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#![warn(rust_2018_idioms, clippy::dbg_macro, clippy::print_stdout)]
use phper_sys::*;
use std::{
mem::{forget, size_of},
ops::{Deref, DerefMut},
};
pub trait EAllocatable {
fn free(ptr: *mut Self) {
unsafe {
_efree(ptr.cast());
}
}
}
pub struct EBox<T: EAllocatable> {
ptr: *mut T,
}
impl<T: EAllocatable> EBox<T> {
pub fn new(x: T) -> Self {
unsafe {
assert_ne!(size_of::<T>(), 0);
let ptr: *mut T = _emalloc(size_of::<T>()).cast();
ptr.write(x);
Self { ptr }
}
}
pub unsafe fn from_raw(raw: *mut T) -> Self {
Self { ptr: raw }
}
pub fn into_raw(b: EBox<T>) -> *mut T {
let ptr = b.ptr;
forget(b);
ptr
}
}
impl<T: EAllocatable> Deref for EBox<T> {
type Target = T;
fn deref(&self) -> &Self::Target {
unsafe { self.ptr.as_ref().unwrap() }
}
}
impl<T: EAllocatable> DerefMut for EBox<T> {
fn deref_mut(&mut self) -> &mut Self::Target {
unsafe { self.ptr.as_mut().unwrap() }
}
}
impl<T: EAllocatable> Drop for EBox<T> {
fn drop(&mut self) {
<T>::free(self.ptr);
}
}
unsafe impl<T: EAllocatable> Send for EBox<T> {}