Hi, On Wed, Oct 29, 2003 at 05:15:52PM +0100, Gerhard Jaeger wrote: > > At least on Linux, it does not work perfectly (cancelling leads to segfaults > > sometimes).
The segafults appear to happen after exiting xsane only so it's not that bad. > As I stated in my former mails, when using pthreads and the canceling > mechanism, one should in general try and let the thread die gracefully. > Which leads to some command exchange mechanism i.e. > The "cancel"-command sets a variable, that will be checked by the > reader thread. If detected active, the reader thread stops its acitivity > and exists. Doing this the hard-way via pthread_cancel it might be, that > you run into trouble. > One thing you can test is: > comment out the line with pthread_setcanceltype (should be 201), recompile > and check if the segfault behaviour is better... Thanks. When there is more time I'll try. I think there is trouble with cancelling the SCSI commands while using threads but I'm not sure yet. Bye, Henning
