IHostSyncManager::CreateRWLockReaderEvent Method

Creates a manual-reset event object for the implementation of a reader lock.


HRESULT CreateRWLockReaderEvent (  
    [in]  BOOL bInitialState,  
    [in]  SIZE_T cookie,  
    [out] IHostManualEvent **ppEvent  


[in] true, if ppEvent should be signaled; otherwise, false.

[in] A cookie to associate with the reader lock.

[out] A pointer to the address of an IHostManualEvent instance, or null if the event object could not be created.

Return Value

HRESULT Description
S_OK CreateRWLockReaderEvent 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 create the requested event object.


The CLR calls CreateRWLockReaderEvent to get a reference to an IHostManualEvent instance to use in its implementation of a reader lock. The host can use the cookie to determine which tasks are waiting on the reader lock by querying the ICLRSyncManager interface.


Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See Also

ICLRSyncManager Interface
IHostAutoEvent Interface
IHostManualEvent Interface
IHostSyncManager Interface