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Revision 1.8, Tue Mar 18 18:20:40 2014 UTC (10 years ago) by riastradh
Branch: MAIN
CVS Tags: yamt-pagecache-base9, tls-maxphys-base, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-3-RELEASE, netbsd-9-2-RELEASE, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, matt-nb8-mediatek-base, matt-nb8-mediatek, localcount-20160914, is-mlppp-base, is-mlppp, cjep_sun2x-base1, cjep_sun2x-base, cjep_sun2x, cjep_staticlib_x-base1, cjep_staticlib_x-base, cjep_staticlib_x, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan
Changes since 1.7: +1 -1 lines

Merge riastradh-drm2 to HEAD.

.\" $NetBSD: sysmon_taskq.9,v 1.8 2014/03/18 18:20:40 riastradh Exp $
.\"
.\" Copyright (c) 2010 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Jukka Ruohonen.
.\"
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.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
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.\"
.Dd January 24, 2010
.Dt SYSMON_TASKQ 9
.Os
.Sh NAME
.Nm sysmon_taskq
.Nd general purpose system monitoring task queue
.Sh SYNOPSIS
.In dev/sysmon/sysmon_taskq.h
.Ft void
.Fn sysmon_task_queue_preinit "void"
.Ft void
.Fn sysmon_task_queue_init "void"
.Ft void
.Fn sysmon_task_queue_fini "void"
.Ft int
.Fn sysmon_task_queue_sched "u_int pri" "void (*func)(void *)" "void *arg"
.Sh DESCRIPTION
The machine-independent
.Nm
provides a simple general purpose task queue.
It can be used to run callbacks that require thread context,
but do not warrant the use of a more fine-grained solution.
.Pp
Although the intended usage is related to the context of system monitoring
and power management, also other comparable functions are suitable for
.Nm .
.Sh FUNCTIONS
The necessary internal data structures
are initialized during system startup by
.Fn sysmon_task_queue_preinit .
Before actual usage, a machine-dependent
procedure should finish the initialization
by calling
.Fn sysmon_task_queue_init .
This will create a kernel thread that can be later halted by
.Fn sysmon_task_queue_fini .
All scheduled tasks are executed before the queue is halted.
.Pp
The
.Fn sysmon_task_queue_sched
enqueues
.Fa func
to be executed at the priority
.Fa pri .
If
.Fa pri
is 0, the scheduled function will be placed as the last element in the queue.
The single argument passed to
.Fa func
is specified by
.Fa arg .
.Sh RETURN VALUES
Upon successful completion,
.Fn sysmon_task_queue_sched
returns 0.
Otherwise, the following error values are returned:
.Bl -tag -width [EINVAL]
.It Bq Er EINVAL
An invalid parameter was specified.
.It Bq Er ENOMEM
There was not enough memory.
.El
.Sh SEE ALSO
.Xr queue 3 ,
.Xr kthread 9 ,
.Xr workqueue 9
.Sh AUTHORS
.An Jason R. Thorpe Aq Mt thorpej@NetBSD.org