mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add simple TLS implementation

Browse Source
This commit is contained in:
pjht 2024-06-04 15:36:29 -05:00
parent ed6f4e98d3
commit e5b6f47f9f
Signed by: pjht
GPG Key ID: 7B5F6AFBEC7EE78E
1 changed files with 17 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
library/std/src/sys/pal/mikros/thread_local_key.rs
View File

@ -1,21 +1,32 @@
use crate::{
ptr,
sync::atomic::{AtomicUsize, Ordering}
};
pub type Key = usize; pub type Key = usize;
static mut TLS_SLOTS: [*mut u8; 64] = [ptr::null_mut(); 64];
static NEXT_TLS: AtomicUsize = AtomicUsize::new(1);
#[inline] #[inline]
pub unsafe fn create(_dtor: Option<unsafe extern "C" fn(*mut u8)>) -> Key { pub unsafe fn create(_dtor: Option<unsafe extern "C" fn(*mut u8)>) -> Key {
panic!("should not be used on this target"); if NEXT_TLS.load(Ordering::Relaxed) == 65 {
panic!("Out of TLS slots");
}
NEXT_TLS.fetch_add(1, Ordering::Relaxed)
} }
#[inline] #[inline]
pub unsafe fn set(_key: Key, _value: *mut u8) { pub unsafe fn set(key: Key, value: *mut u8) {
panic!("should not be used on this target"); unsafe { TLS_SLOTS[key - 1] = value }
} }
#[inline] #[inline]
pub unsafe fn get(_key: Key) -> *mut u8 { pub unsafe fn get(key: Key) -> *mut u8 {
panic!("should not be used on this target"); unsafe { TLS_SLOTS[key - 1]}
} }
#[inline] #[inline]
pub unsafe fn destroy(_key: Key) { pub unsafe fn destroy(_key: Key) {
panic!("should not be used on this target"); // Ignore destructors for now
} }