# Struct os::task::TASK_MANAGER

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    pub struct TASK_MANAGER {
        __private_field: (),
    }

Expand description

Global variable: TASK_MANAGER

## Fields

`__private_field: ()`

## Methods from Deref<Target = TaskManager>

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#### fn run_first_task(&self) -> !

Run the first task in task list.

Generally, the first task in task list is an idle task (we call it zero process later). But in ch3, we load apps statically, so the first task is a real app.

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#### fn mark_current_suspended(&self)

Change the status of current `Running` task into `Ready`.

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#### fn mark_current_exited(&self)

Change the status of current `Running` task into `Exited`.

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#### fn find_next_task(&self) -> Option<usize>

Find next task to run and return task id.

In this case, we only return the first `Ready` task in task list.

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#### fn run_next_task(&self)

Switch current `Running` task to the task we have found, or there is no `Ready` task and we can exit with all applications completed

## Trait Implementations

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### impl Deref for TASK_MANAGER

#### type Target = TaskManager

The resulting type after dereferencing.

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#### fn deref(&self) -> &TaskManager

Dereferences the value.

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### impl LazyStatic for TASK_MANAGER

## Auto Trait Implementations

### impl RefUnwindSafe for TASK_MANAGER

### impl Send for TASK_MANAGER

### impl Sync for TASK_MANAGER

### impl Unpin for TASK_MANAGER

### impl UnwindSafe for TASK_MANAGER

## 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,

const: unstable · source

#### 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,

const: unstable · source

#### 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

const: unstable · source

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

Returns the argument unchanged.

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

const: unstable · source

#### 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>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### 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.

const: unstable · source

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

Performs the conversion.