Jump to content
  • Advertisement
Sign in to follow this  
lucky6969b

C++ Encapsulation question

This topic is 2867 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts


class myThread
{
public:
myThread() { }
virtual ~myThread() { }
void run() { AfxBeginThread(HelloWindows95,NULL, NULL, NULL, NULL, NULL); }
};

inline UINT HelloWindows95(LPVOID pParam)
{
PlaySound(_T("HELLOWIN.WAV"), NULL, SND_FILENAME);
return 0;
}







Just out of curiosity, is it possible to make the threadproc address "move" along as a new mythread object is created? As now HelloWindows95 is "pinned", if I
encapsulate HelloWindows95 into myThread (myThread::HelloWindows95), the proc would be 0xcccccccc at runtime, anyway I can wrap that around the class so that I could point to any proc i like which depends on the parameter passed in?
Thanks
Jack

Share this post


Link to post
Share on other sites
Advertisement
Not sure if I interpreted your question correctly, but the way I read it you want to be able to create threads that start in different functions? If so, the easiest thing would probably be to pass a function pointer with the right signature to the constructor or run() function.

Passing it to run (for simplicity) might look like this:

class myThread
{
// ...
typedef UINT (*ThreadProc)(LPVOID);

void run(ThreadProc startAddr)
{
AfxBeginThread(startAddr, NULL, NULL, NULL, NULL, NULL);
}
}


Share this post


Link to post
Share on other sites
The other option, is something like:

class myThread
{
virtual UINT proc()
{
}

static UINT HelloWindows95(LPVOID pParam)
{
myThread *pThread = (myThread)pParam;
return pThread->proc();
}

void run() { AfxBeginThread(HelloWindows95,this, NULL, NULL, NULL, NULL); }
}



Then anything inheriting from "myThread" overrides the virtual "proc" function to get the functionality it wants.

Share this post


Link to post
Share on other sites
Quote:
Original post by KulSeran
The other option, is something like:
*** Source Snippet Removed ***
Then anything inheriting from "myThread" overrides the virtual "proc" function to get the functionality it wants.


Looks like it, thanks a lot

Share this post


Link to post
Share on other sites
Quote:
Original post by Windryder
Not sure if I interpreted your question correctly, but the way I read it you want to be able to create threads that start in different functions? If so, the easiest thing would probably be to pass a function pointer with the right signature to the constructor or run() function.

Passing it to run (for simplicity) might look like this:
*** Source Snippet Removed ***


Thanks

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

Participate in the game development conversation and more when you create an account on GameDev.net!

Sign me up!