passing a file descriptor to a C library function through ctypes on windows

Question

I am trying to pass a file descriptor through ctypes, to a C function where writes are performed on the fd. On linux it works. On windows it doesn\'t and I don\'t understand wh

Answer 1

Windows doesn't use file descriptions like Unix does, so I'm hypothesizing that file descriptors are emulated by the C runtime. If you are using two different C runtimes (for example, if your EXE and DLL are compiled by different compilers, or with the same compiler but with different options), then each runtime will have its own "file descriptor emulation" and you can't pass a descriptor from one to the other.