WdfSpinLockAcquire function (wdfsync.h)
The WdfSpinLockAcquire method acquires a specified spin lock.
Syntax
void WdfSpinLockAcquire(
WDFSPINLOCK SpinLock
);
Parameters
SpinLock
A handle to a framework spin-lock object, obtained by a previous call to WdfSpinLockCreate.
Return value
None
Remarks
The WdfSpinLockAcquire method returns after the specified spin lock has been acquired. For KMDF, the method returns at IRQL = DISPATCH_LEVEL. For UMDF, the method returns at passive.
Your driver cannot call WdfSpinLockAcquire to acquire a spin lock that the driver has specified in a WDF_INTERRUPT_CONFIG structure.
For more information about spin locks, see Using Framework Locks.
Requirements
| Requirement | Value |
|---|---|
| Minimum KMDF version | 1.0 |
| Minimum UMDF version | 2.0 |
| Header | wdfsync.h (include Wdf.h) |
| Library | Wdf01000.sys (KMDF); WUDFx02000.dll (UMDF) |
| IRQL | <=DISPATCH_LEVEL |
| DDI compliance rules | DriverCreate(kmdf), KmdfIrql(kmdf), KmdfIrql2(kmdf), KmdfIrqlExplicit(kmdf), ReqSendWhileSpinlock(kmdf), WdfSpinlock(kmdf), WdfSpinlockRelease(kmdf) |