VideoPortReleaseSpinLock function
The VideoPortReleaseSpinLock function releases ownership of a given spin lock and restores the original IRQL at which the caller was running.
Syntax
VOID VideoPortReleaseSpinLock(
_In_ PVOID HwDeviceExtension,
_Inout_ PSPIN_LOCK SpinLock,
_In_ UCHAR NewIrql
);
Parameters
HwDeviceExtension [in]
Pointer to the miniport driver's device extension.SpinLock [in, out]
Pointer to a memory location that contains the spin lock to be released.NewIrql [in]
Specifies the IRQL to be restored.
Return value
None
Remarks
This call is the inverse of VideoPortAcquireSpinLock. The NewIrql value must be the same as the value pointed to by OldIrql when VideoPortAcquireSpinLock returned.
Callers of VideoPortReleaseSpinLock must be running at IRQL = DISPATCH_LEVEL. On return from this routine, IRQL is restored to the NewIrql value.
Requirements
Target platform |
Desktop |
Version |
Available in Windows XP and later versions of the Windows operating systems. |
Header |
Video.h (include Video.h) |
Library |
Videoprt.lib |
DLL |
Videoprt.sys |
IRQL |
DISPATCH_LEVEL (see Remarks section) |
See also