85 lines
1.8 KiB
Rust
85 lines
1.8 KiB
Rust
// run-pass
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// ignore-emscripten no processes
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// ignore-sgx no processes
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use std::env;
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use std::io::prelude::*;
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use std::process::Command;
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use std::thread;
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const THREADS: usize = 20;
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const WRITES: usize = 100;
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const WRITE_SIZE: usize = 1024 * 32;
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fn main() {
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let args = env::args().collect::<Vec<_>>();
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if args.len() == 1 {
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parent();
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} else {
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child();
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}
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}
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fn parent() {
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let me = env::current_exe().unwrap();
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let mut cmd = Command::new(me);
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cmd.arg("run-the-test");
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let output = cmd.output().unwrap();
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assert!(output.status.success());
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assert_eq!(output.stderr.len(), 0);
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assert_eq!(output.stdout.len(), WRITES * THREADS * WRITE_SIZE);
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for byte in output.stdout.iter() {
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assert_eq!(*byte, b'a');
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}
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}
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fn child() {
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let threads = (0..THREADS).map(|_| {
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thread::spawn(|| {
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let buf = [b'a'; WRITE_SIZE];
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for _ in 0..WRITES {
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write_all(&buf);
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}
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})
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}).collect::<Vec<_>>();
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for thread in threads {
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thread.join().unwrap();
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}
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}
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#[cfg(unix)]
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fn write_all(buf: &[u8]) {
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use std::fs::File;
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use std::mem;
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use std::os::unix::prelude::*;
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let mut file = unsafe { File::from_raw_fd(1) };
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let res = file.write_all(buf);
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mem::forget(file);
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res.unwrap();
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}
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#[cfg(windows)]
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fn write_all(buf: &[u8]) {
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use std::fs::File;
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use std::mem;
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use std::os::windows::raw::*;
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use std::os::windows::prelude::*;
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const STD_OUTPUT_HANDLE: u32 = (-11i32) as u32;
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extern "system" {
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fn GetStdHandle(handle: u32) -> HANDLE;
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}
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let mut file = unsafe {
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let handle = GetStdHandle(STD_OUTPUT_HANDLE);
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assert!(!handle.is_null());
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File::from_raw_handle(handle)
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};
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let res = file.write_all(buf);
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mem::forget(file);
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res.unwrap();
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}
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