MFPutWorkItemEx2 function (mfapi.h)

Puts an asynchronous operation on a work queue, with a specified priority.

Syntax

HRESULT MFPutWorkItemEx2(
  DWORD          dwQueue,
  LONG           Priority,
  IMFAsyncResult *pResult
);

Parameters

dwQueue

The identifier for the work queue. This value can specify one of the standard Media Foundation work queues, or a work queue created by the application. For list of standard Media Foundation work queues, see Work Queue Identifiers. To create a new work queue, call MFAllocateWorkQueue or MFAllocateWorkQueueEx.

Priority

The priority of the work item. This value should be 1, 0, or -1. Items with a value of 1 are executed before items with a value of 0. Items with a value of -1 are executed after items with a value of 0.

pResult

A pointer to the IMFAsyncResult interface of an asynchronous result object. To create the result object, call MFCreateAsyncResult.

Return value

Returns an HRESULT value. Possible values include the following.

Return code Description
S_OK
Success.
MF_E_INVALID_WORKQUEUE
Invalid work queue identifier.
MF_E_SHUTDOWN
The MFStartup function was not called, or MFShutdown was called.

Remarks

To invoke the work item, this function passes pResult to the MFInvokeCallback function. The callback is specified when you create the result object specified by pResult.

Requirements

   
Minimum supported client Windows 8 [desktop apps | UWP apps]
Minimum supported server Windows Server 2012 [desktop apps | UWP apps]
Target Platform Windows
Header mfapi.h
Library Mfplat.lib
DLL Mfplat.dll

See also

Media Foundation Functions

Work Queue and Threading Improvements

Work Queues