| MSTOHZ(9) | Kernel Developer's Manual | MSTOHZ(9) |
mstohz, hztoms —
#include <sys/param.h>
unsigned int
mstohz(unsigned
int ms);
unsigned int
hztoms(unsigned
int hz);
mstohz() macro can be used to convert time in
milliseconds to system clock ticks, as used by the
callout(9) facility, in an
integer-overflow safe way. Conversely, hztoms()
converts system clock ticks to milliseconds.
These macros are defined in the ⟨sys/param.h⟩ header. Individual ports can have a processor-specific, more efficient version implemented in their ⟨machine/param.h⟩ header as a define.
mstohz() nor hztoms()
make use of expensive 64-bit integer arithmetic. The result from
mstohz() will be rounded down to one second if the
parameter is larger than 131072 milliseconds.
| September 28, 2019 | NetBSD 10.0 |