wdog_register man page on OpenBSD

wdog_register man page on OpenBSD

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WDOG_REGISTER(9)	     OpenBSD Kernel Manual	      WDOG_REGISTER(9)

NAME
     wdog_register - kernel watchdog interface

SYNOPSIS
     #include <sys/systm.h>

     void
     wdog_register(void *cb_arg, int (*cb)(void *cb_arg, int period));

DESCRIPTION
     The kernel watchdog interface is used by hardware watchdog drivers and
     should be used for all future drivers.

     wdog_register() is called by the hardware driver after configuring the
     hardware watchdog device.	The cb_arg argument is a pointer to the
     hardware device control structure.	 The cb argument is a pointer to a
     function supplied by the driver which sets the timeout in the hardware
     device.

     The cb_arg parameter given to cb is a pointer to the device control
     structure.	 The period parameter supplies the desired timeout value in
     seconds.  A period value of zero disables the watchdog.  Setting the
     timeout to a nonzero value after disabling the watchdog will update the
     timeout value and enable the watchdog.

CODE REFERENCES
     The framework is implemented in the file sys/kern/kern_watchdog.c.

SEE ALSO
     watchdog(4), sysctl_int(9), timeout(9)

HISTORY
     The watchdog timer framework was written by Markus Friedl
     <markus@openbsd.org> and first appeared in OpenBSD 3.3.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9

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