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_id = "rustrt#0.11.0-pre"]
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/")]
18 #![feature(macro_rules, phase, globs, thread_local, managed_boxes, asm,
23 #[phase(plugin, link)] extern crate core;
26 extern crate collections;
28 #[cfg(test)] extern crate realrustrt = "rustrt";
29 #[cfg(test)] extern crate test;
30 #[cfg(test)] extern crate native;
32 #[cfg(test)] #[phase(plugin, link)] extern crate std;
34 pub use self::util::{Stdio, Stdout, Stderr};
35 pub use self::unwind::{begin_unwind, begin_unwind_fmt};
39 use alloc::owned::Box;
42 use task::{Task, BlockedTask, TaskOpts};
48 mod thread_local_storage;
66 /// The interface to the current runtime.
68 /// This trait is used as the abstraction between 1:1 and M:N scheduling. The
69 /// two independent crates, libnative and libgreen, both have objects which
70 /// implement this trait. The goal of this trait is to encompass all the
71 /// fundamental differences in functionality between the 1:1 and M:N runtime
74 // Necessary scheduling functions, used for channels and blocking I/O
76 fn yield_now(~self, cur_task: Box<Task>);
77 fn maybe_yield(~self, cur_task: Box<Task>);
78 fn deschedule(~self, times: uint, cur_task: Box<Task>,
79 f: |BlockedTask| -> Result<(), BlockedTask>);
80 fn reawaken(~self, to_wake: Box<Task>);
82 // Miscellaneous calls which are very different depending on what context
84 fn spawn_sibling(~self,
88 fn local_io<'a>(&'a mut self) -> Option<rtio::LocalIo<'a>>;
89 /// The (low, high) edges of the current stack.
90 fn stack_bounds(&self) -> (uint, uint); // (lo, hi)
91 fn can_block(&self) -> bool;
93 // FIXME: This is a serious code smell and this should not exist at all.
94 fn wrap(~self) -> Box<Any>;
97 /// The default error code of the rust runtime if the main task fails instead
98 /// of exiting cleanly.
99 pub static DEFAULT_ERROR_CODE: int = 101;
101 /// One-time runtime initialization.
103 /// Initializes global state, including frobbing
104 /// the crate's logging flags, registering GC
105 /// metadata, and storing the process arguments.
106 pub fn init(argc: int, argv: **u8) {
107 // FIXME: Derefing these pointers is not safe.
108 // Need to propagate the unsafety to `start`.
110 args::init(argc, argv);
115 // FIXME(#14344) this shouldn't be necessary
116 collections::fixme_14344_be_sure_to_link_to_collections();
117 alloc::fixme_14344_be_sure_to_link_to_collections();
118 libc::issue_14344_workaround();
121 /// Enqueues a procedure to run when the runtime is cleaned up
123 /// The procedure passed to this function will be executed as part of the
124 /// runtime cleanup phase. For normal rust programs, this means that it will run
125 /// after all other tasks have exited.
127 /// The procedure is *not* executed with a local `Task` available to it, so
128 /// primitives like logging, I/O, channels, spawning, etc, are *not* available.
129 /// This is meant for "bare bones" usage to clean up runtime details, this is
130 /// not meant as a general-purpose "let's clean everything up" function.
132 /// It is forbidden for procedures to register more `at_exit` handlers when they
133 /// are running, and doing so will lead to a process abort.
134 pub fn at_exit(f: proc():Send) {
135 at_exit_imp::push(f);
138 /// One-time runtime cleanup.
140 /// This function is unsafe because it performs no checks to ensure that the
141 /// runtime has completely ceased running. It is the responsibility of the
142 /// caller to ensure that the runtime is entirely shut down and nothing will be
143 /// poking around at the internal components.
145 /// Invoking cleanup while portions of the runtime are still in use may cause
146 /// undefined behavior.
147 pub unsafe fn cleanup() {
148 bookkeeping::wait_for_other_tasks();
151 local_ptr::cleanup();
154 // FIXME: these probably shouldn't be public...
156 pub mod shouldnt_be_public {
158 pub use super::local_ptr::native::maybe_tls_key;
159 #[cfg(not(windows), not(target_os = "android"))]
160 pub use super::local_ptr::compiled::RT_TLS_PTR;
165 pub use core::{fmt, option, cmp};