SYSMON_TASKQ(9) 					   BSD Kernel Developer's Manual					   SYSMON_TASKQ(9)

NAME

     sysmon_taskq -- general purpose system monitoring task queue

SYNOPSIS

     #include <dev/sysmon/sysmon_taskq.h>

     void
     sysmon_task_queue_preinit(void);

     void
     sysmon_task_queue_init(void);

     void
     sysmon_task_queue_fini(void);

     int
     sysmon_task_queue_sched(u_int pri, void (*func)(void *), void *arg);

DESCRIPTION

     The machine-independent sysmon_taskq provides a simple general purpose task queue.  It can be used to run callbacks that require thread con-
     text, but do not warrant the use of a more fine-grained solution.

     Although the intended usage is related to the context of system monitoring and power management, also other comparable functions are suitable
     for sysmon_taskq.

FUNCTIONS

     The necessary internal data structures are initialized during system startup by sysmon_task_queue_preinit().  Before actual usage, a machine-
     dependent procedure should finish the initialization by calling sysmon_task_queue_init().	This will create a kernel thread that can be later
     halted by sysmon_task_queue_fini().  All scheduled tasks are executed before the queue is halted.

     The sysmon_task_queue_sched() enqueues func to be executed at the priority pri.  If pri is 0, the scheduled function will be placed as the
     last element in the queue.  The single argument passed to func is specified by arg.

RETURN VALUES

     Upon successful completion, sysmon_task_queue_sched() returns 0.  Otherwise, the following error values are returned:

     [EINVAL]  An invalid parameter was specified.

     [ENOMEM]  There was not enough memory.

SEE ALSO

     queue(3), kthread(9), workqueue(9)

AUTHORS

     Jason R. Thorpe <thorpej@NetBSD.org>

BSD
								 January 24, 2010							       BSD