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-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use io::prelude::*;
-
-use cell::RefCell;
-use fmt;
-use io::lazy::Lazy;
-use io::{self, Initializer, BufReader, LineWriter};
-use sync::{Arc, Mutex, MutexGuard};
-use sys::stdio;
-use sys_common::remutex::{ReentrantMutex, ReentrantMutexGuard};
-use thread::LocalKey;
-
-/// Stdout used by print! and println! macros
-thread_local! {
- static LOCAL_STDOUT: RefCell<Option<Box<dyn Write + Send>>> = {
- RefCell::new(None)
- }
-}
-
-/// A handle to a raw instance of the standard input stream of this process.
-///
-/// This handle is not synchronized or buffered in any fashion. Constructed via
-/// the `std::io::stdio::stdin_raw` function.
-struct StdinRaw(stdio::Stdin);
-
-/// A handle to a raw instance of the standard output stream of this process.
-///
-/// This handle is not synchronized or buffered in any fashion. Constructed via
-/// the `std::io::stdio::stdout_raw` function.
-struct StdoutRaw(stdio::Stdout);
-
-/// A handle to a raw instance of the standard output stream of this process.
-///
-/// This handle is not synchronized or buffered in any fashion. Constructed via
-/// the `std::io::stdio::stderr_raw` function.
-struct StderrRaw(stdio::Stderr);
-
-/// Constructs a new raw handle to the standard input of this process.
-///
-/// The returned handle does not interact with any other handles created nor
-/// handles returned by `std::io::stdin`. Data buffered by the `std::io::stdin`
-/// handles is **not** available to raw handles returned from this function.
-///
-/// The returned handle has no external synchronization or buffering.
-fn stdin_raw() -> io::Result<StdinRaw> { stdio::Stdin::new().map(StdinRaw) }
-
-/// Constructs a new raw handle to the standard output stream of this process.
-///
-/// The returned handle does not interact with any other handles created nor
-/// handles returned by `std::io::stdout`. Note that data is buffered by the
-/// `std::io::stdout` handles so writes which happen via this raw handle may
-/// appear before previous writes.
-///
-/// The returned handle has no external synchronization or buffering layered on
-/// top.
-fn stdout_raw() -> io::Result<StdoutRaw> { stdio::Stdout::new().map(StdoutRaw) }
-
-/// Constructs a new raw handle to the standard error stream of this process.
-///
-/// The returned handle does not interact with any other handles created nor
-/// handles returned by `std::io::stderr`.
-///
-/// The returned handle has no external synchronization or buffering layered on
-/// top.
-fn stderr_raw() -> io::Result<StderrRaw> { stdio::Stderr::new().map(StderrRaw) }
-
-impl Read for StdinRaw {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { self.0.read(buf) }
-
- #[inline]
- unsafe fn initializer(&self) -> Initializer {
- Initializer::nop()
- }
-}
-impl Write for StdoutRaw {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
- fn flush(&mut self) -> io::Result<()> { self.0.flush() }
-}
-impl Write for StderrRaw {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> { self.0.write(buf) }
- fn flush(&mut self) -> io::Result<()> { self.0.flush() }
-}
-
-enum Maybe<T> {
- Real(T),
- Fake,
-}
-
-impl<W: io::Write> io::Write for Maybe<W> {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- match *self {
- Maybe::Real(ref mut w) => handle_ebadf(w.write(buf), buf.len()),
- Maybe::Fake => Ok(buf.len())
- }
- }
-
- fn flush(&mut self) -> io::Result<()> {
- match *self {
- Maybe::Real(ref mut w) => handle_ebadf(w.flush(), ()),
- Maybe::Fake => Ok(())
- }
- }
-}
-
-impl<R: io::Read> io::Read for Maybe<R> {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- match *self {
- Maybe::Real(ref mut r) => handle_ebadf(r.read(buf), 0),
- Maybe::Fake => Ok(0)
- }
- }
-}
-
-fn handle_ebadf<T>(r: io::Result<T>, default: T) -> io::Result<T> {
- match r {
- Err(ref e) if stdio::is_ebadf(e) => Ok(default),
- r => r
- }
-}
-
-/// A handle to the standard input stream of a process.
-///
-/// Each handle is a shared reference to a global buffer of input data to this
-/// process. A handle can be `lock`'d to gain full access to [`BufRead`] methods
-/// (e.g. `.lines()`). Reads to this handle are otherwise locked with respect
-/// to other reads.
-///
-/// This handle implements the `Read` trait, but beware that concurrent reads
-/// of `Stdin` must be executed with care.
