// storport.h

ULONG StorPortQueryTimerMinInterval(
  [in]  PVOID  HwDeviceExtension,
  [out] PULONG TimerMinInterval
);
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Windows Driver Kit DDI reference (nf-storport-storportquerytimermininterval)

Description

StorPortQueryTimerMinInterval queries the minimum timer resolution that is supported by the system clock.

Parameters

`HwDeviceExtension` [in]

A pointer to the miniport's device extension.

`TimerMinInterval` [out]

Pointer to a ULONG in which this function writes the minimum time interval, in 100-nanosecond units, between successive ticks of the system clock.

Return value

This function returns one of the following status codes.

Return code	Description
STOR_STATUS_SUCCESS	The timer minimum interval was successfully queried.
STOR_STATUS_INVALID_PARAMETER	A parameter is invalid.
STOR_STATUS_UNSUCCESSFUL	Returned for other internal system reasons.

Remarks

A miniport can call this function to query the minimum timer resolution that is supported by the system clock, which can be helpful for implementing I/O polling.

View the official Windows Driver Kit DDI reference