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/master/")]
19 #![feature(macro_rules, phase, globs, thread_local, managed_boxes, asm)]
20 #![feature(linkage, lang_items, unsafe_destructor, default_type_params)]
21 #![feature(import_shadowing)]
25 #[phase(plugin, link)] extern crate core;
28 extern crate collections;
30 #[cfg(test)] extern crate "rustrt" as realrustrt;
31 #[cfg(test)] extern crate test;
32 #[cfg(test)] extern crate native;
34 #[cfg(test)] #[phase(plugin, link)] extern crate std;
36 pub use self::util::{Stdio, Stdout, Stderr};
37 pub use self::unwind::{begin_unwind, begin_unwind_fmt};
41 use alloc::boxed::Box;
44 use task::{Task, BlockedTask, TaskOpts};
50 mod thread_local_storage;
68 /// The interface to the current runtime.
70 /// This trait is used as the abstraction between 1:1 and M:N scheduling. The
71 /// two independent crates, libnative and libgreen, both have objects which
72 /// implement this trait. The goal of this trait is to encompass all the
73 /// fundamental differences in functionality between the 1:1 and M:N runtime
76 // Necessary scheduling functions, used for channels and blocking I/O
78 fn yield_now(self: Box<Self>, cur_task: Box<Task>);
79 fn maybe_yield(self: Box<Self>, cur_task: Box<Task>);
80 fn deschedule(self: Box<Self>,
83 f: |BlockedTask| -> Result<(), BlockedTask>);
84 fn reawaken(self: Box<Self>, to_wake: Box<Task>);
86 // Miscellaneous calls which are very different depending on what context
88 fn spawn_sibling(self: Box<Self>,
92 fn local_io<'a>(&'a mut self) -> Option<rtio::LocalIo<'a>>;
93 /// The (low, high) edges of the current stack.
94 fn stack_bounds(&self) -> (uint, uint); // (lo, hi)
95 fn can_block(&self) -> bool;
97 // FIXME: This is a serious code smell and this should not exist at all.
98 fn wrap(self: Box<Self>) -> Box<Any+'static>;
101 /// The default error code of the rust runtime if the main task fails instead
102 /// of exiting cleanly.
103 pub static DEFAULT_ERROR_CODE: int = 101;
105 /// One-time runtime initialization.
107 /// Initializes global state, including frobbing
108 /// the crate's logging flags, registering GC
109 /// metadata, and storing the process arguments.
110 pub fn init(argc: int, argv: *const *const u8) {
111 // FIXME: Derefing these pointers is not safe.
112 // Need to propagate the unsafety to `start`.
114 args::init(argc, argv);
119 // FIXME(#14344) this shouldn't be necessary
120 collections::fixme_14344_be_sure_to_link_to_collections();
121 alloc::fixme_14344_be_sure_to_link_to_collections();
122 libc::issue_14344_workaround();
125 /// Enqueues a procedure to run when the runtime is cleaned up
127 /// The procedure passed to this function will be executed as part of the
128 /// runtime cleanup phase. For normal rust programs, this means that it will run
129 /// after all other tasks have exited.
131 /// The procedure is *not* executed with a local `Task` available to it, so
132 /// primitives like logging, I/O, channels, spawning, etc, are *not* available.
133 /// This is meant for "bare bones" usage to clean up runtime details, this is
134 /// not meant as a general-purpose "let's clean everything up" function.
136 /// It is forbidden for procedures to register more `at_exit` handlers when they
137 /// are running, and doing so will lead to a process abort.
138 pub fn at_exit(f: proc():Send) {
139 at_exit_imp::push(f);
142 /// One-time runtime cleanup.
144 /// This function is unsafe because it performs no checks to ensure that the
145 /// runtime has completely ceased running. It is the responsibility of the
146 /// caller to ensure that the runtime is entirely shut down and nothing will be
147 /// poking around at the internal components.
149 /// Invoking cleanup while portions of the runtime are still in use may cause
150 /// undefined behavior.
151 pub unsafe fn cleanup() {
152 bookkeeping::wait_for_other_tasks();
155 local_ptr::cleanup();
158 // FIXME: these probably shouldn't be public...
160 pub mod shouldnt_be_public {
162 pub use super::local_ptr::native::maybe_tls_key;
163 #[cfg(not(windows), not(target_os = "android"), not(target_os = "ios"))]
164 pub use super::local_ptr::compiled::RT_TLS_PTR;
169 pub use core::{fmt, option, cmp};