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Merge branch 'lifo-to-fifo' into 'thread_rework'

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list: Lifo to fifo

See merge request simpleos/burritos!7
This commit is contained in:
Legot Quentin 2023-03-22 13:58:08 +00:00
commit 34a72da4b4
4 changed files with 196 additions and 99 deletions
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6
src/kernel/synch.rs
View File

@ -26,7 +26,7 @@ impl Semaphore {
/// - *counter* initial value of counter
/// - *thread_manager* Thread manager which managing threads
pub fn new(counter: i32) -> Semaphore{
Semaphore { counter, waiting_queue: List::new()}
Semaphore { counter, waiting_queue: List::default() }
}
/// Decrement the value, and wait if it becomes < 0. Checking the
@ -98,7 +98,7 @@ impl Lock {
/// ### Parameters
/// - **thread_manager** Thread manager which managing threads
pub fn new() -> Lock {
Lock { owner: None, waiting_queue: List::new(), free: true }
Lock { owner: None, waiting_queue: List::default(), free: true }
}
/// Wait until the lock become free. Checking the
@ -196,7 +196,7 @@ impl Condition {
/// ### Parameters
/// - *thread_manager* Thread manager which managing threads
pub fn new() -> Condition {
Condition{ waiting_queue: List::new()}
Condition{ waiting_queue: List::default()}
}
/// Block the calling thread (put it in the wait queue).

4
src/kernel/thread_manager.rs
View File

@ -28,8 +28,8 @@ impl ThreadManager {
Self {
g_current_thread: Option::None,
g_thread_to_be_destroyed: Option::None,
g_alive: List::new(),
ready_list: List::new(),
g_alive: List::default(),
ready_list: List::default(),
}
}

2
src/simulator/machine.rs
View File

@ -757,7 +757,7 @@ mod test {
}
#[test]
//#[ignore]
#[ignore]
fn test_comp() {
let mut m = Machine::init_machine();
let memory_before = mem_cmp::MemChecker::from("test/machine/memoryComp.txt").unwrap();

