irid-std 0.3.1

A replacement for std when running without a filesystem on the irid kernel
Documentation 
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use core::{fmt::{Debug, Display}, ops::{Deref, DerefMut}};

use spin::RwLock as SpinRwLock;

use crate::sync::{PoisonError, TryLockError};

#[derive(Debug, Default)]
pub struct RwLock<T: ?Sized> {
    lock: SpinRwLock<T>    
}

impl <T> From<T> for RwLock<T> {
    fn from(value: T) -> Self {
        Self::new(value)
    }
}

unsafe impl <T: ?Sized + Send> Send for RwLock<T> {
}

unsafe impl <T: ?Sized + Send> Sync for RwLock<T> {
}

impl <T> RwLock<T> {
    pub const fn new(value: T) -> Self {
        Self {
            lock: SpinRwLock::new(value)
        }
    }
} 

impl <T: ?Sized> RwLock<T> {
    pub fn write(&self) -> Result<RwLockWriteGuard<'_, T>, PoisonError<T>> {
        Ok(RwLockWriteGuard { guard: self.lock.write() })
    }
    
    pub fn read(&self) -> Result<RwLockReadGuard<'_, T>, PoisonError<T>> {
        Ok(RwLockReadGuard { guard: self.lock.read() })
    }
    
    pub fn try_write(&self) -> Result<RwLockWriteGuard<'_, T>, TryLockError<T>> {
        if let Some(guard) = self.lock.try_write() {
            Ok(RwLockWriteGuard { guard })
        } else {
            Err(TryLockError::WouldBlock)
        }
    }
    
    pub fn try_read(&self) -> Result<RwLockReadGuard<'_, T>, TryLockError<T>> {
        if let Some(guard) = self.lock.try_read() {
            Ok(RwLockReadGuard { guard })
        } else {
            Err(TryLockError::WouldBlock)
        }
    }

    pub fn is_poisoned(&self) -> bool {
        false
    }

    pub fn clear_poison(&self) {
    }

    pub fn into_inner(self) -> Result<T, PoisonError<T>> where T: Sized {
        Ok(self.lock.into_inner())
    }

    pub fn get_mut(&mut self) -> Result<&mut T, PoisonError<T>> {
        Ok(self.lock.get_mut())
    }
}

#[derive(Debug)]
pub struct RwLockWriteGuard<'a, T: ?Sized> {
    guard: spin::RwLockWriteGuard<'a, T>
}

impl <'a, T: Display> Display for RwLockWriteGuard<'a, T> {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        write!(f, "{}", &*self.guard)
    }
} 

unsafe impl <'a, T: ?Sized + Send> Sync for RwLockWriteGuard<'a, T> {
}

impl <'a, T: ?Sized> !Send for RwLockWriteGuard<'a, T> {
}

impl <'a, T: ?Sized> Deref for RwLockWriteGuard<'a, T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        &*self.guard
    }
}

impl <'a, T: ?Sized> DerefMut for RwLockWriteGuard<'a, T> {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut *self.guard
    }
}

#[derive(Debug)]
pub struct RwLockReadGuard<'a, T: ?Sized> {
    guard: spin::RwLockReadGuard<'a, T>
}

impl <'a, T: Display> Display for RwLockReadGuard<'a, T> {
    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
        write!(f, "{}", &*self.guard)
    }
} 

unsafe impl <'a, T: ?Sized + Send> Sync for RwLockReadGuard<'a, T> {
}

impl <'a, T: ?Sized> !Send for RwLockReadGuard<'a, T> {
}

impl <'a, T: ?Sized> Deref for RwLockReadGuard<'a, T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        &*self.guard
    }
}