d464422c0a
but keep them enabled by default to maintain the status quo. When disabled shaves ~56KB off every x86_64-unknown-linux-gnu binary. To disable backtraces you have to use a config.toml (see src/bootstrap/config.toml.example for details) when building rustc/std: $ python bootstrap.py --config=config.toml
119 lines
3.4 KiB
Rust
119 lines
3.4 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![allow(missing_docs)]
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use boxed::Box;
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use sync::Once;
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use sys;
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macro_rules! rtabort {
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($($t:tt)*) => (::sys_common::util::abort(format_args!($($t)*)))
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}
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macro_rules! rtassert {
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($e:expr) => ({
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if !$e {
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rtabort!(concat!("assertion failed: ", stringify!($e)))
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}
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})
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}
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pub mod args;
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pub mod at_exit_imp;
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#[cfg(feature = "backtrace")]
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pub mod backtrace;
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pub mod condvar;
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pub mod io;
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pub mod mutex;
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pub mod net;
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pub mod poison;
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pub mod remutex;
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pub mod rwlock;
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pub mod thread;
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pub mod thread_info;
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pub mod thread_local;
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pub mod util;
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pub mod wtf8;
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#[cfg(feature = "backtrace")]
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#[cfg(any(all(unix, not(any(target_os = "macos", target_os = "ios", target_os = "emscripten"))),
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all(windows, target_env = "gnu")))]
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pub mod gnu;
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// common error constructors
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/// A trait for viewing representations from std types
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#[doc(hidden)]
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pub trait AsInner<Inner: ?Sized> {
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fn as_inner(&self) -> &Inner;
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}
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/// A trait for viewing representations from std types
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#[doc(hidden)]
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pub trait AsInnerMut<Inner: ?Sized> {
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fn as_inner_mut(&mut self) -> &mut Inner;
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}
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/// A trait for extracting representations from std types
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#[doc(hidden)]
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pub trait IntoInner<Inner> {
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fn into_inner(self) -> Inner;
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}
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/// A trait for creating std types from internal representations
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#[doc(hidden)]
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pub trait FromInner<Inner> {
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fn from_inner(inner: Inner) -> Self;
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}
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/// Enqueues a procedure to run when the main thread exits.
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///
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/// Currently these closures are only run once the main *Rust* thread exits.
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/// Once the `at_exit` handlers begin running, more may be enqueued, but not
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/// infinitely so. Eventually a handler registration will be forced to fail.
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///
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/// Returns `Ok` if the handler was successfully registered, meaning that the
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/// closure will be run once the main thread exits. Returns `Err` to indicate
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/// that the closure could not be registered, meaning that it is not scheduled
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/// to be run.
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pub fn at_exit<F: FnOnce() + Send + 'static>(f: F) -> Result<(), ()> {
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if at_exit_imp::push(Box::new(f)) {Ok(())} else {Err(())}
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}
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/// One-time runtime cleanup.
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pub fn cleanup() {
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static CLEANUP: Once = Once::new();
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CLEANUP.call_once(|| unsafe {
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args::cleanup();
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sys::stack_overflow::cleanup();
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at_exit_imp::cleanup();
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});
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}
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// Computes (value*numer)/denom without overflow, as long as both
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// (numer*denom) and the overall result fit into i64 (which is the case
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// for our time conversions).
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#[allow(dead_code)] // not used on all platforms
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pub fn mul_div_u64(value: u64, numer: u64, denom: u64) -> u64 {
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let q = value / denom;
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let r = value % denom;
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// Decompose value as (value/denom*denom + value%denom),
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// substitute into (value*numer)/denom and simplify.
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// r < denom, so (denom*numer) is the upper bound of (r*numer)
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q * numer + r * numer / denom
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}
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#[test]
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fn test_muldiv() {
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assert_eq!(mul_div_u64( 1_000_000_000_001, 1_000_000_000, 1_000_000),
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1_000_000_000_001_000);
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}
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