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use crate::fs::OpenOptions;
use crate::io;
use crate::io::Result;
use crate::io::SeekFrom;
use crate::io::{BufRead, Read, Seek, Write};
use crate::os::unix::io::AsRawFd;
use crate::sys_common::io::test::tmpdir;
#[test]
fn copy_specialization() -> Result<()> {
use crate::io::{BufReader, BufWriter};
let tmp_path = tmpdir();
let source_path = tmp_path.join("copy-spec.source");
let sink_path = tmp_path.join("copy-spec.sink");
let result: Result<()> = try {
let mut source = crate::fs::OpenOptions::new()
.read(true)
.write(true)
.create(true)
.truncate(true)
.open(&source_path)?;
source.write_all(b"abcdefghiklmnopqr")?;
source.seek(SeekFrom::Start(8))?;
let mut source = BufReader::with_capacity(8, source.take(5));
source.fill_buf()?;
assert_eq!(source.buffer(), b"iklmn");
source.get_mut().set_limit(6);
source.get_mut().get_mut().seek(SeekFrom::Start(1))?; // "bcdefg"
let mut source = source.take(10); // "iklmnbcdef"
let mut sink = crate::fs::OpenOptions::new()
.read(true)
.write(true)
.create(true)
.truncate(true)
.open(&sink_path)?;
sink.write_all(b"000000")?;
let mut sink = BufWriter::with_capacity(5, sink);
sink.write_all(b"wxyz")?;
assert_eq!(sink.buffer(), b"wxyz");
let copied = crate::io::copy(&mut source, &mut sink)?;
assert_eq!(copied, 10, "copy obeyed limit imposed by Take");
assert_eq!(sink.buffer().len(), 0, "sink buffer was flushed");
assert_eq!(source.limit(), 0, "outer Take was exhausted");
assert_eq!(source.get_ref().buffer().len(), 0, "source buffer should be drained");
assert_eq!(
source.get_ref().get_ref().limit(),
1,
"inner Take allowed reading beyond end of file, some bytes should be left"
);
let mut sink = sink.into_inner()?;
sink.seek(SeekFrom::Start(0))?;
let mut copied = Vec::new();
sink.read_to_end(&mut copied)?;
assert_eq!(&copied, b"000000wxyziklmnbcdef");
};
let rm1 = crate::fs::remove_file(source_path);
let rm2 = crate::fs::remove_file(sink_path);
result.and(rm1).and(rm2)
}
#[test]
fn copies_append_mode_sink() -> Result<()> {
let tmp_path = tmpdir();
let source_path = tmp_path.join("copies_append_mode.source");
let sink_path = tmp_path.join("copies_append_mode.sink");
let mut source =
OpenOptions::new().create(true).truncate(true).write(true).read(true).open(&source_path)?;
write!(source, "not empty")?;
source.seek(SeekFrom::Start(0))?;
let mut sink = OpenOptions::new().create(true).append(true).open(&sink_path)?;
let copied = crate::io::copy(&mut source, &mut sink)?;
assert_eq!(copied, 9);
Ok(())
}
#[bench]
fn bench_file_to_file_copy(b: &mut test::Bencher) {
const BYTES: usize = 128 * 1024;
let temp_path = tmpdir();
let src_path = temp_path.join("file-copy-bench-src");
let mut src = crate::fs::OpenOptions::new()
.create(true)
.truncate(true)
.read(true)
.write(true)
.open(src_path)
.unwrap();
src.write(&vec![0u8; BYTES]).unwrap();
let sink_path = temp_path.join("file-copy-bench-sink");
let mut sink = crate::fs::OpenOptions::new()
.create(true)
.truncate(true)
.write(true)
.open(sink_path)
.unwrap();
b.bytes = BYTES as u64;
b.iter(|| {
src.seek(SeekFrom::Start(0)).unwrap();
sink.seek(SeekFrom::Start(0)).unwrap();
assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
});
}
#[bench]
fn bench_file_to_socket_copy(b: &mut test::Bencher) {
const BYTES: usize = 128 * 1024;
let temp_path = tmpdir();
let src_path = temp_path.join("pipe-copy-bench-src");
let mut src = OpenOptions::new()
