1.\" $NetBSD: sa_enable.2,v 1.5 2022/03/13 17:50:54 andvar Exp $ 2.\" 3.\" Copyright (c)2004 YAMAMOTO Takashi, 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" ------------------------------------------------------------ 28.Dd March 14, 2004 29.Dt SA_ENABLE 2 30.Os 31.Sh NAME 32.Nm sa_enable 33.Nd enable scheduler activation 34.\" ------------------------------------------------------------ 35.Sh LIBRARY 36.Lb libc 37.\" ------------------------------------------------------------ 38.Sh SYNOPSIS 39.In sa.h 40.Ft int 41.Fn sa_enable 42.\" ------------------------------------------------------------ 43.Sh DESCRIPTION 44.Fn sa_enable 45is used to enable scheduler activation. 46.Pp 47An upcall handler and upcall stacks should be registered with 48.Fn sa_register 49and 50.Fn sa_stacks 51beforehand. 52.\" ------------------------------------------------------------ 53.Sh RETURN VALUES 54On success, 55.Fn sa_enable 56will not return to userland in the normal way. 57It returns into the upcall handler with an 58.Dv SA_UPCALL_NEWPROC 59upcall. 60Otherwise, a value of \-1 is returned and 61.Va errno 62is set to indicate the error. 63.\" ------------------------------------------------------------ 64.Sh SEE ALSO 65.Xr sa_register 2 , 66.Xr sa_stacks 2 , 67.Xr pthread 3 68