1.\" Copyright (c) 2003 Alexey Zelkin <phantom@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD$ 26.\" 27.Dd October 12, 2021 28.Dt PTHREAD_MULTI_NP 3 29.Os 30.Sh NAME 31.Nm pthread_multi_np , 32.Nm pthread_single_np 33.Nd "switch between multi- and single-threaded scheduling modes" 34.Sh LIBRARY 35.Lb libpthread 36.Sh SYNOPSIS 37.In pthread_np.h 38.Ft int 39.Fn pthread_multi_np void 40.Ft int 41.Fn pthread_single_np void 42.Sh DESCRIPTION 43The 44.Fn pthread_single_np 45function switches the process to a single-threaded mode, i.e., 46suspends all threads except the current. 47The semantics of this function is similar to 48.Xr pthread_suspend_all_np 3 . 49.Pp 50The 51.Fn pthread_multi_np 52function switches the process to a multi-threaded mode. 53The semantics of this function is similar to 54.Xr pthread_resume_all_np 3 . 55.Sh RETURN VALUES 56The 57.Fn pthread_multi_np 58and 59.Nm pthread_single_np 60functions always return 0. 61.Sh SEE ALSO 62.Xr pthread_np 3 , 63.Xr pthread_resume_all_np 3 , 64.Xr pthread_suspend_all_np 3 65.Sh AUTHORS 66This manual page was written by 67.An Alexey Zelkin Aq Mt phantom@FreeBSD.org . 68