On Mon, 1 Aug 2011 20:50:29 +0200 Juan Jose Garcia-Ripoll <juanjose.garciarip...@googlemail.com> wrote:
> So it seems we are pretty safe. Surprising how thread-friendly Lisp can be, even if the standard didn't have a word on it, largely because of the way dynamic scope works. Thanks for your time in helping with the audit. The signal and debugger handling seem to remain tricky parts: BTW, is there a facility already present in ECL so that I can in the top-level decide which unix signal to ignore (a-la sigaction(2) SIG_IGN), and block/unblock it on a per-thread basis (i.e. a-la pthread_sigmask(3))? Or must my code use inline C as necessary to do this? I guess that such code would have no relevance on non-POSIX OSs though... The problem for instance is in a test multithreaded server where SIGPIPE generated from child threads can often be handled properly in those threads, but the signal occasionally also is caught by other unrelated threads (POSIX signals may interrupt any thread in the process which doesn't block it), such as SWANK's, while it shouldn't. Example code is there: http://cvs.pulsar-zone.net/cgi-bin/cvsweb.cgi/mmondor/mmsoftware/cl/test/ecl-server2.lisp?rev=1.16;content-type=text%2Fplain I looked a bit at the related code but didn't see an obvious facility for user code to use so far. Since I do not control the top-level of SWANK, it'd require SWANK changes to ignore such exceptions. Actually, even if ECL provided the necessary facilities, unless they can be applied from ~/.eclrc before launching SWANK, it would still need modifications. In this particular case, of course it'd be possible to use SOCKET-SEND instead with a MSG_NOSIGNAL flag, and/or use polling, but this example illustrates well the issue as-is. Thanks, -- Matt ------------------------------------------------------------------------------ BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos & much more. Register early & save! http://p.sf.net/sfu/rim-blackberry-1 _______________________________________________ Ecls-list mailing list Ecls-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ecls-list
