Passing Data to the Windows Console Management Handler

Question

I am working on writing a simple game engine, and I am having problems processing events in the Windows console; in particular, I cannot figure out how to pass user data to the callback handler.

First I call this code to specify my callback function:

SetConsoleCtrlHandler((PHANDLER_ROUTINE)WindowsSystemManager::ConsoleControlHandler, true); 

My static member callback function is defined as:

 bool WINAPI WindowsSystemManager::ConsoleControlHandler(DWORD controlType){ if(controlType == CTRL_CLOSE_EVENT){ MessageBox(NULL, L"Close Event Captured", L"Close Event Captured", NULL); } return true; } 

Everything works fine - when I click the close button in the console, a MessageBox appears. The only problem is that I need to call code that flushes the log buffer into the log file in this type of shutdown (as well as another cleanup), and the Logger instance is a member of my WindowsSystemManager.

I ran into a similar problem of passing user data to window descriptors using SetWindowLongPtr and GetWindowLongPtr successfully, but I cannot find any information on how to do this with console handlers. Any thoughts?

EDIT: I got this functionality based on MSalters suggestions. Final code for the console handler:

 bool WINAPI WindowsSystemManager::ConsoleControlHandler(DWORD controlType){ BerserkEngine* engine = (BerserkEngine*)GetWindowLongPtr(GetConsoleWindow(), GWLP_USERDATA); if(controlType == CTRL_CLOSE_EVENT){ engine->~BerserkEngine(); PostQuitMessage(0); } return true; } 

Where I set this custom data pointer in the WindowsSystemManager constructor:

 SetWindowLongPtr(GetConsoleWindow(), GWL_USERDATA, (LONG_PTR)this->engine); 

Answer 1

I'm not sure why you need this. You can have multiple windows, but only one console.

However, GetConsoleWindow will provide you with an HWND console that you can call SetWindowLongPtr . Not very clean (you shouldn't do this in windows that you fail), but it might work.