96 lines
3.1 KiB
Groff
96 lines
3.1 KiB
Groff
.\" $NetBSD: cpu_exit.9,v 1.8 2003/08/23 23:29:54 wiz Exp $
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.\"
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gregory McGarry.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 23, 2003
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.Dt CPU_EXIT 9
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.Os
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.Sh NAME
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.Nm cpu_exit
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.Nd machine-dependent process exit
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.Sh SYNOPSIS
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.In sys/systm.h
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.Ft void
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.Fn cpu_exit "struct lwp *l" "int is_process"
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.Sh DESCRIPTION
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.Fn cpu_exit
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is machine-dependent code invoked by
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.Fn exit1
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or
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.Fn lwp_exit
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as the last action during process or lwp exit to switch to a new context
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(possibly the idle context).
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.Fn cpu_exit
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will clean up machine-dependent process state.
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If
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.Fa is_process
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is 0, we're exiting an lwp.
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In that case,
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.Fn cpu_exit
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only does lwp-appropriate cleanup.
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.Fn cpu_exit
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will then invoke
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.Fn exit2
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or
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.Fn lwp_exit2
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to schedule the old lwp's u-area and stack to be released by the
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reaper thread.
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.Fn cpu_exit
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will then invoke an equivalent of
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.Fn cpu_switch
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to wait for another process to wake up.
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.Sh CODE REFERENCES
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This section describes places within the
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.Nx
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source tree where actual code using
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.Fn cpu_exit
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be found.
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All pathnames are relative to
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.Pa /usr/src .
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.Pp
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.Fn exit1
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and
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.Fn exit2
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can be found within the file
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.Pa sys/kern/kern_exit.c .
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.Pp
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.Fn lwp_exit
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and
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.Fn lwp_exit2
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can be found within the file
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.Pa sys/kern/kern_lwp.c .
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.Sh SEE ALSO
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.Xr cpu_switch 9
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