forked from M-Labs/libfringe
49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
#![feature(unboxed_closures, default_type_params, asm)]
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extern crate test;
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extern crate libc;
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extern crate lwkt;
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extern crate fn_box;
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use test::Bencher;
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use lwkt::Context;
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use fn_box::FnBox;
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use std::ptr::null_mut;
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use std::mem::{transmute, forget};
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#[bench]
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fn swap(b: &mut Bencher) {
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let mut native = unsafe { Context::native() };
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let f: Box<FnBox() + Send + 'static> = unsafe { transmute((1u, 1u)) };
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let mut ctx = box { (&mut native as *mut Context, null_mut()) };
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let mut green = Context::new(init, &mut *ctx as *mut _, f);
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ctx.1 = &mut green as *mut Context;
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fn init(ctx: *mut (*mut Context, *mut Context), f: Box<FnBox()>) -> ! {
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unsafe {
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let (native, green) = *ctx;
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forget(f);
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loop { Context::swap(&mut *green, &mut *native); }
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}
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}
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unsafe {
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Context::swap(&mut native, &mut green);
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}
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b.iter(|| unsafe {
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Context::swap(&mut native, &mut green);
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})
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}
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#[bench]
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fn kernel_swap(b: &mut Bencher) {
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b.iter(|| unsafe {
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asm!("movq $$102, %rax\n\
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syscall"
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:
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:
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: "rax", "rcx"
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: "volatile");
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});
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}
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