IHostTaskManager::BeginThreadAffinity Method

Notifies the host that managed code is entering a period in which the current task must not be moved to another operating system thread.


HRESULT BeginThreadAffinity ();  

Return Value

HRESULT Description
S_OK BeginThreadAffinity 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.


The CLR typically calls IHostTaskManager::BeginThreadAffinity in the context of a call to Thread.BeginThreadAffinity. The current task must not be rescheduled until a corresponding call is made to IHostTaskManager::EndThreadAffinity. Tasks can be switched out, but when they are switched back in, they must be assigned to the same operating system thread from which they were switched out. Nested calls to BeginThreadAffinity have no effect, because the call refers to the current task.


Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See Also

ICLRTask Interface
ICLRTaskManager Interface
IHostTask Interface
IHostTaskManager Interface