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The KeAreApcsDisabled routine returns whether the calling thread is within a critical region, which disables normal kernel APC delivery, or a guarded region, which disables all kernel APC delivery.
Syntax
BOOLEAN KeAreApcsDisabled();
Return value
KeAreApcsDisabled returns TRUE if the thread is within a critical region or a guarded region, and FALSE otherwise.
Remarks
A thread running at IRQL = PASSIVE_LEVEL can use KeAreApcsDisabled to determine if normal kernel APCs are disabled. A thread that is inside a critical region has both user APCs and normal kernel APCs disabled, but not special kernel APCs. A thread that is inside a guarded region has all APCs disabled, including special kernel APCs.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows XP and later versions of Windows. |
| Target Platform | Universal |
| Header | ntddk.h (include Wdm.h, Ntddk.h, Ntifs.h) |
| Library | NtosKrnl.lib |
| DLL | NtosKrnl.exe |
| IRQL | <= DISPATCH_LEVEL |
| DDI compliance rules | HwStorPortProhibitedDDIs(storport) |