/
lib.rs
170 lines (148 loc) · 5.56 KB
/
lib.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
// Copyright 2014 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.
#![crate_name = "rustrt"]
#![license = "MIT/ASL2"]
#![crate_type = "rlib"]
#![crate_type = "dylib"]
#![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
html_favicon_url = "http://www.rust-lang.org/favicon.ico",
html_root_url = "http://doc.rust-lang.org/master/")]
#![feature(macro_rules, phase, globs, thread_local, managed_boxes, asm)]
#![feature(linkage, lang_items, unsafe_destructor, default_type_params)]
#![feature(import_shadowing)]
#![no_std]
#![experimental]
#[phase(plugin, link)] extern crate core;
extern crate alloc;
extern crate libc;
extern crate collections;
#[cfg(test)] extern crate "rustrt" as realrustrt;
#[cfg(test)] extern crate test;
#[cfg(test)] extern crate native;
#[cfg(test)] #[phase(plugin, link)] extern crate std;
pub use self::util::{Stdio, Stdout, Stderr};
pub use self::unwind::{begin_unwind, begin_unwind_fmt};
use core::prelude::*;
use alloc::boxed::Box;
use core::any::Any;
use task::{Task, BlockedTask, TaskOpts};
mod macros;
mod at_exit_imp;
mod local_ptr;
mod thread_local_storage;
mod util;
mod libunwind;
pub mod args;
pub mod bookkeeping;
pub mod c_str;
pub mod exclusive;
pub mod local;
pub mod local_data;
pub mod local_heap;
pub mod mutex;
pub mod rtio;
pub mod stack;
pub mod task;
pub mod thread;
pub mod unwind;
/// The interface to the current runtime.
///
/// This trait is used as the abstraction between 1:1 and M:N scheduling. The
/// two independent crates, libnative and libgreen, both have objects which
/// implement this trait. The goal of this trait is to encompass all the
/// fundamental differences in functionality between the 1:1 and M:N runtime
/// modes.
pub trait Runtime {
// Necessary scheduling functions, used for channels and blocking I/O
// (sometimes).
fn yield_now(self: Box<Self>, cur_task: Box<Task>);
fn maybe_yield(self: Box<Self>, cur_task: Box<Task>);
fn deschedule(self: Box<Self>,
times: uint,
cur_task: Box<Task>,
f: |BlockedTask| -> Result<(), BlockedTask>);
fn reawaken(self: Box<Self>, to_wake: Box<Task>);
// Miscellaneous calls which are very different depending on what context
// you're in.
fn spawn_sibling(self: Box<Self>,
cur_task: Box<Task>,
opts: TaskOpts,
f: proc():Send);
fn local_io<'a>(&'a mut self) -> Option<rtio::LocalIo<'a>>;
/// The (low, high) edges of the current stack.
fn stack_bounds(&self) -> (uint, uint); // (lo, hi)
fn can_block(&self) -> bool;
// FIXME: This is a serious code smell and this should not exist at all.
fn wrap(self: Box<Self>) -> Box<Any+'static>;
}
/// The default error code of the rust runtime if the main task fails instead
/// of exiting cleanly.
pub static DEFAULT_ERROR_CODE: int = 101;
/// One-time runtime initialization.
///
/// Initializes global state, including frobbing
/// the crate's logging flags, registering GC
/// metadata, and storing the process arguments.
pub fn init(argc: int, argv: *const *const u8) {
// FIXME: Derefing these pointers is not safe.
// Need to propagate the unsafety to `start`.
unsafe {
args::init(argc, argv);
local_ptr::init();
at_exit_imp::init();
}
// FIXME(#14344) this shouldn't be necessary
collections::fixme_14344_be_sure_to_link_to_collections();
alloc::fixme_14344_be_sure_to_link_to_collections();
libc::issue_14344_workaround();
}
/// Enqueues a procedure to run when the runtime is cleaned up
///
/// The procedure passed to this function will be executed as part of the
/// runtime cleanup phase. For normal rust programs, this means that it will run
/// after all other tasks have exited.
///
/// The procedure is *not* executed with a local `Task` available to it, so
/// primitives like logging, I/O, channels, spawning, etc, are *not* available.
/// This is meant for "bare bones" usage to clean up runtime details, this is
/// not meant as a general-purpose "let's clean everything up" function.
///
/// It is forbidden for procedures to register more `at_exit` handlers when they
/// are running, and doing so will lead to a process abort.
pub fn at_exit(f: proc():Send) {
at_exit_imp::push(f);
}
/// One-time runtime cleanup.
///
/// This function is unsafe because it performs no checks to ensure that the
/// runtime has completely ceased running. It is the responsibility of the
/// caller to ensure that the runtime is entirely shut down and nothing will be
/// poking around at the internal components.
///
/// Invoking cleanup while portions of the runtime are still in use may cause
/// undefined behavior.
pub unsafe fn cleanup() {
bookkeeping::wait_for_other_tasks();
at_exit_imp::run();
args::cleanup();
local_ptr::cleanup();
}
// FIXME: these probably shouldn't be public...
#[doc(hidden)]
pub mod shouldnt_be_public {
#[cfg(not(test))]
pub use super::local_ptr::native::maybe_tls_key;
#[cfg(all(not(windows), not(target_os = "android"), not(target_os = "ios")))]
pub use super::local_ptr::compiled::RT_TLS_PTR;
}
#[cfg(not(test))]
mod std {
pub use core::{fmt, option, cmp};
}