re-add atomic dep to support thumbv6m

Cargo.toml

@@ -51,11 +51,11 @@ repository = "uuid-rs/uuid"
 default = ["std"]
 std = []
 macro-diagnostics = ["private_uuid-macro-internal"]
-v1 = []
+v1 = ["private_atomic"]
 v3 = ["md5"]
 v4 = ["rng"]
 v5 = ["sha1"]
-v6 = []
+v6 = ["private_atomic"]
 v7 = ["rng"]
 v8 = []
 js = ["private_getrandom", "private_getrandom/js"]
@@ -134,6 +134,12 @@ version = "1.1.2"
 path = "macros"
 optional = true
 
+[dependencies.private_atomic]
+package = "atomic"
+default-features = false
+optional = true
+version = "0.5"
+
 [dev-dependencies.bincode]
 version = "1.0"
 

src/timestamp.rs

@@ -112,14 +112,14 @@ impl<'a, T: ClockSequence + ?Sized> ClockSequence for &'a T {
 }
 
 /// For features v1 and v1, constructs a `Context` struct which implements the `ClockSequence` trait
-#[cfg(any(feature = "v1", feature = "v6", feature = "v7"))]
+#[cfg(any(feature = "v1", feature = "v6"))]
 pub mod context {
-    use std::sync::atomic::{AtomicU16, Ordering};
+    use private_atomic::{Atomic, Ordering};
     /// A thread-safe, stateful context for the v1 generator to help ensure
     /// process-wide uniqueness.
     #[derive(Debug)]
     pub struct Context {
-        count: AtomicU16,
+        count: Atomic<u16>,
     }
 
     impl Context {
@@ -133,7 +133,7 @@ pub mod context {
         /// process.
         pub const fn new(count: u16) -> Self {
             Self {
-                count: AtomicU16::new(count),
+                count: Atomic::<u16>::new(count),
             }
         }
 
@@ -151,7 +151,7 @@ pub mod context {
         #[cfg(feature = "rng")]
         pub fn new_random() -> Self {
             Self {
-                count: AtomicU16::new(crate::rng::u16()),
+                count: Atomic::<u16>::new(crate::rng::u16()),
             }
         }
     }