Enum Fixed

pub enum Fixed<T> {
    Static(*mut T),
    Owned(Pin<Box<UnsafeCell<T>>>),
}

Objects that can be fixed or allocated.

When using Rust threads from userspace, the kobj_define declarations and the complexity behind it is required. If all Rust use of kernel objects is from system threads, and dynamic memory is available, kernel objects can be freeallocated, as long as the allocations themselves are pinned. This Fixed encapsulates both of these.

Variants

Static(*mut T)

Objects that have been statically declared and just pointed to.

Owned(Pin<Box<UnsafeCell<T>>>)

Objects that are owned by the wrapper, and contained here.

Implementations

impl<T> Fixed<T>

pub fn get(&self) -> *mut T

Get the raw pointer out of the fixed object.

Returns the *mut T pointer held by this object. It is either just the static pointer, or the pointer outside of the unsafe cell holding the dynamic kernel object.

pub fn new(item: T) -> Fixed<T>

Construct a new fixed from an allocation. Note that the object will not be fixed in memory, until after this returns, and it should not be initialized until then.