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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 https://mozilla.org/MPL/2.0/. */
#[cfg(feature = "energy-profiling")]
pub fn read_energy_uj() -> u64 {
energymon::read_energy_uj()
}
#[cfg(not(feature = "energy-profiling"))]
pub fn read_energy_uj() -> u64 {
0
}
#[cfg(feature = "energy-profiling")]
pub fn energy_interval_ms() -> u32 {
energymon::get_min_interval_ms()
}
#[cfg(not(feature = "energy-profiling"))]
pub fn energy_interval_ms() -> u32 {
1000
}
#[cfg(feature = "energy-profiling")]
mod energymon {
extern crate energy_monitor;
extern crate energymon;
use self::energy_monitor::EnergyMonitor;
use self::energymon::EnergyMon;
use std::mem;
use std::sync::{Once, ONCE_INIT};
static mut EM: Option<*mut EnergyMon> = None;
fn init() {
// can't use lazy_static macro for EM (no Sync trait for EnergyMon)
static ONCE: Once = ONCE_INIT;
ONCE.call_once(|| {
if let Ok(em) = EnergyMon::new() {
println!("Started energy monitoring from: {}", em.source());
unsafe {
EM = Some(mem::transmute(Box::new(em)));
}
}
});
}
/// Read energy from the energy monitor, otherwise return 0.
pub fn read_energy_uj() -> u64 {
init();
unsafe {
// EnergyMon implementations of EnergyMonitor always return a value
EM.map_or(0, |em| (*em).read_uj().unwrap())
}
}
pub fn get_min_interval_ms() -> u32 {
init();
unsafe { EM.map_or(0, |em| ((*em).interval_us() as f64 / 1000.0).ceil() as u32) }
}
}
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