Janis
9e3fa2cdb0
- `NextIf` iterator trait that yields the next element iff some predicate holds - `u64_from_u32s`, `u32s_from_u64`, `u32_from_u16s`, `u16s_from_u32` functions - moved `can_transmute` to `mem` module, added `is_same_size` and `is_aligned` functions - `copy_from` function for `TaggedAtomicPtr` - attempt at a sync queue? - `is_whitespace` function
84 lines
2.1 KiB
Rust
84 lines
2.1 KiB
Rust
use core::ops::{Deref, DerefMut};
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#[repr(transparent)]
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#[derive(Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Clone, Copy)]
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pub struct Send<T>(pub T);
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unsafe impl<T> core::marker::Send for Send<T> {}
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impl<T> Deref for Send<T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<T> DerefMut for Send<T> {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.0
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}
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}
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impl<T> Send<T> {
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pub unsafe fn new(value: T) -> Self {
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Self(value)
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}
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pub fn into_inner(self) -> T {
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self.0
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}
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}
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/// returns the number of available hardware threads, or 1 if it cannot be determined.
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#[cfg(feature = "std")]
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pub fn available_parallelism() -> usize {
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std::thread::available_parallelism()
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.map(|n| n.get())
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.unwrap_or(1)
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}
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#[cfg(feature = "std")]
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pub fn unwrap_or_panic<T>(result: std::thread::Result<T>) -> T {
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match result {
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Ok(value) => value,
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Err(payload) => std::panic::resume_unwind(payload),
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}
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}
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#[deprecated(
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since = "0.1.0",
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note = "use `can_transmute` from `mem` module instead"
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)]
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pub use super::mem::can_transmute;
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/// True if `c` is considered a whitespace according to Rust language definition.
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/// See [Rust language reference](https://doc.rust-lang.org/reference/whitespace.html)
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/// for definitions of these classes.
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pub fn is_whitespace(c: char) -> bool {
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// This is Pattern_White_Space.
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//
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// Note that this set is stable (ie, it doesn't change with different
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// Unicode versions), so it's ok to just hard-code the values.
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matches!(
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c,
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// Usual ASCII suspects
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'\u{0009}' // \t
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| '\u{000A}' // \n
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| '\u{000B}' // vertical tab
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| '\u{000C}' // form feed
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| '\u{000D}' // \r
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| '\u{0020}' // space
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// NEXT LINE from latin1
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| '\u{0085}'
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// Bidi markers
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| '\u{200E}' // LEFT-TO-RIGHT MARK
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| '\u{200F}' // RIGHT-TO-LEFT MARK
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// Dedicated whitespace characters from Unicode
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| '\u{2028}' // LINE SEPARATOR
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| '\u{2029}' // PARAGRAPH SEPARATOR
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)
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}
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