Struct std::sys::windows::thread_local_key::StaticKey

pub struct StaticKey {
    key: AtomicU32,
    dtor: Option<unsafe extern "C" fn(_: *mut u8)>,
    next: AtomicPtr<StaticKey>,
    once: UnsafeCell<RTL_RUN_ONCE>,
}

Fields

key: AtomicU32

The key value shifted up by one. Since TLS_OUT_OF_INDEXES == DWORD::MAX is not a valid key value, this allows us to use zero as sentinel value without risking overflow.

dtor: Option<unsafe extern "C" fn(_: *mut u8)>

next: AtomicPtr<StaticKey>

once: UnsafeCell<RTL_RUN_ONCE>

Currently, destructors cannot be unregistered, so we cannot use racy initialization for keys. Instead, we need synchronize initialization. Use the Windows-provided Once since it does not require TLS.

Implementations

impl StaticKey

pub const fn new(dtor: Option<unsafe extern "C" fn(_: *mut u8)>) -> StaticKey

pub unsafe fn set(&'static self, val: *mut u8)

pub unsafe fn get(&'static self) -> *mut u8

unsafe fn key(&'static self) -> c_ulong

unsafe fn init(&'static self) -> c_ulong

Trait Implementations

impl Send for StaticKey

impl Sync for StaticKey