ResUtilGetResourceDependencyByName function

Enumerates the dependencies of a specified resource in a specified cluster and returns a handle to a dependency of a specified type. The PRESUTIL_GET_RESOURCE_DEPENDENCY_BY_NAME type defines a pointer to this function.

Syntax


HRESOURCE WINAPI ResUtilGetResourceDependencyByName(
  _In_ HCLUSTER hCluster,
  _In_ HANDLE   hSelf,
  _In_ LPCWSTR  lpszResourceType,
  _In_ BOOL     bRecurse
);

typedef HRESOURCE (WINAPI *PRESUTIL_GET_RESOURCE_DEPENDENCY_BY_NAME)(
    _In_ HCLUSTER hCluster,
    _In_ HANDLE   hSelf,
    _In_ LPCWSTR  lpszResourceType,
    _In_ BOOL     bRecurse
);

Parameters

hCluster [in]

Handle to the cluster to which the resource belongs.

hSelf [in]

Handle to the dependent resource. This resource depends on one or more resources.

lpszResourceType [in]

NULL-terminated Unicode string specifying the resource type of the dependency to return.

bRecurse [in]

Determines the scope of the search. If TRUE, the function checks the entire dependency tree under the dependent resource. If FALSE, the function checks only the resources on which the dependent resource directly depends.

Return value

If the operation succeeds, the function returns a handle to one of the resources on which the resource specified by hSelf depends. The caller is responsible for closing the handle by calling CloseClusterResource.

If the operation fails, the function returns NULL. For more information, call the GetLastError function.

HRESOURCE
NULL

The operation was not successful. For more information, call the function GetLastError.

Remarks

The ResUtilGetResourceDependencyByName, ResUtilGetResourceDependency, and ResUtilGetResourceNameDependency functions are very similar in that they all provide access to dependencies of a particular resource type. The following list summarizes the differences between the functions.

FunctionHow the dependent resource is specifiedRequires cluster handle
ResUtilGetResourceDependency

Resource handle

No

ResUtilGetResourceDependencyByName

Resource handle

Yes

ResUtilGetResourceNameDependency

Resource name

No

 

Do not call ResUtilGetResourceDependencyByName from any resource DLL entry point function. ResUtilGetResourceDependencyByName can safely be called from a worker thread. For more information, see Function Calls to Avoid in Resource DLLs.

Examples

As the following example illustrates, if you know that resource A depends on a Physical Disk resource, you can use ResUtilGetResourceDependencyByName to obtain a handle to the dependency.


// String initialization and error checking omitted.

HCLUSTER hCluster = OpenCluster( lpszClusterName );

//
// Resource A depends on a storage class resource.
// Get a handle to that resource.
//
HRESOURCE hResA = OpenClusterResource( hCluster, lpszResName );

HRESOURCE hResD = ResUtilGetResourceDependencyByName(
                        hCluster,
                        hResA,
                        L"Physical Disk",
                        TRUE );

// Close handles and free memory.


Requirements

Minimum supported client

None supported

Minimum supported server

Windows Server 2008 Enterprise, Windows Server 2008 Datacenter

Header

ResApi.h

Library

ResUtils.lib

DLL

ResUtils.dll

See also

CloseClusterResource
ResUtilFindDependentDiskResourceDriveLetter
ResUtilGetResourceDependency
ResUtilGetResourceDependencyByClass
ResUtilGetResourceDependentIPAddressProps
ResUtilGetResourceNameDependency

 

 

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