CMsg Class
.gif)
The CMsgThread class provides support for a worker thread to which requests can be posted asynchronously instead of sent directly. The CAMThread class provides a worker thread to which single requests can be sent. Only one client can make a request at a time, and the client blocks until the worker thread has completed the request. By contrast, the CMsgThread class provides a worker thread to which any number of requests can be posted. The requests (in the form of a CMsg object) are queued and executed in order, asynchronously. No reply or return value is received.
Data Members
| Member | Description |
|---|---|
| dwFlags | Flag parameter to the request code. |
| lpParam | Data required by the worker thread as parameter or return values. This data should not be stack-based, as it will be referenced some time after completing the queuing operation. |
| pEvent | Event object that a worker thread can signal to indicate the completion of the operation. |
| uMsg | Request code that is defined by the client of the thread class and understood by the overridden worker thread function. |
Member Functions
| Member function | Description |
|---|---|
| CMsg | Constructs a CMsg object. |
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header:
Last updated on Wednesday, April 13, 2005
© 2005 Microsoft Corporation. All rights reserved.