libfringe/benches/context_new.rs

39 lines
761 B
Rust
Raw Normal View History

2015-04-16 03:54:07 +08:00
#![feature(test)]
extern crate test;
extern crate lwkt;
use lwkt::{Context, Stack};
2015-04-16 03:54:07 +08:00
static mut ctx_slot: *mut Context<SliceStack<'static>> = 0 as *mut Context<_>;
static mut stack_buf: [u8; 1024] = [0; 1024];
2015-04-16 03:54:07 +08:00
#[bench]
fn context_new(b: &mut test::Bencher) {
b.iter(|| unsafe {
let stack = SliceStack(&mut stack_buf);
let mut ctx = Context::new(stack, move || {
2015-04-16 03:54:07 +08:00
let ctx_ptr = ctx_slot;
loop {
(*ctx_ptr).swap()
}
});
ctx_slot = &mut ctx;
ctx.swap();
})
}
struct SliceStack<'a>(&'a mut [u8]);
impl<'a> lwkt::Stack for SliceStack<'a> {
fn top(&mut self) -> *mut u8 {
unsafe {
self.0.as_mut_ptr().offset(self.0.len() as isize)
}
}
fn limit(&self) -> *const u8 {
self.0.as_ptr()
}
}