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Daniel Stenberg 2009-11-24 07:40:43 +00:00
parent 405e18571e
commit 88fe6557e9
1 changed files with 12 additions and 19 deletions
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lib/README.multi_socket
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@ -12,14 +12,14 @@ Implementation of the curl_multi_socket API
any other transfers. (The previous API always had to scan through all any other transfers. (The previous API always had to scan through all
the existing transfers.) the existing transfers.)
The idea is that curl_multi_socket() calls a given callback with information The idea is that curl_multi_socket_action() calls a given callback with
about what socket to wait for what action on, and the callback only gets information about what socket to wait for what action on, and the callback
called if the status of that socket has changed. only gets called if the status of that socket has changed.
In the API draft from before, we have a timeout argument on a per socket In the API draft from before, we have a timeout argument on a per socket
basis and we also allowed curl_multi_socket() to pass in an 'easy handle' basis and we also allowed curl_multi_socket_action() to pass in an 'easy
instead of socket to allow libcurl to shortcut a lookup and work on the handle' instead of socket to allow libcurl to shortcut a lookup and work on
affected easy handle right away. Both these turned out to be bad ideas. the affected easy handle right away. Both these turned out to be bad ideas.
The timeout argument was removed from the socket callback since after much The timeout argument was removed from the socket callback since after much
thinking I came to the conclusion that we really don't want to handle thinking I came to the conclusion that we really don't want to handle
@ -54,20 +54,13 @@ Implementation of the curl_multi_socket API
included in the c-ares 1.3.1 release. included in the c-ares 1.3.1 release.
We have done a test runs with up to 9000 connections (with a single active We have done a test runs with up to 9000 connections (with a single active
one). The curl_multi_socket() invoke then takes less than 10 microseconds in one). The curl_multi_socket_action() invoke then takes less than 10
average (using the read-only-1-byte-at-a-time hack). We are now below the microseconds in average (using the read-only-1-byte-at-a-time hack). We are
60 microseconds "per socket action" goal (the extra 50 is the time libevent now below the 60 microseconds "per socket action" goal (the extra 50 is the
needs). time libevent needs).
Status Right Now Documentation
The curl_multi_socket() API is implemented according to how it is http://curl.haxx.se/libcurl/c/curl_multi_socket_action.html
documented. We deem it ready to use.
http://curl.haxx.se/libcurl/c/curl_multi_socket.html
http://curl.haxx.se/libcurl/c/curl_multi_timeout.html http://curl.haxx.se/libcurl/c/curl_multi_timeout.html
http://curl.haxx.se/libcurl/c/curl_multi_setopt.html http://curl.haxx.se/libcurl/c/curl_multi_setopt.html
What is Left for the curl_multi_socket API
Real world usage!