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