IResourceManager::NotifyAcquire method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The NotifyAcquire method notifies the resource manager that an attempt to acquire a resource has completed.
Syntax
HRESULT NotifyAcquire(
[in] LONG idResource,
[in] IResourceConsumer *pConsumer,
[in] HRESULT hr
);
Parameters
[in] idResource
Token for the registered resource.
[in] pConsumer
Pointer to the IResourceConsumer interface of the object requesting the resource.
[in] hr
Value indicating the success of the acquisition; S_OK if the resource was acquired, or an error value if not.
Return value
Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.
| Return code | Description |
|---|---|
|
Failure. |
|
NULL pointer argument. |
|
Invalid argument. |
|
Method isn't supported. |
|
Success. |
Remarks
Use this method after an IResourceConsumer::AcquireResource method returns an S_FALSE value, indicating that the acquisition will be asynchronous (that is, handled by a callback mechanism). If the hr parameter is S_OK, the resource manager will assume that the resource is now held by the caller. If the hr parameter is anything other than S_OK, the resource manager will assume that the attempt to acquire the resource failed and will reassign the resource elsewhere.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |