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Converting pids into a new type ContextId

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Keeping pid (and file descriptor, and scheme id, ...) as usize is a
footgun. Let's remove it.
This commit is contained in:
David Teller 2016-11-13 15:36:52 +01:00
parent d16515ea12
commit 37a34ab7f7
10 changed files with 52 additions and 44 deletions
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7
kernel/context/mod.rs
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@ -1,11 +1,12 @@
//! Context management
use alloc::boxed::Box;
use core::sync::atomic::{AtomicUsize, ATOMIC_USIZE_INIT, Ordering};
use core::sync::atomic::Ordering;
use spin::{Once, RwLock, RwLockReadGuard, RwLockWriteGuard};
pub use self::context::{Context, Status};
pub use self::list::ContextList;
pub use self::switch::switch;
pub use context::context::ContextId;
/// Context struct
mod context;
@ -35,7 +36,7 @@ pub const CONTEXT_MAX_FILES: usize = 65536;
static CONTEXTS: Once<RwLock<ContextList>> = Once::new();
#[thread_local]
static CONTEXT_ID: AtomicUsize = ATOMIC_USIZE_INIT;
static CONTEXT_ID: context::AtomicContextId = context::AtomicContextId::default();
pub fn init() {
let mut contexts = contexts_mut();
@ -69,6 +70,6 @@ pub fn contexts_mut() -> RwLockWriteGuard<'static, ContextList> {
CONTEXTS.call_once(init_contexts).write()
}
pub fn context_id() -> usize {
pub fn context_id() -> context::ContextId {
CONTEXT_ID.load(Ordering::SeqCst)
}