IHostIoCompletionManager::CreateIoCompletionPort Method

Requests that the host create a new I/O completion port.


HRESULT CreateIoCompletionPort (  
    [out] HANDLE *phPort  


[out] A pointer to a handle to the newly created I/O completion port, or 0 (zero), if the port could not be created.

Return Value

HRESULT Description
S_OK CreateIoCompletionPort returned successfully.
HOST_E_CLRNOTAVAILABLE The common language runtime (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_OUTOFMEMORY Not enough memory was available to allocate the requested resource.


The CLR calls the CreateIoCompletionPort method to request that the host create a new I/O completion port. It binds I/O operations to this port through a call to the IHostIoCompletionManager::Bind method. The host reports status back to the CLR by calling ICLRIoCompletionManager::OnComplete.


Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See Also

ICLRIoCompletionManager Interface
IHostIoCompletionManager Interface