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#[cfg(target_has_atomic = "ptr")]
pub use self::imp::set_oom_handler;
use core::intrinsics;
fn default_oom_handler() -> ! {
unsafe { intrinsics::abort() }
}
#[cold]
#[inline(never)]
#[unstable(feature = "oom", reason = "not a scrutinized interface",
issue = "27700")]
pub fn oom() -> ! {
self::imp::oom()
}
#[cfg(target_has_atomic = "ptr")]
mod imp {
use core::mem;
use core::sync::atomic::{AtomicPtr, Ordering};
static OOM_HANDLER: AtomicPtr<()> = AtomicPtr::new(super::default_oom_handler as *mut ());
#[inline(always)]
pub fn oom() -> ! {
let value = OOM_HANDLER.load(Ordering::SeqCst);
let handler: fn() -> ! = unsafe { mem::transmute(value) };
handler();
}
#[unstable(feature = "oom", reason = "not a scrutinized interface",
issue = "27700")]
pub fn set_oom_handler(handler: fn() -> !) {
OOM_HANDLER.store(handler as *mut (), Ordering::SeqCst);
}
}
#[cfg(not(target_has_atomic = "ptr"))]
mod imp {
#[inline(always)]
pub fn oom() -> ! {
super::default_oom_handler()
}
}