Sign in to follow this  

Boost.Python pointer parameters

This topic is 4282 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

1. If I want to expose a C++ function like: void f(string* ptr) or void g(int* ptr), do I have to explicitly expose string and int to python? Trying to call f() or g() from Python w/ a string or int respectively gives me a "does not match C++ signature" error. 2. If I have:
void acceptPtr(C* ptr)
{
	delete ptr;
	ptr = NULL;
}
and I call acceptPtr() from Python:
c = module.C()
module.acceptPtr(c)
How is c passed? I defined the deconstructor of C to print out a message, which it did following the call to acceptPtr(), which should mean that ptr was successfully deleted. However, after the call to acceptPtr(), the c object in Python was still working like it wasn't deleted (I could still access member variables and call member methods with it). Does Python pass a new'd copy of the Python object? EDIT: In regards to #2, it seems that the member variable values for c got erased so I'm thinking that the c object in Python was actually deleted by the acceptPtr() function in C++, and for some reason just bits and pieces of it are still floating around in memory. I'm also guessing this means Python objects are passed in to C++ functions as a new'd object?

Share this post


Link to post
Share on other sites

This topic is 4282 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.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this