> I've now added this check, and apr_pollset_create is returning
> APR_SUCCESS
>
> The seg fault only occurs after the first socket is added to the
> pollset, maybe there is another place where return
> codes are ignored?
>
>
> Hmmm... I see that poll() or select()-based pollset
> implementations return APR_ENOTIMPL when
> APR_POLLSET_THREADSAFE is spectified, and I don't know how
> Windows could use anything else under the covers ;)
>
This is the revised code, I now get my segfault on the
err_msg("apr_pollset_create success"):
/* Create my incoming pollset */
status = apr_pollset_create(&listen_channels, total_listen_channels,
global_context, APR_POLLSET_THREADSAFE);
if(status != APR_SUCCESS)
{
err_msg("apr_pollset_create failed: %s");
exit(1);
}
err_msg("apr_pollset_create success");
> my modules start threads. One of them, which works on Linux and
> Solaris, uses libcurl from another thread, and I was
> getting crashes
> until I added APR_POLLSET_THREADSAFE. Now I want to
> run the same code
> under Cygwin.
>
>
> Weird... I would expect that APR_POLLSET_THREADSAFE is only
> needed with use of the SAME pollset on multiple threads, and
> using libcurl from another thread wouldn't affect Ganglia's
> use of its own pollset.
>
> Sorry!
>
>
> I have tested this with apr-1.2.7 under Cygwin now, it
> also has the same
> issue.
>
>
> Did apr-1.2.x even know about APR_POLLSET_THREADSAFE?
>
I've just been referring to the online API docs, I didn't see version
information for this feature.
However, it definitely makes a differences if it is enabled or not. If
I don't have this option, then gmond dies with SIGPIPE, usually at the
time when it receives an incoming TCP connection and starts writing the
response.
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