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use std::fmt::{self, Debug, Formatter, Display};
#[cfg(not(feature = "sync"))]
use std::cell::Cell;
#[cfg(feature = "sync")]
pub type AtomicCell<T> = ::crossbeam_utils::atomic::AtomicCell<T>;
#[cfg(not(feature = "sync"))]
#[derive(Default)]
pub struct AtomicCell<T>(Cell<T>);
#[cfg(not(feature = "sync"))]
impl<T: Copy> AtomicCell<T> {
pub const fn new(value: T) -> Self {
AtomicCell(Cell::new(value))
}
pub fn store(&self, value: T) {
self.0.set(value)
}
pub fn load(&self) -> T {
self.0.get()
}
pub fn compare_exchange(&self, expected: T, updated: T) -> Result<T, T>
where T: PartialEq {
let existing = self.0.get();
if existing == expected {
self.0.set(updated);
Ok(existing)
} else {
Err(existing)
}
}
}
#[derive(Clone)]
pub enum ThreadId {
#[allow(unused)]
Nop,
Enabled {
id: std::thread::ThreadId,
name: Option<String>
}
}
impl ThreadId {
pub fn current() -> ThreadId {
let thread = std::thread::current();
ThreadId::Enabled {
id: thread.id(),
name: thread.name().map(String::from)
}
}
}
impl slog::Value for ThreadId {
fn serialize(
&self, _record: &slog::Record,
key: &'static str,
serializer: &mut dyn slog::Serializer
) -> slog::Result<()> {
let (id, name) = match *self {
ThreadId::Nop => return Ok(()),
ThreadId::Enabled { ref id, ref name } => (id, name)
};
match *name {
Some(ref name) => {
serializer.emit_arguments(key, &format_args!(
"{}: {:?}", *name, id
))
},
None => {
serializer.emit_arguments(key, &format_args!(
"{:?}", id
))
},
}
}
}
impl Debug for ThreadId {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match *self {
ThreadId::Nop => f.write_str("ThreadId(??)"),
ThreadId::Enabled { id, name: None } => {
write!(f, "{:?}", id)
},
ThreadId::Enabled { id, name: Some(ref name) } => {
f.debug_tuple("ThreadId")
.field(&id)
.field(name)
.finish()
}
}
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub struct MemorySize {
pub bytes: usize
}
impl Display for MemorySize {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
if f.alternate() {
write!(f, "{}", self.bytes)
} else {
let bytes = self.bytes;
let (amount, suffix) = if bytes > 1024 * 1024 * 1024 {
(1024 * 1024 * 1024, "GB")
} else if bytes > 1024 * 1024 {
(1024 * 1024, "MB")
} else if bytes > 1024 {
(1024, "KB")
} else {
(1, "")
};
write!(f, "{:.2}{}", bytes as f64 / amount as f64, suffix)
}
}
}