sel4_kit::slot_manager

Struct SlotManager

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pub struct SlotManager { /* private fields */ }
Expand description

Slot 管理器

Slot 管理器，可以管理和申请特定的 Slot

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impl SlotManager

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pub const fn empty() -> SlotManager

创建一个空 Slot Manager，默认为没有空 Slot

随后在 SlotManager::init_empty_slots 中更新

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pub const fn new(empty_slots: Range<usize>) -> Self

从 empty slots 创建 Slot Manager

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pub const fn init_empty_slots(&mut self, new_slots: Range<usize>)

初始化空的 slot 范围

一般配合 SlotManager::empty 使用

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pub fn alloc_slot(&mut self) -> LeafSlot

申请一个新的空 Slot

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pub fn alloc_slots(&mut self, num: usize) -> SlotRange ⓘ

申请多个 slot

返回的是开始位置的 LeafSlot

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pub fn extend(&mut self, extend_len: usize)

扩展 SlotManager 的管理大小

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  • extend_len 需要扩展的大小

扩展的方式为从原有的范围的结尾向后增长

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pub fn next_range_start(&self) -> usize

获取下一可用范围开始的位置

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下一个可用范围的开始，可以用于 Self::extend

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pub fn available(&self) -> usize

获取 SlotManager 中可用的大小

§返回值
  • [usize] 当前尚未使用的 Slot 数量
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pub fn recycle_slot(&mut self, slot: LeafSlot)

回收一个 LeafSlot

将 LeafSlot 放入回收池中，便于下次申请时复用

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Trait Implementations§

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impl Debug for SlotManager

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl Freeze for SlotManager

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impl RefUnwindSafe for SlotManager

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impl Send for SlotManager

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impl Sync for SlotManager

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impl Unpin for SlotManager

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impl UnwindSafe for SlotManager

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.