IHostIoCompletionManager::GetMaxThreads Method

Gets the maximum number of threads that the host can allot to service I/O requests.


HRESULT GetMaxThreads (  
    [out] DWORD *pdwMaxIoCompletionThreads  


[out] A pointer to the maximum number of threads in the thread pool that the host can allot to service I/O requests.

Return Value

HRESULT Description
S_OK GetMaxThreads 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_NOTIMPL The host does not provide an implementation of GetMaxThreads.


A host might want exclusive control over the number of threads that can be allotted to process I/O requests, for reasons such as implementation, performance, or scalability. For this reason, the host is not required to implement GetMaxThreads. In this case, the host should return E_NOTIMPL from this method.


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