InitLockrestricts access for other UA Applications.

A call of this Methodfor an element that is already locked will be rejected.

While locked, requests from other Applicationsto modify the locked element (e.g., writing to Variables, or invoking Methods) should be rejected with Bad_Locked. However, requests to read or navigate will typically work. Serversmay choose to implement an exclusive locking where other Applicationshave no access at all.

The lock is removed when ExitLockis called. It is automatically removed when the MaxInactiveLockTimeelapsed (see 7.4).

The signature of this Methodis specified below. Table 62and Table 63specify the arguments and AddressSpacerepresentation, respectively.

Signature

InitLock(

[in] 0:String Context,

[out] 0:Int32 InitLockStatus);

Table 62– InitLock Method Arguments

Argument

Description

Context

A string used to provide context information about the current activity going on in the Client.

InitLockStatus

0 – OK

-1 – E_AlreadyLocked – the element is already locked

-2 – E_Invalid – the element cannot be locked

Table 63– InitLock Method AddressSpace definition

Attribute

Value

BrowseName

InitLock

References

NodeClass

BrowseName

DataType

TypeDefinition

Other

0:HasProperty

Variable

InputArguments

0:Argument[]

0:PropertyType

M

0:HasProperty

Variable

OutputArguments

0:Argument[]

0:PropertyType

M

Conformance Units

DI Locking