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|This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.|
Prevent a Photon application from exiting
void PtPreventExit( void );
PtPreventExit() lets Photon know that it isn't safe to exit your application.
In a multithreaded application, any thread can call PtExit(), but another thread might be in the middle of an important operation, such as writing a file. To prevent this situation from arising, call PtPreventExit() before starting the operation, and call PtAllowExit() when it's done.
|Instead of calling PtPreventExit() and PtAllowExit() directly, you're better off calling PtEnter() and PtLeave() with Pt_DELAY_EXIT set in the flags. For a discussion of the difference between these functions and using Pt_DELAY_EXIT, see "Exiting a multithreaded program" in the Parallel Operations chapter of the Photon Programmer's Guide.|
Parallel Operations chapter of the Photon Programmer's Guide