64 lines
2.0 KiB
Rust
64 lines
2.0 KiB
Rust
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// Copyright 2013 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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//! Language-level runtime services that should reasonably expected
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//! to be available 'everywhere'. Local heaps, GC, unwinding,
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//! local storage, and logging. Even a 'freestanding' Rust would likely want
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//! to implement this.
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//! Local services may exist in at least three different contexts:
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//! when running as a task, when running in the scheduler's context,
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//! or when running outside of a scheduler but with local services
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//! (freestanding rust with local services?).
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use prelude::*;
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use super::sched::{Task, local_sched};
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pub struct LocalServices {
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heap: LocalHeap,
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gc: GarbageCollector,
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storage: LocalStorage,
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logger: Logger,
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unwinder: Unwinder
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}
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pub struct LocalHeap;
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pub struct GarbageCollector;
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pub struct LocalStorage;
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pub struct Logger;
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pub struct Unwinder;
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impl LocalServices {
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pub fn new() -> LocalServices {
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LocalServices {
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heap: LocalHeap,
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gc: GarbageCollector,
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storage: LocalStorage,
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logger: Logger,
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unwinder: Unwinder
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}
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}
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}
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/// Borrow a pointer to the installed local services.
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/// Fails (likely aborting the process) if local services are not available.
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pub fn borrow_local_services(f: &fn(&mut LocalServices)) {
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do local_sched::borrow |sched| {
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match sched.current_task {
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Some(~ref mut task) => {
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f(&mut task.local_services)
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}
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None => {
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fail!(~"no local services for schedulers yet")
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}
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}
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}
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}
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