IWDFDeviceInitialize::SetLockingConstraint method (wudfddi.h)

Article
02/22/2024

[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]

The SetLockingConstraint method sets the synchronization (or locking) model for callback functions into the driver.

Syntax

void SetLockingConstraint(
  [in] WDF_CALLBACK_CONSTRAINT LockType
);

Parameters

[in] LockType

A value of type WDF_CALLBACK_CONSTRAINT that identifies the locking model.

Return value

None

Remarks

The default value of the LockType parameter is WdfDeviceLevel, which is currently the only supported value.

Examples

For a code example of how to use the SetLockingConstraint method, see IWDFDriver::CreateDevice.

Requirements

Requirement	Value
End of support	Unavailable in UMDF 2.0 and later.
Target Platform	Desktop
Minimum UMDF version	1.5
Header	wudfddi.h (include Wudfddi.h)
DLL	WUDFx.dll