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-independentsysmon_taskq 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.
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
AUTHORS
Jason R. Thorpe <thorpej@NetBSD.org>