WdfSpinLockAcquire メソッド

The WdfSpinLockAcquire method acquires a specified spin lock.

構文

VOID WdfSpinLockAcquire(
  [in]  WDFSPINLOCK SpinLock
);

パラメーター

• SpinLock [in]
  A handle to a framework spin-lock object, obtained by a previous call to WdfSpinLockCreate.

戻り値

None.

A bug check occurs if the driver supplies an invalid object handle.

解説

The WdfSpinLockAcquire method returns after the specified spin lock has been acquired. The method returns at IRQL = DISPATCH_LEVEL.

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 Synchronization Techniques for Framework-Based Drivers.

例

The following code example is part of an EvtInterruptDpc callback function from the PCIDRV sample driver. The example acquires a spin lock, calls a routine that processes received packets, and releases the spin lock.

  VOID
NICEvtInterruptDpc(
    IN WDFINTERRUPT  WdfInterrupt,
    IN WDFOBJECT  WdfDevice
    )
{
...
    WdfSpinLockAcquire(fdoData->RcvLock);
    NICHandleRecvInterrupt(fdoData);
    WdfSpinLockRelease(fdoData->RcvLock);
...
}

要件

参照

WDF_INTERRUPT_CONFIG

WdfSpinLockCreate

WdfSpinLockRelease