-///
-/// Created by the [`io::stdin`] method.
-///
-/// [`io::stdin`]: fn.stdin.html
-/// [`BufRead`]: trait.BufRead.html
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct Stdin {
- inner: Arc<Mutex<BufReader<Maybe<StdinRaw>>>>,
-}
-
-/// A locked reference to the `Stdin` handle.
-///
-/// This handle implements both the [`Read`] and [`BufRead`] traits, and
-/// is constructed via the [`Stdin::lock`] method.
-///
-/// [`Read`]: trait.Read.html
-/// [`BufRead`]: trait.BufRead.html
-/// [`Stdin::lock`]: struct.Stdin.html#method.lock
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct StdinLock<'a> {
- inner: MutexGuard<'a, BufReader<Maybe<StdinRaw>>>,
-}
-
-/// Constructs a new handle to the standard input of the current process.
-///
-/// Each handle returned is a reference to a shared global buffer whose access
-/// is synchronized via a mutex. If you need more explicit control over
-/// locking, see the [`lock() method`][lock].
-///
-/// [lock]: struct.Stdin.html#method.lock
-///
-/// # Examples
-///
-/// Using implicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Read};
-///
-/// fn main() -> io::Result<()> {
-/// let mut buffer = String::new();
-/// io::stdin().read_to_string(&mut buffer)?;
-/// Ok(())
-/// }
-/// ```
-///
-/// Using explicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Read};
-///
-/// fn main() -> io::Result<()> {
-/// let mut buffer = String::new();
-/// let stdin = io::stdin();
-/// let mut handle = stdin.lock();
-///
-/// handle.read_to_string(&mut buffer)?;
-/// Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn stdin() -> Stdin {
- static INSTANCE: Lazy<Mutex<BufReader<Maybe<StdinRaw>>>> = unsafe { Lazy::new(stdin_init) };
- return Stdin {
- inner: INSTANCE.get().expect("cannot access stdin during shutdown"),
- };
-
- fn stdin_init() -> Arc<Mutex<BufReader<Maybe<StdinRaw>>>> {
- // This must not reentrantly access `INSTANCE`
- let stdin = match stdin_raw() {
- Ok(stdin) => Maybe::Real(stdin),
- _ => Maybe::Fake
- };
-
- Arc::new(Mutex::new(BufReader::with_capacity(stdio::STDIN_BUF_SIZE, stdin)))
- }
-}
-
-impl Stdin {
- /// Locks this handle to the standard input stream, returning a readable
- /// guard.
- ///
- /// The lock is released when the returned lock goes out of scope. The
- /// returned guard also implements the [`Read`] and [`BufRead`] traits for
- /// accessing the underlying data.
- ///
- /// [`Read`]: trait.Read.html
- /// [`BufRead`]: trait.BufRead.html
- ///
- /// # Examples
- ///
- /// ```no_run
- /// use std::io::{self, Read};
- ///
- /// fn main() -> io::Result<()> {
- /// let mut buffer = String::new();
- /// let stdin = io::stdin();
- /// let mut handle = stdin.lock();
- ///
- /// handle.read_to_string(&mut buffer)?;
- /// Ok(())
- /// }
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn lock(&self) -> StdinLock {
- StdinLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
- }
-
- /// Locks this handle and reads a line of input into the specified buffer.
- ///
- /// For detailed semantics of this method, see the documentation on
- /// [`BufRead::read_line`].
- ///
- /// [`BufRead::read_line`]: trait.BufRead.html#method.read_line
- ///
- /// # Examples
- ///
- /// ```no_run
- /// use std::io;
- ///
- /// let mut input = String::new();
- /// match io::stdin().read_line(&mut input) {
- /// Ok(n) => {
- /// println!("{} bytes read", n);
- /// println!("{}", input);
- /// }
- /// Err(error) => println!("error: {}", error),
- /// }
- /// ```
- ///
- /// You can run the example one of two ways:
- ///
- /// - Pipe some text to it, e.g. `printf foo | path/to/executable`
- /// - Give it text interactively by running the executable directly,
- /// in which case it will wait for the Enter key to be pressed before
- /// continuing
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn read_line(&self, buf: &mut String) -> io::Result<usize> {
- self.lock().read_line(buf)
- }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Stdin {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("Stdin { .. }")
- }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl Read for Stdin {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- self.lock().read(buf)
- }
- #[inline]
- unsafe fn initializer(&self) -> Initializer {
- Initializer::nop()
- }
- fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
- self.lock().read_to_end(buf)
- }
- fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
- self.lock().read_to_string(buf)
- }
- fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
- self.lock().read_exact(buf)
- }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> Read for StdinLock<'a> {
- fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
- self.inner.read(buf)
- }
- #[inline]
- unsafe fn initializer(&self) -> Initializer {
- Initializer::nop()
- }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> BufRead for StdinLock<'a> {
- fn fill_buf(&mut self) -> io::Result<&[u8]> { self.inner.fill_buf() }
- fn consume(&mut self, n: usize) { self.inner.consume(n) }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl<'a> fmt::Debug for StdinLock<'a> {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("StdinLock { .. }")
- }
-}
-
-/// A handle to the global standard output stream of the current process.
