From: "Christian Hoene" <christian.hoene@symonics.com>
To: <sox-devel@lists.sourceforge.net>
Subject: Re: Sox with multiple threads?
Date: Tue, 6 Aug 2013 03:34:55 +0200 [thread overview]
Message-ID: <000601ce9245$28e30b50$7aa921f0$@symonics.com> (raw)
In-Reply-To: <20130805192909.Horde.shFoKtY3aZLr6gNjs7trXw2@webmail.df.eu>
Danke!
-----Ursprüngliche Nachricht-----
Von: Ulrich Klauer [mailto:ulrich@chirlu.de]
Gesendet: Montag, 5. August 2013 19:29
An: sox-devel@lists.sourceforge.net
Betreff: Re: [SoX-devel] Sox with multiple threads?
Christian Hoene wrote:
> One question. Is sox reentrant. Can I fork a sox program and run two
> sox chains in parallel?
When you call fork(), the address space is duplicated, so unless there are
already open files, the processes are completely independent.
Re-entrancy, on the other hand, is hardly relevant.
I guess what you really mean is thread safety. Unfortunately, libSoX uses
some global state and is thus not completely thread-safe; even running two
different chains in parallel in a single thread may lead to problems.
However, if you
a) use the same settings (buffer size etc.) for all chains,
b) don't rely on the "subsystem" information in the message handler (either
set verbosity to 0 or use a custom handler that doesn't read the subsystem
value),
c) don't mind a bit of extra randomness (read: race conditions) in the
pseudo-random number generator, then it will probably work.
Ulrich
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prev parent reply other threads:[~2013-08-05 19:57 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-04 16:09 Sox with multiple threads? Christian Hoene
2013-08-05 17:29 ` Ulrich Klauer
2013-08-06 1:34 ` Christian Hoene [this message]
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