Struct Thread

pub struct Thread {
    pub id: usize,
    pub registers: Registers,
    kernel_stack: &'static mut [u32],
    pub exited: bool,
    action: extern "C" fn() -> !,
}

The Thread is an object used by the scheduler.

Fields

id: usize

Thread id, each thread should have a different one

registers: Registers

Saved registers

kernel_stack: &'static mut [u32]

Kernel stack

exited: bool

If this thread has been killed

action: extern "C" fn() -> !

Function pointer

Implementations

impl Thread

pub fn new(action: extern "C" fn() -> !) -> Self

Creates a new thread with the given action.

pub fn init(&mut self, kernel_stack: &'static mut [u32])

pub fn kernel_stack(&self) -> *mut ()

Returns the top of the kernel stack pointer.

extern "C" fn kernel_kickoff(action: extern "C" fn())

Kickoff function that is called in kernel mode.

If the thread was configured with a user stack, user_kickoff is called in user mode. Otherwise the action is executed directly in the kernel.

pub fn resume(&mut self, next: &Self)

Switches from the currently running thread to the next one.

The values currently present in the callee-saved registers will be stored in this threads context-structure, the corresponding values belonging to next thread will be loaded.

pub fn go(&self)

Activates the first thread on this CPU.

Calling the method starts the first thread on the calling CPU. From then on, Thread::resume must be used all subsequent context switches.

Trait Implementations

impl Debug for Thread

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

Formats the value using the given formatter.