-///
-/// Each handle shares a global buffer of data to be written to the standard
-/// output stream. Access is also synchronized via a lock and explicit control
-/// over locking is available via the [`lock`] method.
-///
-/// Created by the [`io::stdout`] method.
-///
-/// [`lock`]: #method.lock
-/// [`io::stdout`]: fn.stdout.html
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct Stdout {
- // FIXME: this should be LineWriter or BufWriter depending on the state of
- // stdout (tty or not). Note that if this is not line buffered it
- // should also flush-on-panic or some form of flush-on-abort.
- inner: Arc<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>>,
-}
-
-/// A locked reference to the `Stdout` handle.
-///
-/// This handle implements the [`Write`] trait, and is constructed via
-/// the [`Stdout::lock`] method.
-///
-/// [`Write`]: trait.Write.html
-/// [`Stdout::lock`]: struct.Stdout.html#method.lock
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct StdoutLock<'a> {
- inner: ReentrantMutexGuard<'a, RefCell<LineWriter<Maybe<StdoutRaw>>>>,
-}
-
-/// Constructs a new handle to the standard output of the current process.
-///
-/// Each handle returned is a reference to a shared global buffer whose access
-/// is synchronized via a mutex. If you need more explicit control over
-/// locking, see the [Stdout::lock] method.
-///
-/// [Stdout::lock]: struct.Stdout.html#method.lock
-///
-/// # Examples
-///
-/// Using implicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Write};
-///
-/// fn main() -> io::Result<()> {
-/// io::stdout().write(b"hello world")?;
-///
-/// Ok(())
-/// }
-/// ```
-///
-/// Using explicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Write};
-///
-/// fn main() -> io::Result<()> {
-/// let stdout = io::stdout();
-/// let mut handle = stdout.lock();
-///
-/// handle.write(b"hello world")?;
-///
-/// Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn stdout() -> Stdout {
- static INSTANCE: Lazy<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>>
- = unsafe { Lazy::new(stdout_init) };
- return Stdout {
- inner: INSTANCE.get().expect("cannot access stdout during shutdown"),
- };
-
- fn stdout_init() -> Arc<ReentrantMutex<RefCell<LineWriter<Maybe<StdoutRaw>>>>> {
- // This must not reentrantly access `INSTANCE`
- let stdout = match stdout_raw() {
- Ok(stdout) => Maybe::Real(stdout),
- _ => Maybe::Fake,
- };
- Arc::new(ReentrantMutex::new(RefCell::new(LineWriter::new(stdout))))
- }
-}
-
-impl Stdout {
- /// Locks this handle to the standard output stream, returning a writable
- /// guard.
- ///
- /// The lock is released when the returned lock goes out of scope. The
- /// returned guard also implements the `Write` trait for writing data.
- ///
- /// # Examples
- ///
- /// ```no_run
- /// use std::io::{self, Write};
- ///
- /// fn main() -> io::Result<()> {
- /// let stdout = io::stdout();
- /// let mut handle = stdout.lock();
- ///
- /// handle.write(b"hello world")?;
- ///
- /// Ok(())
- /// }
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn lock(&self) -> StdoutLock {
- StdoutLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
- }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Stdout {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("Stdout { .. }")
- }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl Write for Stdout {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.lock().write(buf)
- }
- fn flush(&mut self) -> io::Result<()> {
- self.lock().flush()
- }
- fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
- self.lock().write_all(buf)
- }
- fn write_fmt(&mut self, args: fmt::Arguments) -> io::Result<()> {
- self.lock().write_fmt(args)
- }
-}
-#[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> Write for StdoutLock<'a> {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.inner.borrow_mut().write(buf)
- }
- fn flush(&mut self) -> io::Result<()> {
- self.inner.borrow_mut().flush()
- }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl<'a> fmt::Debug for StdoutLock<'a> {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("StdoutLock { .. }")
- }
-}
-
-/// A handle to the standard error stream of a process.
