACK\fP.
If you transfer data with the multi interface, this function will not be
called during periods of idleness unless you call the appropriate libcurl