#![cfg(target_thread_local)]
#![unstable(feature = "thread_local_internals", issue = "none")]
#[cfg(any(target_os = "linux", target_os = "fuchsia", target_os = "redox"))]
pub unsafe fn register_dtor(t: *mut u8, dtor: unsafe extern "C" fn(*mut u8)) {
use crate::mem;
use crate::sys_common::thread_local_dtor::register_dtor_fallback;
extern "C" {
#[linkage = "extern_weak"]
static __dso_handle: *mut u8;
#[linkage = "extern_weak"]
static __cxa_thread_atexit_impl: *const libc::c_void;
}
if !__cxa_thread_atexit_impl.is_null() {
type F = unsafe extern "C" fn(
dtor: unsafe extern "C" fn(*mut u8),
arg: *mut u8,
dso_handle: *mut u8,
) -> libc::c_int;
mem::transmute::<*const libc::c_void, F>(__cxa_thread_atexit_impl)(
dtor,
t,
&__dso_handle as *const _ as *mut _,
);
return;
}
register_dtor_fallback(t, dtor);
}
#[cfg(target_os = "macos")]
pub unsafe fn register_dtor(t: *mut u8, dtor: unsafe extern "C" fn(*mut u8)) {
use crate::cell::Cell;
use crate::mem;
use crate::ptr;
#[thread_local]
static REGISTERED: Cell<bool> = Cell::new(false);
#[thread_local]
static mut DTORS: Vec<(*mut u8, unsafe extern "C" fn(*mut u8))> = Vec::new();
if !REGISTERED.get() {
_tlv_atexit(run_dtors, ptr::null_mut());
REGISTERED.set(true);
}
extern "C" {
fn _tlv_atexit(dtor: unsafe extern "C" fn(*mut u8), arg: *mut u8);
}
let list = &mut DTORS;
list.push((t, dtor));
unsafe extern "C" fn run_dtors(_: *mut u8) {
let mut list = mem::take(&mut DTORS);
while !list.is_empty() {
for (ptr, dtor) in list {
dtor(ptr);
}
list = mem::take(&mut DTORS);
}
}
}
#[cfg(any(target_os = "vxworks", target_os = "horizon", target_os = "emscripten"))]
#[cfg_attr(target_family = "wasm", allow(unused))] pub unsafe fn register_dtor(t: *mut u8, dtor: unsafe extern "C" fn(*mut u8)) {
use crate::sys_common::thread_local_dtor::register_dtor_fallback;
register_dtor_fallback(t, dtor);
}