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Moved to reference passing system

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This commit is contained in:
François Autin 2023-03-15 15:20:20 +01:00
parent abb97d17d5
commit 1906ec836c
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GPG Key ID: 343F5D382E1DD77C
4 changed files with 64 additions and 109 deletions
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23
src/kernel/scheduler.rs
View File

@ -3,12 +3,12 @@ use std::rc::Rc;
use crate::utility::list::List;
use crate::kernel::thread::Thread;
use super::system::System;
use super::thread_manager::ThreadManager;
#[derive(PartialEq)]
pub struct Scheduler {
ready_list: List<Rc<RefCell<Thread>>>,
pub thread_manager: Option<Rc<RefCell<ThreadManager>>>
ready_list: List<Rc<RefCell<Thread>>>
}
impl Scheduler {
@ -18,8 +18,7 @@ impl Scheduler {
/// Initilize the list of ready thread
pub fn new() -> Self {
Self {
ready_list: List::new(),
thread_manager: Option::None
ready_list: List::new()
}
}
@ -54,21 +53,17 @@ impl Scheduler {
/// ## Parameter
///
/// **next_thread** thread to dispatch to the CPU
pub fn switch_to(&mut self, next_thread: Rc<RefCell<Thread>>) {
if let Some(tm) = &self.thread_manager {
let rc = Rc::clone(&tm);
if let Some(old_thread) = tm.borrow_mut().get_g_current_thread() {
rc.borrow_mut().thread_save_processor_state(Rc::clone(&old_thread));
pub fn switch_to(&mut self, system: &mut System, next_thread: Rc<RefCell<Thread>>) {
let thread_manager = system.get_thread_manager();
if let Some(old_thread) = thread_manager.get_g_current_thread() {
thread_manager.thread_save_processor_state(system, Rc::clone(&old_thread));
// old_thread.save_simulator_state();
if old_thread != &next_thread {
rc.borrow_mut().thread_restore_processor_state(Rc::clone(&next_thread));
thread_manager.thread_restore_processor_state(system, Rc::clone(&next_thread));
// next_thread.restore_simulator_state();
rc.borrow_mut().set_g_current_thread(Option::Some(next_thread));
thread_manager.set_g_current_thread(Option::Some(next_thread));
}
}
} else {
panic!("thread manager shouldn't be none");
}
}
}

25
src/kernel/system.rs
View File

@ -16,10 +16,7 @@ macro_rules! init_system {
init_system!(m)
}};
($a:expr) => {{
let sys = std::rc::Rc::new(std::cell::RefCell::new(crate::System::new($a)));
crate::System::freeze(std::rc::Rc::clone(&sys));
sys
$crate::System::new($a)
}};
}
@ -36,7 +33,7 @@ macro_rules! init_system {
#[derive(PartialEq)]
pub struct System {
machine: Machine,
thread_manager: Rc<RefCell<ThreadManager>>
thread_manager: ThreadManager
}
impl System {
@ -45,29 +42,21 @@ impl System {
pub fn new(machine: Machine) -> System {
Self {
machine,
thread_manager: Rc::new(RefCell::new(ThreadManager::new()))
thread_manager: ThreadManager::new()
}
}
/// use thread_manager setter to send it system instance
pub fn freeze(this: Rc<RefCell<System>>) {
let copy = Rc::clone(&this);
let tm = &this.borrow_mut().thread_manager;
tm.borrow_mut().system = Option::Some(copy);
ThreadManager::freeze(tm);
}
// GETTERS
/// Returns the Machine
///
/// Useful to access RAM, devices, ...
pub fn get_machine(&self) -> Machine {
self.machine
pub fn get_machine(&self) -> &Machine {
&self.machine
}
pub fn get_thread_manager(&self) -> Rc<RefCell<ThreadManager>> {
Rc::clone(&self.thread_manager)
pub fn get_thread_manager(&self) -> &ThreadManager {
&self.thread_manager
}
// Setters

