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libfringe/tests/fpe.rs

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// This file is part of libfringe, a low-level green threading library.
// Copyright (c) 2015, Ben Segall <talchas@gmail.com>
// Copyright (c) 2015, edef <edef@edef.eu>
// See the LICENSE file included in this distribution.
#![cfg(target_os = "linux")]
#![feature(test)]
#![feature(thread_local)]
#![feature(asm)]
extern crate fringe;
extern crate test;
use fringe::Context;
use test::black_box;
#[thread_local]
static mut ctx_slot: *mut Context<'static, fringe::OsStack> = 0 as *mut Context<_>;
const FE_DIVBYZERO: i32 = 0x4;
extern {
fn feenableexcept(except: i32) -> i32;
}
#[test]
#[ignore]
fn fpe() {
unsafe {
let stack = fringe::OsStack::new(4 << 20).unwrap();
let mut ctx = Context::new(stack, move || {
println!("it's alive!");
loop {
println!("{:?}", 1.0/black_box(0.0));
Context::swap(ctx_slot, ctx_slot);
}
});
ctx_slot = &mut ctx;
Context::swap(ctx_slot, ctx_slot);
feenableexcept(FE_DIVBYZERO);
Context::swap(ctx_slot, ctx_slot);
}
}