Kernel documentation. Still need to do thread.rs
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//! # Exceprions
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//!
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//! This module Enum the constant values of the exceptions.
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//! They are used to stop the system to execute some opperation
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use std::{cell::RefCell, rc::Rc};
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use crate::{simulator::{machine::{ExceptionType, Machine}, error::{MachineOk, MachineError}}};
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//! # Error Code
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//!
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//! This module enumerate the possibles error code who could get in a function
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//!
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//! **Basic Usage:*
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//!
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//! Result<YourSuccessStruct, **ErrorCode**
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#![allow(unused, clippy::missing_docs_in_private_items)]
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/// Error enum, use it with Result<YourSucessStruct, **ErrorCode**>
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pub enum ErrorCode {
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//! # Kernel
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//!
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//! This module contains all the tool required for the kernel to work.
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//!
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//! Currently it contains the scheduling and synchroisation tools, but it will contains the tools
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//! required Memory gestion, Files gestion and peripheral pilots.
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pub mod process;
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pub mod thread;
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pub mod mgerror;
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//! # Synchronisation
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//!
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//! This module contains some scheduling and synchronisation utilities:
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//! - **Semaphore**
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//! - **Lock**
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//!
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//! Conditions aren't implemented currently
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use crate::utility::list::List;
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use crate::kernel::thread::Thread;
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use crate::simulator::interrupt::InterruptStatus::InterruptOff;
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@ -6,20 +14,21 @@ use std::cell::RefCell;
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use std::rc::Rc;
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use super::thread_manager::ThreadManager;
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/// Structure of a Semaphore used for synchronisation
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/// Structure of a Semaphore used for synchronisation.
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/// It use a counter to determine the number of thread that can be executed simultaneously.
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#[derive(PartialEq)]
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pub struct Semaphore {
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/// Counter of simultanous Semaphore
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/// Counter of simultaneous Semaphore
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pub counter:i32,
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/// QUeue of Semaphore waiting to be exucated
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/// QUeue of Semaphore waiting to be executed
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pub waiting_queue:List<Rc<RefCell<Thread>>>,
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}
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impl Semaphore {
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/// Initializes a semaphore, so that it can be used for synchronization.
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/// Initializes a semaphore, so that it can be used for synchronization.
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///
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/// ### Parameters
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/// - *counter* initial value of counter
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@ -49,7 +58,7 @@ pub struct Lock {
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impl Lock {
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/// Initialize a Lock, so that it can be used for synchronization.
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/// The lock is initialy free
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/// The lock is initially free
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///
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/// ### Parameters
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/// - **thread_manager** Thread manager which managing threads
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@ -72,7 +81,7 @@ impl Lock {
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let old_status = machine.interrupt.set_status(InterruptOff);
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if self.free {
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self.free = false;
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self.owner = Option::Some(match thread_manager.get_g_current_thread() {
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self.owner = Some(match thread_manager.get_g_current_thread() {
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Some(th) => {
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Rc::clone(&th)
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},
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@ -128,8 +137,14 @@ impl Lock {
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machine.interrupt.set_status(old_status);
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}
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/// True if the current thread holds this lock.
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/// Say if the lock is held by the current thread
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/// Useful for checking in Release, and in Condition operations below.
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/// ### Parameters
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/// - **self** The current lock
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/// - **thread-manager** The thread manager present in the system
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/// ### Return
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/// True if the current thread holds this lock.
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pub fn held_by_current_thread(&mut self, thread_manager: &mut ThreadManager) -> bool {
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match &self.owner {
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Some(x) =>
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//! # Thread
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//!
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//!
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use std::{rc::Rc, cell::RefCell};
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use super::{process::Process, thread_manager::ThreadRef};
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