Registered: Jan 2002
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Posts: 2291

Niels Provos says this is a heads up for the upcoming integration of libevent into the NetBSD source tree. Libevent provides a simple API to abstract event notification and handling. Applications are notified via callbacks on IO events, timers and signals. Libevent is meant to replace the event loop found in event driven software.

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Subject: heads up: libevent integration
To: None <tech-userlevel@netbsd.org>
From: Niels Provos <provos@citi.umich.edu>
List: tech-userlevel
Date: 06/08/2003 17:37:44

Hi,

this is a heads up for the upcoming integration of libevent into the
tree.

Libevent provides a simple API to abstract event notification and
handling. Applications are notified via callbacks on IO events,
timers and signals. Libevent is meant to replace the event loop found
in event driven software. It automatically picks the best underlying
operating system primitive. In the case of NetBSD, this is kqueue(2)
with poll(2) as a fall back.

The code is small and has been used by many people over the years to
implement event driven software. You can find all the information at

http://www.monkey.org/~provos/libevent/

The page includes screenshots that show performance comparisons
between kqueue and poll. Any application that is written towards
libevent automatically makes use of the fastest available primitive.

The signal callbacks allow an application to call all libc functions
without having to worry about reliability and security of signal
handlers, which usually allow only a small subset of safe functions.

Niels.

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Registered: Jun 2002
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Posts: 1231

it's been on openbsd for some time, and it's really nice to work with. unfortunately openbsd is still using libevent 0.5, while the latest version is 0.7 (there were some performance improvements, iirc).

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Registered: Jun 2002
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Posts: 2

Actually, OpenBSD has 0.6. You probably saw the 0.5 in the configure script and jumped to that conclusion.

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Registered: Jun 2002
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Posts: 1231

yep, that was it. do you know the reason for not updating the version on the configure script?

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