IHostControl::GetHostManager Method

Gets an interface pointer to the host's implementation of the interface with the specified IID.

HRESULT GetHostManager (
    [in] REFIID riid,
    [out, iid_is(riid)] IUnknown** ppObject
);

Parameters

• riid
  [in] The IID of the interface that the common language runtime (CLR) is querying for.

• ppObject
  [out] A pointer to the host-implemented interface, or null if the host does not support this interface.

Return Value

HRESULT	Description
S_OK	GetHostManager returned successfully.
HOST_E_CLRNOTAVAILABLE	The CLR has not been loaded into a process, or the CLR is in a state in which it cannot run managed code or process the call successfully.
HOST_E_TIMEOUT	The call timed out.
HOST_E_NOT_OWNER	The caller does not own the lock.
HOST_E_ABANDONED	An event was canceled while a blocked thread or fiber was waiting on it.
E_FAIL	An unknown catastrophic failure occurred. When a method returns E_FAIL, the CLR is no longer usable within the process. Subsequent calls to hosting methods return HOST_E_CLRNOTAVAILABLE.
E_INVALIDARG	The requested IID is not valid.
E_NOINTERFACE	The requested interface is not supported.

Remarks

The CLR queries the host to determine whether it supports one or more of the following interfaces:

• IHostMemoryManager

• IHostTaskManager

• IHostThreadPoolManager

• IHostIoCompletionManager

• IHostSyncManager

• IHostAssemblyManager

• IHostGCManager

If the host supports the specified interface, it sets ppObject to its implementation of that interface. Otherwise, it sets ppObject to null.

The CLR does not call Release on host managers, even when you shut it down.

Requirements

Platforms: See .NET Framework System Requirements.

Header: MSCorEE.idl

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: 3.5 SP1, 3.5, 3.0 SP1, 3.0, 2.0 SP1, 2.0

See Also

Reference

IHostControl Interface

Change History

Date	History	Reason
December 2010	Clarified that Release is never called on host managers.	Content bug fix.