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