clock() function Post: 74634

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LEARN ABOUT SUSE

drv_usectohz

drv_usectohz(9F)					   Kernel Functions for Drivers 					  drv_usectohz(9F)

NAME

       drv_usectohz - convert microseconds to clock ticks

SYNOPSIS

       #include <sys/types.h>
       #include <sys/ddi.h>

       clock_t drv_usectohz(clock_t microsecs);

INTERFACE LEVEL

       Architecture independent level 1 (DDI/DKI).

PARAMETERS

       microsecs       The number of microseconds to convert.

DESCRIPTION

       drv_usectohz()  converts a length of time expressed in microseconds to  a number of system clock ticks.	The time arguments to  timeout(9F)
       and  delay(9F) are expressed in clock ticks.

       drv_usectohz() is a portable interface for drivers to make calls to timeout(9F) and delay(9F)  and  remain  binary  compatible  should  the
       driver object file be used on a system with a different clock speed (a different number of ticks in a second).

RETURN VALUES

       The  value  returned  is the  number of system clock ticks equivalent to the  microsecs argument. No error value is returned. If the  clock
       tick equivalent to  microsecs is too large to be represented as a  clock_t, then the maximum  clock_t value will be returned.

CONTEXT

       drv_usectohz() can be called from user or interrupt context.

SEE ALSO

       delay(9F), drv_hztousec(9F), timeout(9F)

       Writing Device Drivers

SunOS 5.10							    12 Nov 1992 						  drv_usectohz(9F)

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