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.Dd October 12, 2021 26.Dt PTHREAD_MULTI_NP 3 27.Os 28.Sh NAME 29.Nm pthread_multi_np , 30.Nm pthread_single_np 31.Nd "switch between multi- and single-threaded scheduling modes" 32.Sh LIBRARY 33.Lb libpthread 34.Sh SYNOPSIS 35.In pthread_np.h 36.Ft int 37.Fn pthread_multi_np void 38.Ft int 39.Fn pthread_single_np void 40.Sh DESCRIPTION 41The 42.Fn pthread_single_np 43function switches the process to a single-threaded mode, i.e., 44suspends all threads except the current. 45The semantics of this function is similar to 46.Xr pthread_suspend_all_np 3 . 47.Pp 48The 49.Fn pthread_multi_np 50function switches the process to a multi-threaded mode. 51The semantics of this function is similar to 52.Xr pthread_resume_all_np 3 . 53.Sh RETURN VALUES 54The 55.Fn pthread_multi_np 56and 57.Nm pthread_single_np 58functions always return 0. 59.Sh SEE ALSO 60.Xr pthread_np 3 , 61.Xr pthread_resume_all_np 3 , 62.Xr pthread_suspend_all_np 3 63.Sh AUTHORS 64This manual page was written by 65.An Alexey Zelkin Aq Mt phantom@FreeBSD.org . 66