jemalloc_info/
lib.rs

1// False positive for NifMap lifetimes
2// see https://github.com/rust-lang/rust-clippy/issues/4291
3#![allow(clippy::extra_unused_lifetimes)]
4
5use rustler::{Error, NifResult};
6
7#[derive(rustler::NifMap)]
8pub struct JemallocStats {
9    active: u64,
10    allocated: u64,
11    epoch: u64,
12    mapped: u64,
13    metadata: u64,
14    resident: u64,
15    retained: u64,
16}
17
18macro_rules! jemalloc_value {
19    ($name: ident) => {
20        jemalloc_ctl::$name::mib()
21            .and_then(|x| x.read())
22            .map(|x| x as u64)
23            .map_err(|x| Error::Term(Box::new(x.to_string())))
24    };
25}
26
27macro_rules! jemalloc_stat_value {
28    ($name: ident) => {
29        jemalloc_ctl::stats::$name::mib()
30            .and_then(|x| x.read())
31            .map(|x| x as u64)
32            .map_err(|x| Error::Term(Box::new(x.to_string())))
33    };
34}
35
36#[rustler::nif]
37pub fn jemalloc_allocation_info() -> NifResult<JemallocStats> {
38    jemalloc_ctl::epoch::mib().and_then(|x| x.advance()).ok();
39
40    Ok(JemallocStats {
41        active: jemalloc_stat_value!(active)?,
42        allocated: jemalloc_stat_value!(allocated)?,
43        epoch: jemalloc_value!(epoch)?,
44        mapped: jemalloc_stat_value!(mapped)?,
45        metadata: jemalloc_stat_value!(metadata)?,
46        resident: jemalloc_stat_value!(resident)?,
47        retained: jemalloc_stat_value!(retained)?,
48    })
49}
jemalloc_info/lib.rs

jemalloc_info/
lib.rs