.create(true)
.truncate(true)
.read(true)
.write(true)
.open(src_path)
.unwrap();
src.write(&vec![0u8; BYTES]).unwrap();
let sink_drainer = crate::net::TcpListener::bind("localhost:0").unwrap();
let mut sink = crate::net::TcpStream::connect(sink_drainer.local_addr().unwrap()).unwrap();
let mut sink_drainer = sink_drainer.accept().unwrap().0;
crate::thread::spawn(move || {
let mut sink_buf = vec![0u8; 1024 * 1024];
loop {
sink_drainer.read(&mut sink_buf[..]).unwrap();
}
});
b.bytes = BYTES as u64;
b.iter(|| {
src.seek(SeekFrom::Start(0)).unwrap();
assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
});
}
#[bench]
fn bench_file_to_uds_copy(b: &mut test::Bencher) {
const BYTES: usize = 128 * 1024;
let temp_path = tmpdir();
let src_path = temp_path.join("uds-copy-bench-src");
let mut src = OpenOptions::new()
.create(true)
.truncate(true)
.read(true)
.write(true)
.open(src_path)
.unwrap();
src.write(&vec![0u8; BYTES]).unwrap();
let (mut sink, mut sink_drainer) = crate::os::unix::net::UnixStream::pair().unwrap();
crate::thread::spawn(move || {
let mut sink_buf = vec![0u8; 1024 * 1024];
loop {
sink_drainer.read(&mut sink_buf[..]).unwrap();
}
});
b.bytes = BYTES as u64;
b.iter(|| {
src.seek(SeekFrom::Start(0)).unwrap();
assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
});
}
#[cfg(any(target_os = "linux", target_os = "android"))]
#[bench]
fn bench_socket_pipe_socket_copy(b: &mut test::Bencher) {
use super::CopyResult;
use crate::io::ErrorKind;
use crate::process::{ChildStdin, ChildStdout};
use crate::sys_common::FromInner;
let (read_end, write_end) = crate::sys::pipe::anon_pipe().unwrap();
let mut read_end = ChildStdout::from_inner(read_end);
let write_end = ChildStdin::from_inner(write_end);
let acceptor = crate::net::TcpListener::bind("localhost:0").unwrap();
let mut remote_end = crate::net::TcpStream::connect(acceptor.local_addr().unwrap()).unwrap();
let local_end = crate::sync::Arc::new(acceptor.accept().unwrap().0);
// the data flow in this benchmark:
//
// socket(tx) local_source
// remote_end (write) +--------> (splice to)
// write_end
// +
// |
// | pipe
// v
// read_end
// remote_end (read) <---------+ (splice to) *
// socket(rx) local_end
//
// * benchmark loop using io::copy
crate::thread::spawn(move || {
let mut sink_buf = vec![0u8; 1024 * 1024];
remote_end.set_nonblocking(true).unwrap();
loop {
match remote_end.write(&mut sink_buf[..]) {
Err(err) if err.kind() == ErrorKind::WouldBlock => {}
Ok(_) => {}
err => {
err.expect("write failed");
}
};
match remote_end.read(&mut sink_buf[..]) {
Err(err) if err.kind() == ErrorKind::WouldBlock => {}
Ok(_) => {}
err => {
err.expect("read failed");
}
};
}
});
// check that splice works, otherwise the benchmark would hang
let probe = super::sendfile_splice(
super::SpliceMode::Splice,
local_end.as_raw_fd(),
write_end.as_raw_fd(),
1,
);
match probe {
CopyResult::Ended(1) => {
// splice works
}
_ => {
eprintln!("splice failed, skipping benchmark");
return;
}
}
let local_source = local_end.clone();
crate::thread::spawn(move || {
loop {
super::sendfile_splice(
super::SpliceMode::Splice,
local_source.as_raw_fd(),
write_end.as_raw_fd(),
u64::MAX,
);
}
});
const BYTES: usize = 128 * 1024;
b.bytes = BYTES as u64;
b.iter(|| {
assert_eq!(
BYTES as u64,
io::copy(&mut (&mut read_end).take(BYTES as u64), &mut &*local_end).unwrap()
);
});
}
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