forked from M-Labs/libfringe
31 lines
917 B
Rust
31 lines
917 B
Rust
// This file is part of libfringe, a low-level green threading library.
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// Copyright (c) edef <edef@edef.eu>,
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// whitequark <whitequark@whitequark.org>
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// See the LICENSE file included in this distribution.
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#![feature(test)]
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extern crate test;
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extern crate fringe;
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use fringe::Context;
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static mut ctx_slot: *mut Context<fringe::OsStack> = 0 as *mut Context<_>;
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#[bench]
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fn swap(b: &mut test::Bencher) {
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unsafe extern "C" fn loopback(mut arg: usize) -> ! {
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// This deliberately does not ignore arg, to measure the time it takes
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// to move the return value between registers.
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let ctx_ptr = ctx_slot;
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loop { arg = Context::swap(ctx_ptr, ctx_ptr, arg) }
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}
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unsafe {
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let stack = fringe::OsStack::new(4 << 20).unwrap();
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let mut ctx = Context::new(stack, loopback);
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ctx_slot = &mut ctx;
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let ctx_ptr = &mut ctx;
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b.iter(|| Context::swap(ctx_ptr, ctx_ptr, 0));
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}
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}
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