Comment by stabbles

You can have RAII with GCC extensions in C:

char *buf __attribute__ ((__cleanup__(free_buf))) = malloc(1024);

This calls free_buf(buf) when buf goes out of scope.

I’ve actually seen projects use it in the wild to close files or free memory in branchy functions. [1]

[1] https://github.com/containers/bubblewrap/blob/c54bbc6d7b78e7...