From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 11:22:09 +0200 Subject: Adding upstream version 110.0.1. Signed-off-by: Daniel Baumann --- third_party/rust/bindgen/time.rs | 52 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 third_party/rust/bindgen/time.rs (limited to 'third_party/rust/bindgen/time.rs') diff --git a/third_party/rust/bindgen/time.rs b/third_party/rust/bindgen/time.rs new file mode 100644 index 0000000000..c13a640c46 --- /dev/null +++ b/third_party/rust/bindgen/time.rs @@ -0,0 +1,52 @@ +use std::io::{self, Write}; +use std::time::{Duration, Instant}; + +/// RAII timer to measure how long phases take. +#[derive(Debug)] +pub struct Timer<'a> { + output: bool, + name: &'a str, + start: Instant, +} + +impl<'a> Timer<'a> { + /// Creates a Timer with the given name, and starts it. By default, + /// will print to stderr when it is `drop`'d + pub fn new(name: &'a str) -> Self { + Timer { + output: true, + name, + start: Instant::now(), + } + } + + /// Sets whether or not the Timer will print a message + /// when it is dropped. + pub fn with_output(mut self, output: bool) -> Self { + self.output = output; + self + } + + /// Returns the time elapsed since the timer's creation + pub fn elapsed(&self) -> Duration { + Instant::now() - self.start + } + + fn print_elapsed(&mut self) { + if self.output { + let elapsed = self.elapsed(); + let time = (elapsed.as_secs() as f64) * 1e3 + + (elapsed.subsec_nanos() as f64) / 1e6; + let stderr = io::stderr(); + // Arbitrary output format, subject to change. + writeln!(stderr.lock(), " time: {:>9.3} ms.\t{}", time, self.name) + .expect("timer write should not fail"); + } + } +} + +impl<'a> Drop for Timer<'a> { + fn drop(&mut self) { + self.print_elapsed(); + } +} -- cgit v1.2.3