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