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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! A module for writing time profiler traces out to a self contained HTML file.
use profile_traits::time::{ProfilerCategory, TimerMetadata};
use serde_json;
use std::fs;
use std::io::Write;
/// An RAII class for writing the HTML trace dump.
pub struct TraceDump {
file: fs::File,
}
#[derive(Debug, Serialize)]
struct TraceEntry {
category: ProfilerCategory,
metadata: Option<TimerMetadata>,
#[serde(rename = "startTime")]
start_time: u64,
#[serde(rename = "endTime")]
end_time: u64,
#[serde(rename = "startEnergy")]
start_energy: u64,
#[serde(rename = "endEnergy")]
end_energy: u64,
}
impl TraceDump {
/// Create a new TraceDump and write the prologue of the HTML file out to
/// disk.
pub fn new(mut file: fs::File) -> TraceDump {
write_prologue(&mut file);
TraceDump { file: file }
}
/// Write one trace to the trace dump file.
pub fn write_one(&mut self,
category: &(ProfilerCategory, Option<TimerMetadata>),
time: (u64, u64),
energy: (u64, u64)) {
let entry = TraceEntry {
category: category.0,
metadata: category.1.clone(),
start_time: time.0,
end_time: time.1,
start_energy: energy.0,
end_energy: energy.1,
};
serde_json::to_writer(&mut self.file, &entry).unwrap();
writeln!(&mut self.file, ",").unwrap();
}
}
impl Drop for TraceDump {
/// Write the epilogue of the trace dump HTML file out to disk on
/// destruction.
fn drop(&mut self) {
write_epilogue(&mut self.file);
}
}
fn write_prologue(file: &mut fs::File) {
writeln!(file, "{}", include_str!("./trace-dump-prologue-1.html")).unwrap();
writeln!(file, "{}", include_str!("./trace-dump.css")).unwrap();
writeln!(file, "{}", include_str!("./trace-dump-prologue-2.html")).unwrap();
}
fn write_epilogue(file: &mut fs::File) {
writeln!(file, "{}", include_str!("./trace-dump-epilogue-1.html")).unwrap();
writeln!(file, "{}", include_str!("./trace-dump.js")).unwrap();
writeln!(file, "{}", include_str!("./trace-dump-epilogue-2.html")).unwrap();
}
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