forked from M-Labs/libfringe
cbe136b762
The new design concerns itself with one thing and exactly one thing: passing values back and forth with an extern "C" function. This allows to simplify fringe::arch into a single primitive, swap. Close #21
42 lines
1.0 KiB
Rust
42 lines
1.0 KiB
Rust
// 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<fringe::OsStack> = 0 as *mut Context<_>;
|
|
|
|
const FE_DIVBYZERO: i32 = 0x4;
|
|
extern {
|
|
fn feenableexcept(except: i32) -> i32;
|
|
}
|
|
|
|
#[test]
|
|
#[ignore]
|
|
fn fpe() {
|
|
unsafe extern "C" fn universe_destroyer(_arg: usize) -> ! {
|
|
loop {
|
|
println!("{:?}", 1.0/black_box(0.0));
|
|
Context::swap(ctx_slot, ctx_slot, 0);
|
|
}
|
|
}
|
|
|
|
unsafe {
|
|
let stack = fringe::OsStack::new(4 << 20).unwrap();
|
|
let mut ctx = Context::new(stack, universe_destroyer);
|
|
ctx_slot = &mut ctx;
|
|
|
|
Context::swap(ctx_slot, ctx_slot, 0);
|
|
feenableexcept(FE_DIVBYZERO);
|
|
Context::swap(ctx_slot, ctx_slot, 0);
|
|
}
|
|
}
|