-///
-/// For more information, see the [`io::stderr`] method.
-///
-/// [`io::stderr`]: fn.stderr.html
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct Stderr {
- inner: Arc<ReentrantMutex<RefCell<Maybe<StderrRaw>>>>,
-}
-
-/// A locked reference to the `Stderr` handle.
-///
-/// This handle implements the `Write` trait and is constructed via
-/// the [`Stderr::lock`] method.
-///
-/// [`Stderr::lock`]: struct.Stderr.html#method.lock
-#[stable(feature = "rust1", since = "1.0.0")]
-pub struct StderrLock<'a> {
- inner: ReentrantMutexGuard<'a, RefCell<Maybe<StderrRaw>>>,
-}
-
-/// Constructs a new handle to the standard error of the current process.
-///
-/// This handle is not buffered.
-///
-/// # Examples
-///
-/// Using implicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Write};
-///
-/// fn main() -> io::Result<()> {
-/// io::stderr().write(b"hello world")?;
-///
-/// Ok(())
-/// }
-/// ```
-///
-/// Using explicit synchronization:
-///
-/// ```no_run
-/// use std::io::{self, Write};
-///
-/// fn main() -> io::Result<()> {
-/// let stderr = io::stderr();
-/// let mut handle = stderr.lock();
-///
-/// handle.write(b"hello world")?;
-///
-/// Ok(())
-/// }
-/// ```
-#[stable(feature = "rust1", since = "1.0.0")]
-pub fn stderr() -> Stderr {
- static INSTANCE: Lazy<ReentrantMutex<RefCell<Maybe<StderrRaw>>>> =
- unsafe { Lazy::new(stderr_init) };
- return Stderr {
- inner: INSTANCE.get().expect("cannot access stderr during shutdown"),
- };
-
- fn stderr_init() -> Arc<ReentrantMutex<RefCell<Maybe<StderrRaw>>>> {
- // This must not reentrantly access `INSTANCE`
- let stderr = match stderr_raw() {
- Ok(stderr) => Maybe::Real(stderr),
- _ => Maybe::Fake,
- };
- Arc::new(ReentrantMutex::new(RefCell::new(stderr)))
- }
-}
-
-impl Stderr {
- /// Locks this handle to the standard error stream, returning a writable
- /// guard.
- ///
- /// The lock is released when the returned lock goes out of scope. The
- /// returned guard also implements the `Write` trait for writing data.
- ///
- /// # Examples
- ///
- /// ```
- /// use std::io::{self, Write};
- ///
- /// fn foo() -> io::Result<()> {
- /// let stderr = io::stderr();
- /// let mut handle = stderr.lock();
- ///
- /// handle.write(b"hello world")?;
- ///
- /// Ok(())
- /// }
- /// ```
- #[stable(feature = "rust1", since = "1.0.0")]
- pub fn lock(&self) -> StderrLock {
- StderrLock { inner: self.inner.lock().unwrap_or_else(|e| e.into_inner()) }
- }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl fmt::Debug for Stderr {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("Stderr { .. }")
- }
-}
-
-#[stable(feature = "rust1", since = "1.0.0")]
-impl Write for Stderr {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.lock().write(buf)
- }
- fn flush(&mut self) -> io::Result<()> {
- self.lock().flush()
- }
- fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
- self.lock().write_all(buf)
- }
- fn write_fmt(&mut self, args: fmt::Arguments) -> io::Result<()> {
- self.lock().write_fmt(args)
- }
-}
-#[stable(feature = "rust1", since = "1.0.0")]
-impl<'a> Write for StderrLock<'a> {
- fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
- self.inner.borrow_mut().write(buf)
- }
- fn flush(&mut self) -> io::Result<()> {
- self.inner.borrow_mut().flush()
- }
-}
-
-#[stable(feature = "std_debug", since = "1.16.0")]
-impl<'a> fmt::Debug for StderrLock<'a> {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- f.pad("StderrLock { .. }")
- }
-}
-
-/// Resets the thread-local stderr handle to the specified writer
-///
-/// This will replace the current thread's stderr handle, returning the old
-/// handle. All future calls to `panic!` and friends will emit their output to
-/// this specified handle.
-///
-/// Note that this does not need to be called for all new threads; the default
-/// output handle is to the process's stderr stream.