263
src/utility/list.rs
View File

@ -1,62 +1,88 @@
//! Data structure and definition of a genericsingle-linked LIFO list.
use std::ptr;
#[derive(PartialEq)]
pub struct List<T: PartialEq> {
head: Link<T>,
tail: *mut Node<T>,
}
type Link<T> = *mut Node<T>;
type Link<T> = Option<Box<Node<T>>>;
#[derive(PartialEq)]
struct Node<T> {
elem: T,
next: Link<T>,
}
/// Iterator structure for use in a for loop, pop elements before returning it
pub struct IntoIter<T: PartialEq>(List<T>);
/// Iterator structure for use in a for loop, dereference before returning it
pub struct Iter<'a, T> {
next: Option<&'a Node<T>>,
}
/// Same as Iter structure, returned item are mutable
pub struct IterMut<'a, T> {
next: Option<&'a mut Node<T>>,
}
impl<T: PartialEq> List<T> {
/// Create an empty list
pub fn new() -> Self {
List { head: None }
}
/// Push an item at the end of the list
pub fn push(&mut self, elem: T) {
let new_node = Box::new(Node {
elem: elem,
next: self.head.take(),
});
unsafe {
let new_tail = Box::into_raw(Box::new(Node {
elem,
next: ptr::null_mut(),
}));
self.head = Some(new_node);
if !self.tail.is_null() {
(*self.tail).next = new_tail;
} else {
self.head = new_tail;
}
/// Retrieve and remove the item at the end of the list.
self.tail = new_tail;
}
}
/// Retrieve and remove the item at the head of the list.
///
/// Return None if list is empty
pub fn pop(&mut self) -> Option<T> {
self.head.take().map(|node| {
self.head = node.next;
node.elem
})
unsafe {
if self.head.is_null() {
None
} else {
let head = Box::from_raw(self.head);
self.head = head.next;
if self.head.is_null() {
self.tail = ptr::null_mut();
}
Some(head.elem)
}
}
}
/// Retrieve without removing the item at the end of the list
/// Retrieve without removing the item at the head of the list
///
/// Return None if list is empty
pub fn peek(&self) -> Option<&T> {
self.head.as_ref().map(|node| {
&node.elem
})
unsafe {
self.head.as_ref().map(|node| &node.elem)
}
}
/// Retrieve without removing the item at the end of the list as mutable
/// Retrieve without removing the item at the head of the list as mutable
///
/// Return None if lsit is empty
pub fn peek_mut(&mut self) -> Option<&mut T> {
self.head.as_mut().map(|node| {
&mut node.elem
})
unsafe {
self.head.as_mut().map(|node| &mut node.elem)
}
}
/// Search for an element in the list
@ -66,10 +92,12 @@ impl<T: PartialEq> List<T> {
/// Worst case complexity of this function is O(n)
pub fn contains(&self, elem: &T) -> bool {
let mut iter = self.iter();
let element = iter.next();
let mut element = iter.next();
while element.is_some() {
if element.unwrap() == elem {
return true;
} else {
element = iter.next();
}
}
false
@ -81,26 +109,26 @@ impl<T: PartialEq> List<T> {
///
/// Worst-case complexity is O(n)
pub fn remove(&mut self, item: T)-> bool {
let mut found = false;
let mut tmp_list: List<T> = List::new();
while !self.is_empty() {
let current = self.pop().unwrap();
if current != item {
tmp_list.push(current);
unsafe {
let mut current: *mut Node<T> = self.head;
let mut previous: *mut Node<T> = ptr::null_mut();
while !current.is_null() {
if (*current).elem == item {
(*previous).next = (*current).next;
drop(Box::from_raw(current).elem);
return true;
} else {
found = true;
break;
previous = current;
current = (*current).next;
}
}
while !tmp_list.is_empty() {
self.push(tmp_list.pop().unwrap());
}
found
false
}
/// Return true if the list is empty, false otherwise
pub fn is_empty(&self) -> bool {
self.head.is_none()
self.head.is_null()
}
/// Turn the list into an iterator for use in a for loop per example.
@ -114,26 +142,33 @@ impl<T: PartialEq> List<T> {
///
/// When you iter using this method, elements are dereferenced
pub fn iter(&self) -> Iter<'_, T> {
Iter { next: self.head.as_deref() }
unsafe {
Iter { next: self.head.as_ref() }
}
}
/// Same as iter but make the iterator mutable
pub fn iter_mut(&mut self) -> IterMut<'_, T> {
IterMut { next: self.head.as_deref_mut() }
unsafe {
IterMut { next: self.head.as_mut() }
}
}
}
impl<T: PartialEq> Default for List<T> {
/// Create an empty list
fn default() -> Self {
Self { head: ptr::null_mut(), tail: ptr::null_mut() }
}
}
impl<T: PartialEq> Drop for List<T> {
fn drop(&mut self) {
let mut cur_link = self.head.take();
while let Some(mut boxed_node) = cur_link {
cur_link = boxed_node.next.take();
while self.pop().is_some() {} // removing every item from list (necessary as we using unsafe function)
}
}
}
