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InterruptDisabler



 
InterruptSourceState InterruptDisabler(

                     InterruptSetMember ISTmember,

                     void * refCon);

--> ISTmember: Member set ID of the IST member requesting service.
<--> refCon: 32-bit reference constant registered with the IST member.

DESCRIPTION

Invoking InterruptDisabler disables the interrupt member's ability to propagate interrupts to Mac OS. This routine returns the member's ability to propagate interrupts as it was before the routine was invoked. A returned value of kSourceWasEnabled means that the interrupt member's propagation state was enabled; a returned value of kSourceWasDisabled means it was disabled.

Note

Apple-defined enabler functions do not use the passed values of refCon and should therefore be passed nil. The refCon value lets user-defined enabler functions receive a reference constant of the programmer's choice.