-#[unstable(feature = "set_stdio",
- reason = "this function may disappear completely or be replaced \
- with a more general mechanism",
- issue = "0")]
-#[doc(hidden)]
-pub fn set_panic(sink: Option<Box<dyn Write + Send>>) -> Option<Box<dyn Write + Send>> {
- use panicking::LOCAL_STDERR;
- use mem;
- LOCAL_STDERR.with(move |slot| {
- mem::replace(&mut *slot.borrow_mut(), sink)
- }).and_then(|mut s| {
- let _ = s.flush();
- Some(s)
- })
-}
-
-/// Resets the thread-local stdout handle to the specified writer
-///
-/// This will replace the current thread's stdout handle, returning the old
-/// handle. All future calls to `print!` and friends will emit their output to
-/// this specified handle.
-///
-/// Note that this does not need to be called for all new threads; the default
-/// output handle is to the process's stdout stream.
-#[unstable(feature = "set_stdio",
- reason = "this function may disappear completely or be replaced \
- with a more general mechanism",
- issue = "0")]
-#[doc(hidden)]
-pub fn set_print(sink: Option<Box<dyn Write + Send>>) -> Option<Box<dyn Write + Send>> {
- use mem;
- LOCAL_STDOUT.with(move |slot| {
- mem::replace(&mut *slot.borrow_mut(), sink)
- }).and_then(|mut s| {
- let _ = s.flush();
- Some(s)
- })
-}
-
-/// Write `args` to output stream `local_s` if possible, `global_s`
-/// otherwise. `label` identifies the stream in a panic message.
-///
-/// This function is used to print error messages, so it takes extra
-/// care to avoid causing a panic when `local_stream` is unusable.
-/// For instance, if the TLS key for the local stream is
-/// already destroyed, or if the local stream is locked by another
-/// thread, it will just fall back to the global stream.
-///
-/// However, if the actual I/O causes an error, this function does panic.
-fn print_to<T>(
- args: fmt::Arguments,
- local_s: &'static LocalKey<RefCell<Option<Box<dyn Write+Send>>>>,
- global_s: fn() -> T,
- label: &str,
-)
-where
- T: Write,
-{
- let result = local_s.try_with(|s| {
- if let Ok(mut borrowed) = s.try_borrow_mut() {
- if let Some(w) = borrowed.as_mut() {
- return w.write_fmt(args);
- }
- }
- global_s().write_fmt(args)
- }).unwrap_or_else(|_| {
- global_s().write_fmt(args)
- });
-
- if let Err(e) = result {
- panic!("failed printing to {}: {}", label, e);
- }
-}
-
-#[unstable(feature = "print_internals",
- reason = "implementation detail which may disappear or be replaced at any time",
- issue = "0")]
-#[doc(hidden)]
-pub fn _print(args: fmt::Arguments) {
- print_to(args, &LOCAL_STDOUT, stdout, "stdout");
-}
-
-#[unstable(feature = "print_internals",
- reason = "implementation detail which may disappear or be replaced at any time",
- issue = "0")]
-#[doc(hidden)]
-pub fn _eprint(args: fmt::Arguments) {
- use panicking::LOCAL_STDERR;
- print_to(args, &LOCAL_STDERR, stderr, "stderr");
-}
-
-#[cfg(test)]
-mod tests {
- use panic::{UnwindSafe, RefUnwindSafe};
- use thread;
- use super::*;
-
- #[test]
- fn stdout_unwind_safe() {
- assert_unwind_safe::<Stdout>();
- }
- #[test]
- fn stdoutlock_unwind_safe() {
- assert_unwind_safe::<StdoutLock>();
- assert_unwind_safe::<StdoutLock<'static>>();
- }
- #[test]
- fn stderr_unwind_safe() {
- assert_unwind_safe::<Stderr>();
- }
- #[test]
- fn stderrlock_unwind_safe() {
- assert_unwind_safe::<StderrLock>();
- assert_unwind_safe::<StderrLock<'static>>();
- }
-
- fn assert_unwind_safe<T: UnwindSafe + RefUnwindSafe>() {}
-
- #[test]
- #[cfg_attr(target_os = "emscripten", ignore)]
- fn panic_doesnt_poison() {
- thread::spawn(|| {
- let _a = stdin();
- let _a = _a.lock();
- let _a = stdout();
- let _a = _a.lock();
- let _a = stderr();
- let _a = _a.lock();
- panic!();
- }).join().unwrap_err();
-
- let _a = stdin();
- let _a = _a.lock();
- let _a = stdout();
- let _a = _a.lock();
- let _a = stderr();
- let _a = _a.lock();
- }
-}
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