CMsg Class
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4/8/2010
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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, because it is 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 |
|---|---|
Constructs a CMsg object. |
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment |