Invaid prototype of PDRIVER_UNLOAD

[HoShiMin]

Which crate is this about?

windows-sys

Crate version

0.51.0

Summary

Is that correct that the PDRIVER_UNLOAD has no PDRIVER_OBJECT argument?
It has the following prototype:

pub type PDRIVER_UNLOAD = ::core::option::Option<unsafe extern "system" fn() -> ()>;

But in C++ WDK it declared as this:

//
// Define driver unload routine type.
//
_Function_class_(DRIVER_UNLOAD)
_IRQL_requires_(PASSIVE_LEVEL)
_IRQL_requires_same_
typedef
VOID
DRIVER_UNLOAD (
    _In_ struct _DRIVER_OBJECT *DriverObject
    );

And it seems like all function pointers (at least in Foundation module) have no arguments.

Toolchain version/configuration

No response

Reproducible example

No response

Crate manifest

No response

Expected behavior

No response

Actual behavior

No response

Additional comments

No response

[HoShiMin]

And why they declared as Option<fn()> but not like a raw function pointers? Is it compatible with raw C pointers?

[kennykerr]

If the function signature is incorrect then we may need the Win32/WDK metadata to be updated. Here's the repo for that:

https://github.com/microsoft/wdkmetadata

As for Option, that is guaranteed to be the same size:

https://doc.rust-lang.org/stable/std/option/index.html#representation