mirror of
https://github.com/servo/servo.git
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092507d23c
A rebuild after touching components/profile/mem.rs now takes 48 seconds (and only rebuilds `profile` and `servo`) which is much lower than it used to be. In comparison, a rebuild after touching components/profile_traits/mem.rs takes 294 seconds and rebuilds many more crates. This change also removes some unnecessary crate dependencies in `net` and `net_traits`.
72 lines
2.4 KiB
Rust
72 lines
2.4 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use std::sync::mpsc::Sender;
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#[derive(Clone)]
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pub struct ProfilerChan(pub Sender<ProfilerMsg>);
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impl ProfilerChan {
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pub fn send(&self, msg: ProfilerMsg) {
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let ProfilerChan(ref c) = *self;
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c.send(msg).unwrap();
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}
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}
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/// A single memory-related measurement.
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pub struct Report {
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/// The identifying path for this report.
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pub path: Vec<String>,
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/// The size, in bytes.
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pub size: usize,
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}
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/// A channel through which memory reports can be sent.
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#[derive(Clone)]
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pub struct ReportsChan(pub Sender<Vec<Report>>);
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impl ReportsChan {
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pub fn send(&self, report: Vec<Report>) {
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let ReportsChan(ref c) = *self;
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c.send(report).unwrap();
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}
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}
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/// A memory reporter is capable of measuring some data structure of interest. Because it needs to
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/// be passed to and registered with the Profiler, it's typically a "small" (i.e. easily cloneable)
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/// value that provides access to a "large" data structure, e.g. a channel that can inject a
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/// request for measurements into the event queue associated with the "large" data structure.
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pub trait Reporter {
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/// Collect one or more memory reports. Returns true on success, and false on failure.
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fn collect_reports(&self, reports_chan: ReportsChan) -> bool;
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}
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/// An easy way to build a path for a report.
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#[macro_export]
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macro_rules! path {
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($($x:expr),*) => {{
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use std::borrow::ToOwned;
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vec![$( $x.to_owned() ),*]
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}}
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}
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/// Messages that can be sent to the memory profiler thread.
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pub enum ProfilerMsg {
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/// Register a Reporter with the memory profiler. The String is only used to identify the
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/// reporter so it can be unregistered later. The String must be distinct from that used by any
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/// other registered reporter otherwise a panic will occur.
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RegisterReporter(String, Box<Reporter + Send>),
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/// Unregister a Reporter with the memory profiler. The String must match the name given when
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/// the reporter was registered. If the String does not match the name of a registered reporter
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/// a panic will occur.
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UnregisterReporter(String),
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/// Triggers printing of the memory profiling metrics.
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Print,
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/// Tells the memory profiler to shut down.
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Exit,
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}
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