Replace atomic-polyfill with portable-atomic (#234)

Cargo.toml

@@ -42,7 +42,7 @@ compile-time-rng = ["const-random"]
 no-rng = []
 
 # in case this is being used on an architecture lacking core::sync::atomic::AtomicUsize and friends
-atomic-polyfill = [ "dep:atomic-polyfill", "once_cell/atomic-polyfill"]
+atomic-polyfill = [ "dep:portable-atomic", "once_cell/critical-section"]
 
 # Nightly-only support for AES intrinsics on 32-bit ARM
 nightly-arm-aes = []
@@ -82,7 +82,7 @@ version_check = "0.9.4"
 const-random = { version = "0.1.17", optional = true }
 serde = { version = "1.0.117", optional = true }
 cfg-if = "1.0"
-atomic-polyfill = { version="1.0.1", optional=true}
+portable-atomic = { version = "1.0.0", optional = true }
 getrandom = { version = "0.2.7", optional = true }
 zerocopy = { version = "0.7.31", default-features = false, features = ["simd"] }
 

src/random_state.rs

@@ -24,7 +24,7 @@ cfg_if::cfg_if! {
 }
 
 #[cfg(feature = "atomic-polyfill")]
-use atomic_polyfill as atomic;
+use portable_atomic as atomic;
 #[cfg(not(feature = "atomic-polyfill"))]
 use core::sync::atomic;