Blocks the MFShutdown function.
HRESULT MFLockPlatform()
Type: HRESULTÂ
The function returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
| S_OK | The function succeeded. |
Refer to Media Foundation return codes.
This function prevents work queue threads from being shut down when MFShutdown is called. Use this function to ensure that asynchronous operations complete gracefully before the platform shuts down.
This function holds a lock on the Media Foundation platform. To unlock the platform, call MFUnlockPlatform. The application must call MFUnlockPlatform once for every call to MFLockPlatform.
The MFShutdown function blocks until the platform is unlocked, or until a fixed wait period has elapsed. (The wait period is a few seconds.) To avoid memory leaks, the application should unlock the platform before the wait period ends. For example, cancel any asynchronous operations that are waiting to complete and are holding a lock on the platform.
The default implementation of the IMFAsyncResult interface automatically locks the Media Foundation platform when the result object is created. Releasing the interface unlocks the platform. Therefore, in most cases your application does not need to lock the platform directly. For more information, see Work Queues.
Header: Declared in mfapi.h.
Library: Use mfplat.lib.