1.\" $FreeBSD: src/lib/libc/sys/sched_yield.2,v 1.2.2.8 2001/12/14 18:34:01 ru Exp $ 2.\" Copyright (c) 1998 HD Associates, Inc. 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.Dd March 12, 1998 27.Dt SCHED_YIELD 2 28.Os 29.Sh NAME 30.Nm sched_yield 31.Nd yield processor 32.Sh LIBRARY 33.Lb libc 34.Sh SYNOPSIS 35.In sched.h 36.Ft int 37.Fn sched_yield void 38.Sh DESCRIPTION 39The 40.Fn sched_yield 41function forces the running process to relinquish the processor until it 42again becomes the head of its process list. It takes no arguments. 43.Sh RETURN VALUES 44.Rv -std sched_yield 45.Sh ERRORS 46On failure 47.Va errno 48will be set to the corresponding value: 49.Bl -tag -width Er 50.It Bq Er ENOSYS 51The system is not configured to support this functionality. 52.El 53.Sh STANDARDS 54The 55.Fn sched_yield 56function conforms to 57.St -p1003.1b-93 . 58