1 use crate::env::temp_dir;
2 use crate::fs::OpenOptions;
5 use crate::io::SeekFrom;
6 use crate::io::{BufRead, Read, Seek, Write};
7 use crate::os::unix::io::AsRawFd;
10 fn copy_specialization() -> Result<()> {
11 use crate::io::{BufReader, BufWriter};
13 let path = crate::env::temp_dir();
14 let source_path = path.join("copy-spec.source");
15 let sink_path = path.join("copy-spec.sink");
17 let result: Result<()> = try {
18 let mut source = crate::fs::OpenOptions::new()
24 source.write_all(b"abcdefghiklmnopqr")?;
25 source.seek(SeekFrom::Start(8))?;
26 let mut source = BufReader::with_capacity(8, source.take(5));
28 assert_eq!(source.buffer(), b"iklmn");
29 source.get_mut().set_limit(6);
30 source.get_mut().get_mut().seek(SeekFrom::Start(1))?; // "bcdefg"
31 let mut source = source.take(10); // "iklmnbcdef"
33 let mut sink = crate::fs::OpenOptions::new()
39 sink.write_all(b"000000")?;
40 let mut sink = BufWriter::with_capacity(5, sink);
41 sink.write_all(b"wxyz")?;
42 assert_eq!(sink.buffer(), b"wxyz");
44 let copied = crate::io::copy(&mut source, &mut sink)?;
45 assert_eq!(copied, 10, "copy obeyed limit imposed by Take");
46 assert_eq!(sink.buffer().len(), 0, "sink buffer was flushed");
47 assert_eq!(source.limit(), 0, "outer Take was exhausted");
48 assert_eq!(source.get_ref().buffer().len(), 0, "source buffer should be drained");
50 source.get_ref().get_ref().limit(),
52 "inner Take allowed reading beyond end of file, some bytes should be left"
55 let mut sink = sink.into_inner()?;
56 sink.seek(SeekFrom::Start(0))?;
57 let mut copied = Vec::new();
58 sink.read_to_end(&mut copied)?;
59 assert_eq!(&copied, b"000000wxyziklmnbcdef");
62 let rm1 = crate::fs::remove_file(source_path);
63 let rm2 = crate::fs::remove_file(sink_path);
65 result.and(rm1).and(rm2)
69 fn bench_file_to_file_copy(b: &mut test::Bencher) {
70 const BYTES: usize = 128 * 1024;
71 let src_path = temp_dir().join("file-copy-bench-src");
72 let mut src = crate::fs::OpenOptions::new()
79 src.write(&vec![0u8; BYTES]).unwrap();
81 let sink_path = temp_dir().join("file-copy-bench-sink");
82 let mut sink = crate::fs::OpenOptions::new()
89 b.bytes = BYTES as u64;
91 src.seek(SeekFrom::Start(0)).unwrap();
92 sink.seek(SeekFrom::Start(0)).unwrap();
93 assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
98 fn bench_file_to_socket_copy(b: &mut test::Bencher) {
99 const BYTES: usize = 128 * 1024;
100 let src_path = temp_dir().join("pipe-copy-bench-src");
101 let mut src = OpenOptions::new()
108 src.write(&vec![0u8; BYTES]).unwrap();
110 let sink_drainer = crate::net::TcpListener::bind("localhost:0").unwrap();
111 let mut sink = crate::net::TcpStream::connect(sink_drainer.local_addr().unwrap()).unwrap();
112 let mut sink_drainer = sink_drainer.accept().unwrap().0;
114 crate::thread::spawn(move || {
115 let mut sink_buf = vec![0u8; 1024 * 1024];
117 sink_drainer.read(&mut sink_buf[..]).unwrap();
121 b.bytes = BYTES as u64;
123 src.seek(SeekFrom::Start(0)).unwrap();
124 assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
129 fn bench_file_to_uds_copy(b: &mut test::Bencher) {
130 const BYTES: usize = 128 * 1024;
131 let src_path = temp_dir().join("uds-copy-bench-src");
132 let mut src = OpenOptions::new()
139 src.write(&vec![0u8; BYTES]).unwrap();
141 let (mut sink, mut sink_drainer) = crate::os::unix::net::UnixStream::pair().unwrap();
143 crate::thread::spawn(move || {
144 let mut sink_buf = vec![0u8; 1024 * 1024];
146 sink_drainer.read(&mut sink_buf[..]).unwrap();
150 b.bytes = BYTES as u64;
152 src.seek(SeekFrom::Start(0)).unwrap();
153 assert_eq!(BYTES as u64, io::copy(&mut src, &mut sink).unwrap());
157 #[cfg(any(target_os = "linux", target_os = "android"))]
159 fn bench_socket_pipe_socket_copy(b: &mut test::Bencher) {
160 use super::CopyResult;
161 use crate::io::ErrorKind;
162 use crate::process::{ChildStdin, ChildStdout};
163 use crate::sys_common::FromInner;
165 let (read_end, write_end) = crate::sys::pipe::anon_pipe().unwrap();
167 let mut read_end = ChildStdout::from_inner(read_end);
168 let write_end = ChildStdin::from_inner(write_end);
170 let acceptor = crate::net::TcpListener::bind("localhost:0").unwrap();
171 let mut remote_end = crate::net::TcpStream::connect(acceptor.local_addr().unwrap()).unwrap();
173 let local_end = crate::sync::Arc::new(acceptor.accept().unwrap().0);
175 // the data flow in this benchmark:
177 // socket(tx) local_source
178 // remote_end (write) +--------> (splice to)
185 // remote_end (read) <---------+ (splice to) *
186 // socket(rx) local_end
188 // * benchmark loop using io::copy
190 crate::thread::spawn(move || {
191 let mut sink_buf = vec![0u8; 1024 * 1024];
192 remote_end.set_nonblocking(true).unwrap();
194 match remote_end.write(&mut sink_buf[..]) {
195 Err(err) if err.kind() == ErrorKind::WouldBlock => {}
198 err.expect("write failed");
201 match remote_end.read(&mut sink_buf[..]) {
202 Err(err) if err.kind() == ErrorKind::WouldBlock => {}
205 err.expect("read failed");
211 // check that splice works, otherwise the benchmark would hang
212 let probe = super::sendfile_splice(
213 super::SpliceMode::Splice,
214 local_end.as_raw_fd(),
215 write_end.as_raw_fd(),
220 CopyResult::Ended(1) => {
224 eprintln!("splice failed, skipping benchmark");
229 let local_source = local_end.clone();
230 crate::thread::spawn(move || {
232 super::sendfile_splice(
233 super::SpliceMode::Splice,
234 local_source.as_raw_fd(),
235 write_end.as_raw_fd(),
241 const BYTES: usize = 128 * 1024;
242 b.bytes = BYTES as u64;
246 io::copy(&mut (&mut read_end).take(BYTES as u64), &mut &*local_end).unwrap()