windows - KeEnterGuardedRegion() vs. KeRaiseIrql(APC_LEVEL, &old_irql) -

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there 2 ways disable apcs:

  1. call keenterguardedregion();

  2. call keraiseirql(apc_level, &old_irql);

what's difference?

see msdn documentation titled disabling apcs:

using guarded region faster raising , lowering current irql, guarded regions available in windows server 2003 , later versions of windows.

so, if code needs support windows xp, use keraiseirql.

if not, use keenterguardedregion.


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