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StorPortQueryPerformanceCounter function (storport.h)

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The current system performance counter value is queried is returned by the StorPortQueryPerformanceCounter routine.. The performance frequency is also returned as an optional parameter.

Syntax

ULONG StorPortQueryPerformanceCounter(
  [in]            PVOID          HwDeviceExtension,
  [out, optional] PLARGE_INTEGER PerformanceFrequency,
  [out]           PLARGE_INTEGER PerformanceCounter
);

Parameters

[in] HwDeviceExtension

A pointer to the hardware device extension for the host bus adapter (HBA).

[out, optional] PerformanceFrequency

A pointer to a large integer to receive the current system performance frequency value. This parameter is optional and can be NULL.

[out] PerformanceCounter

A pointer to a large integer to receive the current system performance counter value.

Return value

StorPortQueryPerformanceCounter returns one of the following status codes:

Return code Description
STOR_STATUS_SUCCESS
 The performance counter value is returned in the large integer pointed to by PerformanceCounter.
STOR_STATUS_INVALID_PARAMETER
 The PerformanceCounter parameter is NULL.

Requirements

Requirement Value
Minimum supported client Windows 8
Target Platform Universal
Header storport.h (include Storport.h)
IRQL Any

See also

StorPortQuerySystemTime