1.\" Copyright (c) 2016 The FreeBSD Foundation, Inc. 2.\" All rights reserved. 3.\" 4.\" This documentation was written by 5.\" Konstantin Belousov <[email protected]> under sponsorship 6.\" from the FreeBSD Foundation. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd May 5, 2020 32.Dt THR_EXIT 2 33.Os 34.Sh NAME 35.Nm thr_exit 36.Nd terminate current thread 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In sys/thr.h 41.Ft void 42.Fn thr_exit "long *state" 43.Sh DESCRIPTION 44.Bf -symbolic 45This function is intended for implementing threading. 46Normal applications should call 47.Xr pthread_exit 3 48instead. 49.Ef 50.Pp 51The 52.Fn thr_exit 53system call terminates the current kernel-scheduled thread. 54.Pp 55If the 56.Fa state 57argument is not 58.Dv NULL , 59the location pointed to by the argument is 60updated with an arbitrary non-zero value, and an 61.Xr _umtx_op 2 62.Dv UMTX_OP_WAKE 63operation is consequently performed on the location. 64.Pp 65Attempts to terminate the last thread in the process are silently ignored. 66Use 67.Xr _exit 2 68syscall to terminate the process. 69.Sh RETURN VALUES 70The function does not return a value. 71A return from the function indicates that the calling thread was the 72last one in the process. 73.Sh SEE ALSO 74.Xr _exit 2 , 75.Xr thr_kill 2 , 76.Xr thr_kill2 2 , 77.Xr thr_new 2 , 78.Xr thr_self 2 , 79.Xr thr_set_name 2 , 80.Xr _umtx_op 2 , 81.Xr pthread_exit 3 82.Sh STANDARDS 83The 84.Fn thr_exit 85system call is non-standard and is used by 86.Lb libthr 87to implement 88.St -p1003.1-2001 89.Xr pthread 3 90functionality. 91.Sh HISTORY 92The 93.Fn thr_exit 94system call first appeared in 95.Fx 5.2 . 96