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use std::sync::atomic::{AtomicUsize, Ordering};
static COUNT: AtomicUsize = AtomicUsize::new(0);
unsafe extern "C" fn ctor<const N: usize>() {
COUNT.fetch_add(N, Ordering::Relaxed);
}
#[rustfmt::skip]
macro_rules! ctor {
($ident:ident: $ty:ty = $ctor:expr) => {
#[cfg_attr(
all(any(
target_os = "linux",
target_os = "android",
target_os = "dragonfly",
target_os = "freebsd",
target_os = "haiku",
target_os = "illumos",
target_os = "netbsd",
target_os = "openbsd",
target_os = "solaris",
target_os = "none",
target_family = "wasm",
)),
link_section = ".init_array"
)]
#[cfg_attr(windows, link_section = ".CRT$XCU")]
#[cfg_attr(
any(target_os = "macos", target_os = "ios"),
// We do not set the `mod_init_funcs` flag here since ctor/inventory also do not do
// that. See <https://github.com/rust-lang/miri/pull/4459#discussion_r2200115629>.
link_section = "__DATA,__mod_init_func"
)]
#[used]
static $ident: $ty = $ctor;
};
}
ctor! { CTOR1: unsafe extern "C" fn() = ctor::<1> }
ctor! { CTOR2: [unsafe extern "C" fn(); 2] = [ctor::<2>, ctor::<3>] }
fn main() {
assert_eq!(COUNT.load(Ordering::Relaxed), 6, "ctors did not run");
}
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