Struct os::task::TASK_MANAGER

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pub struct TASK_MANAGER {
    __private_field: (),
}
Expand description

a TaskManager global instance through lazy_static!

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§__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 ch4, 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 get_current_token(&self) -> usize

Get the current ‘Running’ task’s token.

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fn get_current_trap_cx(&self) -> &'static mut TrapContext

Get the current ‘Running’ task’s trap contexts.

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pub fn change_current_program_brk(&self, size: i32) -> Option<usize>

Change the current ‘Running’ task’s program break

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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

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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§

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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.