support for 32bit environenments like xtensa, mips ..

Cargo.toml

@@ -32,6 +32,9 @@ memchr = "^2.3"
 reqwest = { version = "^0.12", features = ["blocking"], optional = true }
 thiserror = "^1.0"
 
+[target.'cfg(any(target_arch = "powerpc", target_arch = "mips", target_arch = "xtensa"))'.dependencies]
+portable-atomic = "1.10.0"
+
 [target.'cfg(target_os = "linux")'.dependencies]
 procfs = { version = "^0.16", optional = true, default-features = false }
 

src/atomic64.rs

@@ -4,8 +4,13 @@
 use std::cmp::*;
 use std::f64;
 use std::ops::*;
+#[cfg(not(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa")))]
 use std::sync::atomic::{AtomicI64 as StdAtomicI64, AtomicU64 as StdAtomicU64, Ordering};
 
+#[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa"))]
+use portable_atomic::{AtomicI64 as StdAtomicI64, AtomicU64 as StdAtomicU64, Ordering};
+
+
 /// An interface for numbers. Used to generically model float metrics and integer metrics, i.e.
 /// [`Counter`](crate::Counter) and [`IntCounter`](crate::Counter).
 pub trait Number:

src/histogram.rs

@@ -5,10 +5,15 @@ use std::cell::RefCell;
 use std::collections::HashMap;
 use std::convert::From;
 use std::sync::{
-    atomic::{AtomicU64 as StdAtomicU64, Ordering},
     Arc, Mutex,
 };
+
+#[cfg(not(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa")))]
+use std::sync::atomic::{AtomicU64 as StdAtomicU64, Ordering};
+
 use std::time::{Duration, Instant as StdInstant};
+#[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa"))]
+use portable_atomic::{AtomicU64 as StdAtomicU64, Ordering};
 
 use crate::atomic64::{Atomic, AtomicF64, AtomicU64};
 use crate::desc::{Desc, Describer};

src/timer.rs

@@ -1,4 +1,8 @@
-use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
+#[cfg(not(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa")))]
+use std::sync::atomic::{AtomicBool,AtomicU64, Ordering};
+#[cfg(any(target_arch = "mips", target_arch = "powerpc", target_arch = "xtensa"))]
+use portable_atomic::{AtomicBool,AtomicU64, Ordering};
+
 use std::thread;
 use std::time::{Duration, Instant};