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PHW_INTERRUPT callback function (strmini.h)

  • Article

StrMiniInterrupt is the minidriver's interrupt service routine.

Syntax

PHW_INTERRUPT PhwInterrupt;

BOOLEAN PhwInterrupt(
  [in] IN PVOID DeviceExtension
)
{...}

Parameters

[in] DeviceExtension

Pointer to the minidriver's device extension.

Return value

StrMiniInterrupt returns TRUE if the device generated the interrupt, and FALSE otherwise.

Remarks

The class driver calls StrMiniInterrupt each time it receives an interrupt on behalf of the minidriver.

An interrupt may be shared among several different devices. The minidriver's StrMiniInterrupt routine must determine if its underlying hardware actually generated the interrupt. If the device did not generate the interrupt, StrMiniInterrupt should return FALSE as soon as possible -- for shared interrupts, the operating system calls the interrupt service routines registered for that interrupt until one of the routines returns TRUE, so the ISR may keep the actual device that generated the interrupt waiting if it takes too long to complete.

Requirements

Requirement Value
Target Platform Desktop
Header strmini.h (include Strmini.h)