55
src/kernel/thread_manager.rs
View File

@ -36,11 +36,6 @@ impl ThreadManager {
}
}
pub fn freeze(this: &Rc<RefCell<ThreadManager>>) {
let copy = Rc::clone(this);
this.borrow_mut().g_scheduler.thread_manager = Option::Some(copy);
}
/// Start a thread, attaching it to a process
pub fn start_thread(&mut self, thread: Rc<RefCell<Thread>>, owner: Process, func_pc: i64, argument: i64) -> Result<(), ErrorCode> {
let mut thread_m = thread.borrow_mut();
@ -57,19 +52,17 @@ impl ThreadManager {
}
/// Wait for another thread to finish its execution
pub fn thread_join(&mut self, id_thread: Rc<RefCell<Thread>>) {
pub fn thread_join(&mut self, system: &mut System, id_thread: Rc<RefCell<Thread>>) {
while self.get_g_alive().contains(&Rc::clone(&id_thread)) {
self.thread_yield(Rc::clone(&id_thread));
self.thread_yield(system, Rc::clone(&id_thread));
}
}
/// Relinquish the CPU if any other thread is runnable.
///
/// Cannot use yield as a function name -> reserved name in rust
pub fn thread_yield(&mut self, thread: Rc<RefCell<Thread>>) {
if let Some(system) = &self.system {
let sys = system.borrow_mut();
let mut machine = sys.get_machine();
pub fn thread_yield(&mut self, system: &mut System, thread: Rc<RefCell<Thread>>) {
let mut machine = system.get_machine();
let old_status = machine.interrupt.set_status(crate::simulator::interrupt::InterruptStatus::InterruptOff);
assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
@ -77,74 +70,54 @@ impl ThreadManager {
if let Some(next_thread) = next_thread {
let scheduler = &mut self.g_scheduler;
scheduler.ready_to_run(thread);
scheduler.switch_to(next_thread);
scheduler.switch_to(system, next_thread);
}
machine.interrupt.set_status(old_status);
}
}
/// Put the thread to sleep and relinquish the processor
pub fn thread_sleep(&mut self, thread: Rc<RefCell<Thread>>) {
pub fn thread_sleep(&mut self, system: &mut System, thread: Rc<RefCell<Thread>>) {
assert_eq!(Option::Some(Rc::clone(&thread)), self.g_current_thread);
if let Some(system) = &self.system {
let sys = system.borrow_mut();
let machine = sys.get_machine();
let machine = system.get_machine();
assert_eq!(machine.interrupt.get_status(), InterruptStatus::InterruptOff);
let mut next_thread = self.g_scheduler.find_next_to_run();
while next_thread.is_none() {
eprintln!("Nobody to run => idle");
machine.interrupt.idle();
next_thread = self.g_scheduler.find_next_to_run();
}
self.g_scheduler.switch_to(Rc::clone(&next_thread.unwrap()));
}
self.g_scheduler.switch_to(system, Rc::clone(&next_thread.unwrap()));
}
/// Finish the execution of the thread and prepare its deallocation
pub fn thread_finish(&mut self, thread: Rc<RefCell<Thread>>) {
if let Some(system) = &self.system {
let sys = Rc::clone(system);
let sys = sys.borrow_mut();
let mut machine = sys.get_machine();
pub fn thread_finish(&mut self, system: &mut System, thread: Rc<RefCell<Thread>>) {
let mut machine = system.get_machine();
let old_status = machine.interrupt.set_status(InterruptStatus::InterruptOff);
self.g_thread_to_be_destroyed = Option::Some(Rc::clone(&thread));
self.g_alive.remove(Rc::clone(&thread));
// g_objets_addrs->removeObject(self.thread) // a ajouté plus tard
self.thread_sleep(Rc::clone(&thread));
self.thread_sleep(system, Rc::clone(&thread));
machine.interrupt.set_status(old_status);
}
}
pub fn thread_save_processor_state(&mut self, thread: Rc<RefCell<Thread>>) {
if let Some(system) = &self.system {
pub fn thread_save_processor_state(&mut self, system: &mut System, thread: Rc<RefCell<Thread>>) {
let mut t: RefMut<_> = thread.borrow_mut();
let system = system;
for i in 0..NUM_INT_REGS {
t.thread_context.int_registers[i] = system.get_machine().read_int_register(i);
}
for i in 0..NUM_FP_REGS {
t.thread_context.float_registers[i] = system.get_machine().read_fp_register(i);
}
} else {
unreachable!("System is None")
}
}
pub fn thread_restore_processor_state(&self, thread: Rc<RefCell<Thread>>) {
if let Some(system) = &self.system {
let system = system.borrow_mut();
pub fn thread_restore_processor_state(&self, system: &mut System, thread: Rc<RefCell<Thread>>) {
let t: Ref<_> = thread.borrow();
for i in 0..NUM_INT_REGS {
let machine = system.get_machine();
let mut machine = machine;
machine.write_int_register(i, t.thread_context.int_registers[i]);
}
} else {
unreachable!("System is None")
}
}
/// Currently running thread

2
src/main.rs
View File

@ -21,6 +21,4 @@ use simulator::machine::Machine;
fn main() {
let machine = Machine::init_machine();
let system = Rc::new(RefCell::new(System::new(machine)));
System::freeze(system);
}