/// Iterator structure for use in a for loop, pop elements before returning it
pub struct IntoIter<T: PartialEq>(List<T>);
impl<T: PartialEq> Iterator for IntoIter<T> {
type Item = T;
@ -143,35 +178,32 @@ impl<T: PartialEq> Iterator for IntoIter<T> {
}
}
/// Iterator structure for use in a for loop, dereference before returning it
pub struct Iter<'a, T> {
next: Option<&'a Node<T>>,
}
impl<'a, T> Iterator for Iter<'a, T> {
type Item = &'a T;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
self.next.map(|node| {
self.next = node.next.as_deref();
self.next = node.next.as_ref();
&node.elem
})
}
}
/// Same as Iter structure, returned item are mutable
pub struct IterMut<'a, T> {
next: Option<&'a mut Node<T>>,
}
impl<'a, T> Iterator for IterMut<'a, T> {
type Item = &'a mut T;
fn next(&mut self) -> Option<Self::Item> {
unsafe {
self.next.take().map(|node| {
self.next = node.next.as_deref_mut();
self.next = node.next.as_mut();
&mut node.elem
})
}
}
}
#[cfg(test)]
@ -180,7 +212,7 @@ mod test {
#[test]
fn basics() {
let mut list = List::new();
let mut list = List::default();
// Check empty list behaves right
assert_eq!(list.pop(), None);
@ -191,7 +223,7 @@ mod test {
list.push(3);
// Check normal removal
assert_eq!(list.pop(), Some(3));
assert_eq!(list.pop(), Some(1));
assert_eq!(list.pop(), Some(2));
// Push some more just to make sure nothing's corrupted
@ -199,63 +231,128 @@ mod test {
list.push(5);
// Check normal removal
assert_eq!(list.pop(), Some(5));
assert_eq!(list.pop(), Some(3));
assert_eq!(list.pop(), Some(4));
// Check exhaustion
assert_eq!(list.pop(), Some(1));
assert_eq!(list.pop(), Some(5));
assert_eq!(list.pop(), None);
}
#[test]
fn peek() {
let mut list = List::new();
let mut list = List::default();
assert_eq!(list.peek(), None);
assert_eq!(list.peek_mut(), None);
list.push(1); list.push(2); list.push(3);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.peek(), Some(&3));
assert_eq!(list.peek_mut(), Some(&mut 3));
list.peek_mut().map(|value| {
*value = 42
});
assert_eq!(list.peek(), Some(&42));
assert_eq!(list.pop(), Some(42));
assert_eq!(list.peek(), Some(&1));
assert_eq!(list.peek_mut(), Some(&mut 1));
}
#[test]
fn into_iter() {
let mut list = List::new();
list.push(1); list.push(2); list.push(3);
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.into_iter();
assert_eq!(iter.next(), Some(3));
assert_eq!(iter.next(), Some(2));
assert_eq!(iter.next(), Some(1));
assert_eq!(iter.next(), Some(2));
assert_eq!(iter.next(), Some(3));
assert_eq!(iter.next(), None);
}
#[test]
fn iter() {
let mut list = List::new();
list.push(1); list.push(2); list.push(3);
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.iter();
assert_eq!(iter.next(), Some(&3));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.next(), Some(&1));
assert_eq!(iter.next(), Some(&2));
assert_eq!(iter.next(), Some(&3));
}
#[test]
fn iter_mut() {
let mut list = List::new();
list.push(1); list.push(2); list.push(3);
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
let mut iter = list.iter_mut();
assert_eq!(iter.next(), Some(&mut 3));
assert_eq!(iter.next(), Some(&mut 2));
assert_eq!(iter.next(), Some(&mut 1));
assert_eq!(iter.next(), Some(&mut 2));
assert_eq!(iter.next(), Some(&mut 3));
}
#[test]
fn contains_test() {
let mut list = List::default();
assert_eq!(list.peek(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.contains(&1), true);
assert_eq!(list.contains(&4), false);
}
#[test]
fn remove_test() {
let mut list = List::default();
assert_eq!(list.peek(), None);
list.push(1);
list.push(2);
list.push(3);
assert_eq!(list.contains(&2), true);
list.remove(2);
assert_eq!(list.contains(&2), false);
assert_eq!(list.pop(), Option::Some(1));
assert_eq!(list.pop(), Option::Some(3));
assert_eq!(list.peek(), Option::None);
}
#[test]
fn miri_test() {
let mut list = List::default();
list.push(1);
list.push(2);
list.push(3);
assert!(list.pop() == Some(1));
list.push(4);
assert!(list.pop() == Some(2));
list.push(5);
assert!(list.peek() == Some(&3));
list.push(6);
list.peek_mut().map(|x| *x *= 10);
assert!(list.peek() == Some(&30));
assert!(list.pop() == Some(30));
for elem in list.iter_mut() {
*elem *= 100;
}
let mut iter = list.iter();
assert_eq!(iter.next(), Some(&400));
assert_eq!(iter.next(), Some(&500));
assert_eq!(iter.next(), Some(&600));
assert_eq!(iter.next(), None);
assert_eq!(iter.next(), None);
assert!(list.pop() == Some(400));
list.peek_mut().map(|x| *x *= 10);
assert!(list.peek() == Some(&5000));
list.push(7);
}
}