53 lines
1.6 KiB
Rust
53 lines
1.6 KiB
Rust
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#![cfg(exhaustive)]
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use std::str;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::sync::Arc;
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use std::thread;
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#[test]
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fn test_exhaustive() {
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const BATCH_SIZE: u32 = 1_000_000;
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let counter = Arc::new(AtomicUsize::new(0));
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let finished = Arc::new(AtomicUsize::new(0));
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let mut workers = Vec::new();
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for _ in 0..num_cpus::get() {
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let counter = counter.clone();
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let finished = finished.clone();
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workers.push(thread::spawn(move || loop {
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let batch = counter.fetch_add(1, Ordering::Relaxed) as u32;
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if batch > u32::max_value() / BATCH_SIZE {
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return;
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}
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let min = batch * BATCH_SIZE;
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let max = if batch == u32::max_value() / BATCH_SIZE {
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u32::max_value()
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} else {
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min + BATCH_SIZE - 1
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};
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let mut bytes = [0u8; 24];
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let mut buffer = ryu::Buffer::new();
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for u in min..=max {
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let f = f32::from_bits(u);
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if !f.is_finite() {
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continue;
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}
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let n = unsafe { ryu::raw::format32(f, &mut bytes[0]) };
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assert_eq!(Ok(Ok(f)), str::from_utf8(&bytes[..n]).map(str::parse));
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assert_eq!(Ok(f), buffer.format_finite(f).parse());
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}
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let increment = (max - min + 1) as usize;
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let update = finished.fetch_add(increment, Ordering::Relaxed);
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println!("{}", update + increment);
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}));
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}
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for w in workers {
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w.join().unwrap();
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}
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}
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