63 lines
2.1 KiB
Groff
63 lines
2.1 KiB
Groff
.\" $FreeBSD$
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.\" Copyright (c) 1998 HD Associates, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd March 12, 1998
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.Dt SCHED_YIELD 2
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.Os BSD 4
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.Sh NAME
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.Nm sched_yield
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.Nd yield processor
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.Fd #include <sched.h>
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.Ft int
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.Fn sched_yield void
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.Sh DESCRIPTION
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The
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.Fn sched_yield
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function forces the running process to relinquish the processor until it
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again becomes the head of its process list. It takes no arguments.
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.Sh RETURN VALUES
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The
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.Fn sched_yield
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function will return zero if it completes successfully, or it
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will return a value of -1 and set
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.Va errno
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to indicate the error.
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.Sh ERRORS
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On failure
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.Va errno
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will be set to the corresponding value:
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.Bl -tag -width Er
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.It Bq Er ENOSYS
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The system is not configured to support this functionality.
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.El
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.Sh STANDARDS
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The
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.Fn sched_yield
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function conforms to
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.St -p1003.1b-93 .
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