ostd::task

Struct CurrentTask

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pub struct CurrentTask(NonNull<Task>);
Expand description

The current task.

This type is not Send, so it cannot outlive the current task.

This type is also not Sync, so it can provide access to the local data of the current task.

Tuple Fields§

§0: NonNull<Task>

Implementations§

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impl CurrentTask

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unsafe fn new(task: NonNull<Task>) -> Self

  • task should be the current task in the execution.
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pub fn local_data(&self) -> &(dyn Any + Send)

Returns the local data of the current task.

Note that the local data is only accessible in the task context. Although there is a current task in the non-task context (e.g. IRQ handlers), access to the local data is forbidden as it may cause soundness problems.

§Panics

This method will panic if called in a non-task context.

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pub fn cloned(&self) -> Arc<Task>

Returns a cloned Arc<Task>.

Methods from Deref<Target = Task>§

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pub(crate) fn ctx(&self) -> &SyncUnsafeCell<TaskContext>

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pub fn set_tls_pointer(&self, tls: usize)

Sets thread-local storage pointer.

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pub fn tls_pointer(&self) -> usize

Gets thread-local storage pointer.

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pub fn run(self: &Arc<Self>)

Kicks the task scheduler to run the task.

BUG: This method highly depends on the current scheduling policy.

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pub fn data(&self) -> &Box<dyn Any + Send + Sync>

Returns the task data.

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pub fn schedule_info(&self) -> &TaskScheduleInfo

Get the attached scheduling information.

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pub fn user_ctx(&self) -> Option<&Arc<UserContext>>

Returns the user context of this task, if it has.

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pub fn save_fpu_state(&self)

Saves the FPU state for user task.

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pub fn restore_fpu_state(&self)

Restores the FPU state for user task.

Trait Implementations§

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impl AsRef<Task> for CurrentTask

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fn as_ref(&self) -> &Task

Converts this type into a shared reference of the (usually inferred) input type.
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impl Borrow<Task> for CurrentTask

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fn borrow(&self) -> &Task

Immutably borrows from an owned value. Read more
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impl Debug for CurrentTask

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

Formats the value using the given formatter. Read more
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impl Deref for CurrentTask

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type Target = Task

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl !Send for CurrentTask

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impl !Sync for CurrentTask

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Gets the TypeId of self. Read more
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Causes self to use its LowerExp implementation when Debug-formatted.
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Causes self to use its LowerHex implementation when Debug-formatted.
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