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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html><head>
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<title>liboop home page</title>
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<link rel="stylesheet" type="text/css" href="style.css">
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</head><body>
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<img src="logo" alt="liboop" width=202 height=50>
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<p>
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Liboop is a low-level event loop management library for POSIX-based operating
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systems.  It supports the development of modular, multiplexed applications
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which may respond to events from several sources.  It replaces the "select()
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loop" and allows the registration of event handlers for file and network I/O,
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timers and signals.  Since processes use these mechanisms for almost all
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external communication, liboop can be used as the basis for almost any
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application.
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<p>
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Liboop is licensed under the
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<a href="http://www.fsf.org/copyleft/lesser.html">Lesser General Public
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License</a>.
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<p>
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Similar free software includes the GLib <a
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href="http://developer.gnome.org/doc/API/glib/glib-the-main-event-loop.html">Main
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Event Loop</a>, Niels Provos' <a href="http://www.monkey.org/~provos/libevent/">libevent</a>, and (for Perl) <a href="http://poe.perl.org/">POE</a>.
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Refer to the <a href="why#glib">rationale</a> for a detailed comparison.
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<p>
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Software which uses or supports liboop includes
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<a href="http://www.lysator.liu.se/~nisse/lsh/">lsh</a>,
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<a href="http://www.nongnu.org/ruli/">RULI</a>,
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<a href="http://www.lysator.liu.se/lyskom/lyskom-server/">lyskom-server</a>,
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<a href="http://gale.org/">Gale</a> and
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<a href="http://gdn.berlios.de/">GDN</a>.  (Let me know if I'm missing any.)
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<h3>Download.</h3>
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Get the
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<a href="http://download.ofb.net/liboop/liboop.tar.gz">latest version</a>.
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Read the included INSTALL file.
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<p>
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You may also browse the CVS repository for
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<a href="http://liboop.org/cvs/gale/liboop/">source code</a> or
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<a href="http://liboop.org/cvs/liboop.org/">documentation</a>.
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<h3>Documentation.</h3>
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<dl>
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<dt><a href="why">Extended rationale</a>
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<dd>Why everyone should be using liboop.
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<dt><a href="how">Introduction and overview</a>
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<dd>How liboop works; basic principles of operation.
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<dt><a href="ref">Reference</a>
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<dd>Specific functions and data structures.
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</dl>
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<h3>News.</h3>
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<dl>
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<dt>27 October 2003
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<dd>Version 1.0 released.  (The number has no special meaning, it's just
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the next increment.)  The build is little more robust now, and you can enable
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and disable specific adapters in the configure script.  The ADNS adapter
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returns error messages, the GLib adapter works with GLib 2, and there's a
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new oop_sys_run_once() function so you can poll an event source.<p>
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<dt>11 January 2003
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<dd>Version 0.9 released.  A memory leak when creating and destroying the
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system event source was fixed, the robustness of signal handling is improved,
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and some minor portability problems were fixed.<p>
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<dt>18 September 2001
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<dd>Version 0.8 released, including a <a href="oop_tcl">source adapter</a>
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for <a href="http://www.purl.org/tcl/home/">Tcl/Tk</a>.  (0.7 was never
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announced.)<p>
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<dt>7 October 2000
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<dd>Version 0.6 released, including a <a href="oop_rl">sink adapter</a>
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for the <a href="http://cnswww.cns.cwru.edu/~chet/readline/rltop.html">GNU
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Readline Library</a>.<p>
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<dt>5 September 1999
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<dd>Version 0.4 released.  Besides the usual bug fixes, the
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<a href="on_fd">file descriptor deregistration interface</a> changed, and we
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now have a <a href="oop_glib">source adapter</a> for
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<a href="http://gtk.org/">GLib</a>, and a <a href="oop_www">sink adapter</a>
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for the <a href="http://www.w3.org/Library/">W3C Protocol Library
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(libwww)</a>!  The test/sample program (test-oop) is also quite improved.<p>
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<dt>15 August 1999
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<dd>Version 0.3 released.  This version includes an
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<a href="oop_adns">adapter</a> for
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<a href="http://www.chiark.greenend.org.uk/~ian/adns/">Ian Jackson's
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asynchronous DNS resolver library</a>.<p>
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<em>Note that while liboop is
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covered by the lesser GPL, ADNS is covered by the <strong>full GPL</strong>,
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and therefore any program which uses ADNS with (or without) liboop must
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support distribution under the terms of the full GPL.</em><p>
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<dt>1 August 1999
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<dd>Version 0.2 released.  This release fixes several bugs, uses
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<a href="http://www.gnu.org/software/autoconf/autoconf.html">autoconf</a>,
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<a href="http://www.gnu.org/software/automake/automake.html">automake</a> and
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<a href="http://www.gnu.org/software/libtool/libtool.html">libtool</a>,
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and includes an interface for using
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<a href="alloc">alternate memory allocation functions</a>.
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<a href="">Gale</a> now uses liboop!<p>
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<dt>5 July 1999
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<dd>Version 0.1 released.  This is a very, very simple initial release that
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should nevertheless work as a functional event loop.  No adapters are included
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yet.  Testing is minimal, but give it a whirl!
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</dl>
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<hr><a href="http://ofb.net/~egnor/">Dan Egnor</a> (egnor
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@
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ofb.net)</body></html>