1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![crate_name = "rustrt"]
12 #![license = "MIT/ASL2"]
13 #![crate_type = "rlib"]
14 #![crate_type = "dylib"]
15 #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
16 html_favicon_url = "http://www.rust-lang.org/favicon.ico",
17 html_root_url = "http://doc.rust-lang.org/nightly/")]
19 #![allow(unknown_features)]
20 #![feature(macro_rules, phase, globs, thread_local, asm)]
21 #![feature(linkage, lang_items, unsafe_destructor, default_type_params)]
22 #![feature(import_shadowing, slicing_syntax)]
26 #[phase(plugin, link)] extern crate core;
29 extern crate collections;
31 #[cfg(test)] extern crate "rustrt" as realrustrt;
32 #[cfg(test)] extern crate test;
33 #[cfg(test)] extern crate native;
35 #[cfg(test)] #[phase(plugin, link)] extern crate std;
37 pub use self::util::{Stdio, Stdout, Stderr};
38 pub use self::unwind::{begin_unwind, begin_unwind_fmt};
42 use alloc::boxed::Box;
45 use task::{Task, BlockedTask, TaskOpts};
51 mod thread_local_storage;
69 /// The interface to the current runtime.
71 /// This trait is used as the abstraction between 1:1 and M:N scheduling. The
72 /// two independent crates, libnative and libgreen, both have objects which
73 /// implement this trait. The goal of this trait is to encompass all the
74 /// fundamental differences in functionality between the 1:1 and M:N runtime
77 // Necessary scheduling functions, used for channels and blocking I/O
79 fn yield_now(self: Box<Self>, cur_task: Box<Task>);
80 fn maybe_yield(self: Box<Self>, cur_task: Box<Task>);
81 fn deschedule(self: Box<Self>,
84 f: |BlockedTask| -> Result<(), BlockedTask>);
85 fn reawaken(self: Box<Self>, to_wake: Box<Task>);
87 // Miscellaneous calls which are very different depending on what context
89 fn spawn_sibling(self: Box<Self>,
93 fn local_io<'a>(&'a mut self) -> Option<rtio::LocalIo<'a>>;
94 /// The (low, high) edges of the current stack.
95 fn stack_bounds(&self) -> (uint, uint); // (lo, hi)
96 /// The last writable byte of the stack next to the guard page
97 fn stack_guard(&self) -> Option<uint>;
98 fn can_block(&self) -> bool;
100 // FIXME: This is a serious code smell and this should not exist at all.
101 fn wrap(self: Box<Self>) -> Box<Any+'static>;
104 /// The default error code of the rust runtime if the main task panics instead
105 /// of exiting cleanly.
106 pub const DEFAULT_ERROR_CODE: int = 101;
108 /// One-time runtime initialization.
110 /// Initializes global state, including frobbing the crate's logging flags,
111 /// and storing the process arguments.
112 pub fn init(argc: int, argv: *const *const u8) {
113 // FIXME: Derefing these pointers is not safe.
114 // Need to propagate the unsafety to `start`.
116 args::init(argc, argv);
122 // FIXME(#14344) this shouldn't be necessary
123 collections::fixme_14344_be_sure_to_link_to_collections();
124 alloc::fixme_14344_be_sure_to_link_to_collections();
125 libc::issue_14344_workaround();
128 /// Enqueues a procedure to run when the runtime is cleaned up
130 /// The procedure passed to this function will be executed as part of the
131 /// runtime cleanup phase. For normal rust programs, this means that it will run
132 /// after all other tasks have exited.
134 /// The procedure is *not* executed with a local `Task` available to it, so
135 /// primitives like logging, I/O, channels, spawning, etc, are *not* available.
136 /// This is meant for "bare bones" usage to clean up runtime details, this is
137 /// not meant as a general-purpose "let's clean everything up" function.
139 /// It is forbidden for procedures to register more `at_exit` handlers when they
140 /// are running, and doing so will lead to a process abort.
141 pub fn at_exit(f: proc():Send) {
142 at_exit_imp::push(f);
145 /// One-time runtime cleanup.
147 /// This function is unsafe because it performs no checks to ensure that the
148 /// runtime has completely ceased running. It is the responsibility of the
149 /// caller to ensure that the runtime is entirely shut down and nothing will be
150 /// poking around at the internal components.
152 /// Invoking cleanup while portions of the runtime are still in use may cause
153 /// undefined behavior.
154 pub unsafe fn cleanup() {
155 bookkeeping::wait_for_other_tasks();
159 local_ptr::cleanup();
162 // FIXME: these probably shouldn't be public...
164 pub mod shouldnt_be_public {
166 pub use super::local_ptr::native::maybe_tls_key;
167 #[cfg(all(not(windows), not(target_os = "android"), not(target_os = "ios")))]
168 pub use super::local_ptr::compiled::RT_TLS_PTR;
173 pub use core::{fmt, option, cmp};