# TaskContext in os::task - Rust
Task Context
Keywords: rust, rustlang, rust-lang, TaskContext

# Struct os::task::TaskContext

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    #[repr(C)]pub struct TaskContext {
        ra: usize,
        sp: usize,
        s: [usize; 12],
    }

Expand description

Task Context

## Fields

`ra: usize`

return address ( e.g. __restore ) of __switch ASM function

`sp: usize`

kernel stack pointer of app

`s: [usize; 12]`

callee saved registers: s 0..11

## Implementations

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### impl TaskContext

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#### pub fn zero_init() -> Self

init task context

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#### pub fn goto_restore(kstack_ptr: usize) -> Self

set task context {__restore ASM funciton, kernel stack, s_0..12 }

## Trait Implementations

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### impl Clone for TaskContext

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#### fn clone(&self) -> TaskContext

Returns a copy of the value. Read more

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#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more

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### impl Copy for TaskContext

## Auto Trait Implementations

### impl RefUnwindSafe for TaskContext

### impl Send for TaskContext

### impl Sync for TaskContext

### impl Unpin for TaskContext

### impl UnwindSafe for TaskContext

## Blanket Implementations

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

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#### pub 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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#### pub 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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#### pub 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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#### pub fn from(t: T) -> T

Performs the conversion.

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

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#### pub fn into(self) -> U

Performs the conversion.

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

#### type Error = Infallible

The type returned in the event of a conversion error.

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#### pub 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>,

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

The type returned in the event of a conversion error.

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#### pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.