IHostMemoryManager::RegisterMemoryNotificationCallback Method

Registers a pointer to a callback function that the host invokes to notify the common language runtime (CLR) of the current memory load on the computer.

Syntax

HRESULT RegisterMemoryNotificationCallback (  
    [in] ICLRMemoryNotificationCallback* pCallback  
);  

Parameters

pCallback
[in] An interface pointer to an ICLRMemoryNotificationCallback instance that is implemented by the CLR.

Return Value

HRESULT	Description
S_OK	RegisterMemoryNotificationCallback 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.

Remarks

Because the ICLRMemoryNotificationCallback interface defines only one method (ICLRMemoryNotificationCallback::OnMemoryNotification), and because pCallback is a pointer to an ICLRMemoryNotificationCallback instance provided by the CLR, the registration is effectively for the callback function itself. The host invokes OnMemoryNotification to report memory pressure conditions, rather than using the standard Win32 CreateMemoryResourceNotification function. For more information, see the Windows Platform documentation.

Note

Calls to OnMemoryNotification never block. They always return immediately.

Requirements

Platforms: See System Requirements.

Header: MSCorEE.h

Library: Included as a resource in MSCorEE.dll

.NET Framework Versions: Available since 2.0

See also

• ICLRMemoryNotificationCallback Interface
• IHostMemoryManager Interface