Embedding Python into an MFC app - thread problems.
john.deford at staarinc.com
Tue Aug 24 23:16:44 CEST 1999
I've embedded Python + win32 extensions into my MFC app with the following
code scrap in my app's InitInstance member (taken from Pythonwin embedding
glue.bShouldAbandonThreadState = false; // Wasn't in example!
if (!glue.DynamicApplicationInit("import initscore", NULL))
// Assuming you have a ReportError method - do whatever makes sense!
AfxMessageBox("Could not attach to the Python win32ui extensions.",
ptPythonThread = PyThreadState_Swap(NULL); // Wasn't in example!
I'm using MSVC++ 6.0, and my application is responsible for displaying all
windows at the moment. The two lines commented by "// Wasn't in example",
plus the following lines bracketing subsequent Python calls seemed to be
required to get it to work:
PyThreadState* ptThread = ((CCtest2App*)AfxGetApp())->ptPythonThread; //
Stored by call in InitInstance.
PyThreadState* _save = PyThreadState_Swap(ptThread);
....// various Python C api function calls...
Without all this thread swapping Python throws a fatal error saying current
thread is NULL. Am I missing something, or is this additional code really
necessary? The sources I'm working with are all the August 1999 versions.
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