On 8 Nov 2009, at 17:47, Constantine Sapuntzakis wrote:
Does this patch fix Multi-threading problems on OSX 10.6 even if c-
ares is
being used?
This will probably not fix your problems unless you were compiling
libcurl with --disable-ipv6.
As I've integrated libcurl into a multi-threaded program, I've found
I've had to do a couple things to ensure thread safety:
* when I create a curl object in a thread (e.g. multi handle, easy
handle), I only use it and destroy it in that thread
* Add locking callbacks so that the DNS hostcache is thread safe:
curl_share_setopt(g_sh, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
curl_share_setopt(g_sh, CURLSHOPT_LOCKFUNC, sh_lock);
curl_share_setopt(g_sh, CURLSHOPT_UNLOCKFUNC, sh_unlock);
* Use CRYPTO_set_locking_callback to register a lock callback with
OpenSSL so OpenSSL is thread safe.
What sort of problems are you running into?
-Costa
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Hi Costa,
I launch a lot of connections at the same time, each easy handle is
created and destroyed
in its own pthread and it works flawlessly until I increase the number
of connections to
about 20 or above and then curl_easy_perform starts returning error 7
on all new handles.
I have been configuring libcurl with:
./configure --enable-ares
Having read your emails should I also be setting --enable-thread and --
enable-nonblocking?
Regards,
Rob.
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