mirror of
https://github.com/openharmony/third_party_rust_bytes.git
synced 2026-07-18 16:24:29 -04:00
Sean McArthur
c3f9cf1d72
Bytes is a useful tool for managing multiple slices into the same region of memory, and the other things it used to have been removed to reduce complexity. The exact strategy for managing the multiple references is no longer hard-coded, but instead backing by a customizable vtable. - Removed ability to mutate the underlying memory from the `Bytes` type. - Removed the "inline" (SBO) mechanism in `Bytes`. The reduces a large amount of complexity, and improves performance when accessing the slice of bytes, since a branch is no longer needed to check if the data is inline. - Removed `Bytes` knowledge of `BytesMut` (`BytesMut` may grow that knowledge back at a future point.)
74 lines
1.7 KiB
Rust
74 lines
1.7 KiB
Rust
// pretend to like `crate::`
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extern crate alloc;
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#[path = "../src/buf/mod.rs"]
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#[allow(warnings)]
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mod buf;
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#[path = "../src/debug.rs"]
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#[allow(warnings)]
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mod debug;
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#[path = "../src/bytes.rs"]
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#[allow(warnings)]
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mod bytes;
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#[path = "../src/bytes_mut.rs"]
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#[allow(warnings)]
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mod bytes_mut;
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use std::process::abort;
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use self::buf::{Buf, BufMut};
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use self::bytes::Bytes;
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use self::bytes_mut::BytesMut;
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use std::sync::Arc;
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use loom;
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use loom::thread;
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#[test]
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fn bytes_cloning_vec() {
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loom::model(|| {
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let a = Bytes::from(b"abcdefgh".to_vec());
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let addr = a.as_ptr() as usize;
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// test the Bytes::clone is Sync by putting it in an Arc
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let a1 = Arc::new(a);
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let a2 = a1.clone();
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let t1 = thread::spawn(move || {
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let b: Bytes = (*a1).clone();
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assert_eq!(b.as_ptr() as usize, addr);
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});
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let t2 = thread::spawn(move || {
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let b: Bytes = (*a2).clone();
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assert_eq!(b.as_ptr() as usize, addr);
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});
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t1.join().unwrap();
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t2.join().unwrap();
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});
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}
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#[test]
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fn bytes_mut_cloning_frozen() {
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loom::model(|| {
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let a = BytesMut::from(&b"abcdefgh"[..]).split().freeze();
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let addr = a.as_ptr() as usize;
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// test the Bytes::clone is Sync by putting it in an Arc
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let a1 = Arc::new(a);
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let a2 = a1.clone();
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let t1 = thread::spawn(move || {
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let b: Bytes = (*a1).clone();
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assert_eq!(b.as_ptr() as usize, addr);
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});
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let t2 = thread::spawn(move || {
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let b: Bytes = (*a2).clone();
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assert_eq!(b.as_ptr() as usize, addr);
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});
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t1.join().unwrap();
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t2.join().unwrap();
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});
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}
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