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2014-09-02multi: convert CURLM_STATE_CONNECT_PEND handling to a listDaniel Stenberg
... instead of scanning through all handles, stash only the actual handles that are in that state in the new ->pending list and scan that list only. It should be mostly empty or very short. And only used for pipelining. This avoids a rather hefty slow-down especially notable if you add many handles to the same multi handle. Regression introduced in commit 0f147887 (version 7.30.0). Bug: http://curl.haxx.se/mail/lib-2014-07/0206.html Reported-by: David Meyer
2013-08-03multi: rename all Curl_one_easy to SessionHandleDaniel Stenberg
2013-08-03multi: remove 'Curl_one_easy' struct, phase 1Daniel Stenberg
The motivation for having a separate struct that keep track of an easy handle when using the multi handle was removed when we switched to always using the multi interface internally. Now they were just two separate struct that was always allocated for each easy handle. This first step just moves the Curl_one_easy struct members into the SessionHandle struct and hides this somehow (== keeps the source code changes to a minimum) by defining Curl_one_easy to SessionHandle The biggest changes in this commit are: 1 - the linked list of easy handles had to be changed somewhat due to the new struct layout. This made the main linked list pointer get renamed to 'easyp' and there's also a new pointer to the last node, called easylp. It is no longer circular but ends with ->next pointing to NULL. New nodes are still added last. 2 - easy->state is now called easy->mstate to avoid name collision
2013-03-13Multiple pipelines and limiting the number of connections.Linus Nielsen Feltzing
Introducing a number of options to the multi interface that allows for multiple pipelines to the same host, in order to optimize the balance between the penalty for opening new connections and the potential pipelining latency. Two new options for limiting the number of connections: CURLMOPT_MAX_HOST_CONNECTIONS - Limits the number of running connections to the same host. When adding a handle that exceeds this limit, that handle will be put in a pending state until another handle is finished, so we can reuse the connection. CURLMOPT_MAX_TOTAL_CONNECTIONS - Limits the number of connections in total. When adding a handle that exceeds this limit, that handle will be put in a pending state until another handle is finished. The free connection will then be reused, if possible, or closed if the pending handle can't reuse it. Several new options for pipelining: CURLMOPT_MAX_PIPELINE_LENGTH - Limits the pipeling length. If a pipeline is "full" when a connection is to be reused, a new connection will be opened if the CURLMOPT_MAX_xxx_CONNECTIONS limits allow it. If not, the handle will be put in a pending state until a connection is ready (either free or a pipe got shorter). CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE - A pipelined connection will not be reused if it is currently processing a transfer with a content length that is larger than this. CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE - A pipelined connection will not be reused if it is currently processing a chunk larger than this. CURLMOPT_PIPELINING_SITE_BL - A blacklist of hosts that don't allow pipelining. CURLMOPT_PIPELINING_SERVER_BL - A blacklist of server types that don't allow pipelining. See the curl_multi_setopt() man page for details.
2013-01-17always-multi: always use non-blocking internalsDaniel Stenberg
Remove internal separated behavior of the easy vs multi intercace. curl_easy_perform() is now using the multi interface itself. Several minor multi interface quirks and bugs have been fixed in the process. Much help with debugging this has been provided by: Yang Tse