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93 lines
2.7 KiB
Groff
93 lines
2.7 KiB
Groff
.\" Copyright (c) 2016 The FreeBSD Foundation
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.\"
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.\" This documentation was written by
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.\" Konstantin Belousov <kib@FreeBSD.org> under sponsorship
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.\" from the FreeBSD Foundation.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd May 5, 2020
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.Dt THR_EXIT 2
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.Os
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.Sh NAME
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.Nm thr_exit
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.Nd terminate current thread
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/thr.h
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.Ft void
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.Fn thr_exit "long *state"
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.Sh DESCRIPTION
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.Bf -symbolic
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This function is intended for implementing threading.
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Normal applications should call
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.Xr pthread_exit 3
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instead.
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.Ef
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.Pp
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The
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.Fn thr_exit
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system call terminates the current kernel-scheduled thread.
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.Pp
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If the
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.Fa state
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argument is not
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.Dv NULL ,
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the location pointed to by the argument is
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updated with an arbitrary non-zero value, and an
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.Xr _umtx_op 2
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.Dv UMTX_OP_WAKE
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operation is consequently performed on the location.
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.Pp
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Attempts to terminate the last thread in the process are silently ignored.
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Use
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.Xr _exit 2
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syscall to terminate the process.
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.Sh RETURN VALUES
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The function does not return a value.
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A return from the function indicates that the calling thread was the
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last one in the process.
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.Sh SEE ALSO
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.Xr _exit 2 ,
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.Xr _umtx_op 2 ,
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.Xr thr_kill 2 ,
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.Xr thr_kill2 2 ,
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.Xr thr_new 2 ,
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.Xr thr_self 2 ,
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.Xr thr_set_name 2 ,
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.Xr pthread_exit 3
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.Sh STANDARDS
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The
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.Fn thr_exit
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system call is non-standard and is used by
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.Lb libthr
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to implement
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.St -p1003.1-2001
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.Xr pthread 3
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functionality.
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.Sh HISTORY
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The
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.Fn thr_exit
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system call first appeared in
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.Fx 5.2 .
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