Messages in this thread |  | | | Subject | Re: Process-Shared Mutex (futex) - What is it good for ? | | From | Vladimir Zidar <> | | Date | 11 Jun 2002 19:18:39 +0200 |
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On Tue, 2002-06-11 at 15:19, Peter Wächtler wrote:
> > A-prog: B-prog: > > gets write lock > write some data > block on read lock > write some data > crashes > wants an error indication to repair data magically
B-Prog unblocks, but gets -1, with errno=EPIPE.
> > > So a crashing A-prog is OK for you, but B should get an indication. > Could catch a signal (SIGLOST?) returning -1 with errno=LOCKBROKEN > That would be possible with futex.
Nice if that *would* be possible. But that IS how nutexes are working already.
> That is a case for writing data to a file - what about linked lists > in memory?
Exactly the same. Nutexes are not related to files in any way (other than /dev/nutex descriptor, but that's completly different thing).
-- Bye,
and have a very nice day !
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