From 02346abc32a3995299fa9c2f35b9f0a1d091b045 Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Mon, 29 Jul 2019 13:41:00 +0200 Subject: curl_multi_poll: a sister to curl_multi_wait() that waits more Repeatedly we see problems where using curl_multi_wait() is difficult or just awkward because if it has no file descriptor to wait for internally, it returns immediately and leaves it to the caller to wait for a small amount of time in order to avoid occasional busy-looping. This is often missed or misunderstood, leading to underperforming applications. This change introduces curl_multi_poll() as a replacement drop-in function that accepts the exact same set of arguments. This function works identically to curl_multi_wait() - EXCEPT - for the case when there's nothing to wait for internally, as then this function will by itself wait for a "suitable" short time before it returns. This effectiely avoids all risks of busy-looping and should also make it less likely that apps "over-wait". This also changes the curl tool to use this funtion internally when doing parallel transfers and changes curl_easy_perform() to use it internally. Closes #4163 --- tests/data/test1135 | 1 + 1 file changed, 1 insertion(+) (limited to 'tests/data/test1135') diff --git a/tests/data/test1135 b/tests/data/test1135 index 3591a543b..eca6860fb 100644 --- a/tests/data/test1135 +++ b/tests/data/test1135 @@ -91,6 +91,7 @@ CURL_EXTERN CURLMcode curl_multi_add_handle(CURLM *multi_handle, CURL_EXTERN CURLMcode curl_multi_remove_handle(CURLM *multi_handle, CURL_EXTERN CURLMcode curl_multi_fdset(CURLM *multi_handle, CURL_EXTERN CURLMcode curl_multi_wait(CURLM *multi_handle, +CURL_EXTERN CURLMcode curl_multi_poll(CURLM *multi_handle, CURL_EXTERN CURLMcode curl_multi_perform(CURLM *multi_handle, CURL_EXTERN CURLMcode curl_multi_cleanup(CURLM *multi_handle); CURL_EXTERN CURLMsg *curl_multi_info_read(CURLM *multi_handle, -- cgit v1.2.3