Made compatible with thumbv6m-none-eabi

Author: BjornTheProgrammer

.github/workflows/ci.yaml

@@ -42,6 +42,27 @@ jobs:
           components: rustfmt
       - run: cargo fmt --all --check
 
+  nostd-build:
+    runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
+    strategy:
+      matrix:
+        include:
+          - rust: stable
+            experimental: false
+            target: thumbv6m-none-eabi
+
+    name: nostd-build/${{ matrix.target }}/${{ matrix.rust }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: ${{ matrix.rust }}
+          targets: ${{ matrix.target }}
+      - name: Tests
+        run: |
+          cargo rustc "--target=${{ matrix.target }}" --no-default-features --features portable-atomic-critical-section
+
   tests:
     runs-on: ubuntu-latest
     strategy:

Cargo.toml

@@ -44,6 +44,7 @@ matrixmultiply = { version = "0.3.2", default-features = false, features=["cgemm
 serde = { version = "1.0", optional = true, default-features = false, features = ["alloc"] }
 rawpointer = { version = "0.2" }
 
+
 [dev-dependencies]
 defmac = "0.2"
 quickcheck = { version = "1.0", default-features = false }
@@ -70,8 +71,14 @@ docs = ["approx", "serde", "rayon"]
 std = ["num-traits/std", "matrixmultiply/std"]
 rayon = ["dep:rayon", "std"]
 
+portable-atomic-critical-section = ["portable-atomic/critical-section"]
+
 matrixmultiply-threading = ["matrixmultiply/threading"]
 
+[target.'cfg(not(target_has_atomic = "ptr"))'.dependencies]
+portable-atomic = { version = "1.6.0" }
+portable-atomic-util = { version = "0.2.0", features = [ "alloc" ] }
+
 [profile.bench]
 debug = true
 [profile.dev.package.numeric-tests]

README.rst

@@ -97,6 +97,10 @@ your `Cargo.toml`.
 
   - Enable the ``threading`` feature in the matrixmultiply package
 
+- ``portable-atomic-critical-section``
+
+  - Whether ``portable-atomic`` should use ``critical-section``
+
 How to use with cargo
 ---------------------
 

src/data_traits.rs

@@ -11,7 +11,12 @@
 #[allow(unused_imports)]
 use rawpointer::PointerExt;
 
+#[cfg(target_has_atomic = "ptr")]
 use alloc::sync::Arc;
+
+#[cfg(not(target_has_atomic = "ptr"))]
+use portable_atomic_util::Arc;
+
 #[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 use std::mem::MaybeUninit;

src/impl_arc_array.rs

@@ -7,8 +7,13 @@
 // except according to those terms.
 
 use crate::imp_prelude::*;
+
+#[cfg(target_has_atomic = "ptr")]
 use alloc::sync::Arc;
 
+#[cfg(not(target_has_atomic = "ptr"))]
+use portable_atomic_util::Arc;
+
 /// Methods specific to `ArcArray`.
 ///
 /// ***See also all methods for [`ArrayBase`]***

src/lib.rs

@@ -123,7 +123,12 @@ extern crate cblas_sys;
 #[cfg(feature = "docs")]
 pub mod doc;
 
+#[cfg(target_has_atomic = "ptr")]
 use alloc::sync::Arc;
+
+#[cfg(not(target_has_atomic = "ptr"))]
+use portable_atomic_util::Arc;
+
 use std::marker::PhantomData;
 
 pub use crate::dimension::dim::*;