SPLRAISE(9) | Kernel Developer's Manual | SPLRAISE(9) |
spllower
, splraise
—
#include <machine/intr.h>
void
spllower
(int
s);
int
splraise
(int
s);
In a multi-CPU system, these functions change the interrupt priority level on the local CPU only. In general, device drivers should not make use of these functions.
The spllower
() function sets the system
priority level to the one encoded in s, if
s is lower than the current level. Otherwise, it does
not change the level. Use splx
() instead of
spllower
(), except in extraordinary
circumstances.
The splraise
() function sets the system
priority level to the one encoded in s, if
s is greater than the current level, and returns the
previous level. Otherwise, it does not change the level, and it returns the
current level. Except in extraordinary circumstances, do not use
splraise
(). Use one of the priority-raising
functions defined in spl(9),
instead.
February 5, 2010 | NetBSD 9.2 |