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//! Re-exports either the Rust `std` library or `core` and `alloc` when `std` is
//! disabled.
//!
//! `crate::stdlib::...` should be used rather than `std::` when adding code that
//! will be available with the standard library disabled.
//!
//! Note that this module is called `stdlib` rather than `std`, as Rust 1.34.0
//! does not permit redefining the name `stdlib` (although this works on the
//! latest stable Rust).
#[cfg(feature = "std")]
pub(crate) use std::*;
#[cfg(not(feature = "std"))]
pub(crate) use self::no_std::*;
#[cfg(not(feature = "std"))]
mod no_std {
// We pre-emptively export everything from libcore/liballoc, (even modules
// we aren't using currently) to make adding new code easier. Therefore,
// some of these imports will be unused.
#![allow(unused_imports)]
pub(crate) use core::{
any, array, ascii, cell, char, clone, cmp, convert, default, f32, f64, ffi, future, hash,
hint, i128, i16, i8, isize, iter, marker, mem, num, ops, option, pin, ptr, result, task,
time, u128, u16, u32, u8, usize,
};
pub(crate) use alloc::{boxed, collections, rc, string, vec};
pub(crate) mod borrow {
pub(crate) use alloc::borrow::*;
pub(crate) use core::borrow::*;
}
pub(crate) mod fmt {
pub(crate) use alloc::fmt::*;
pub(crate) use core::fmt::*;
}
pub(crate) mod slice {
pub(crate) use alloc::slice::*;
pub(crate) use core::slice::*;
}
pub(crate) mod str {
pub(crate) use alloc::str::*;
pub(crate) use core::str::*;
}
pub(crate) mod sync {
pub(crate) use crate::spin::MutexGuard;
pub(crate) use alloc::sync::*;
pub(crate) use core::sync::*;
/// This wraps `spin::Mutex` to return a `Result`, so that it can be
/// used with code written against `std::sync::Mutex`.
///
/// Since `spin::Mutex` doesn't support poisoning, the `Result` returned
/// by `lock` will always be `Ok`.
#[derive(Debug, Default)]
pub(crate) struct Mutex<T> {
inner: crate::spin::Mutex<T>,
}
impl<T> Mutex<T> {
// pub(crate) fn new(data: T) -> Self {
// Self {
// inner: crate::spin::Mutex::new(data),
// }
// }
pub(crate) fn lock(&self) -> Result<MutexGuard<'_, T>, ()> {
Ok(self.inner.lock())
}
}
}
}