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+.\" Copyright (c) 2005 Robert N. M. Watson
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd October 19, 2007
+.Dt LIBTHR 3
+.Os
+.Sh NAME
+.Nm libthr
+.Nd "1:1 POSIX threads library"
+.Sh LIBRARY
+.Lb libthr
+.Sh SYNOPSIS
+.In pthread.h
+.Sh DESCRIPTION
+The
+.Nm
+library provides a 1:1 implementation of the
+.Xr pthread 3
+library interfaces for application threading.
+It
+has been optimized for use by applications expecting system scope thread
+semantics, and can provide significant performance improvements
+compared to
+.Lb libkse .
+.Sh SEE ALSO
+.Xr pthread 3
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+library
+was originally created by
+.An "Jeff Roberson" Aq jeff@FreeBSD.org ,
+and enhanced by
+.An "Jonathan Mini" Aq mini@FreeBSD.org
+and
+.An "Mike Makonnen" Aq mtm@FreeBSD.org .
+It has been substantially rewritten and optimized by
+.An "David Xu" Aq davidxu@FreeBSD.org .