1 files changed, 35 insertions, 0 deletions
diff --git a/pw_sync_zephyr/interrupt_spin_lock.cc b/pw_sync_zephyr/interrupt_spin_lock.cc
new file mode 100644
index 000000000..0d4674433
--- /dev/null
+++ b/pw_sync_zephyr/interrupt_spin_lock.cc
@@ -0,0 +1,35 @@
+// Copyright 2023 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "pw_sync/interrupt_spin_lock.h"
+
+#include <zephyr/spinlock.h>
+
+#include "pw_assert/check.h"
+
+namespace pw::sync {
+
+void InterruptSpinLock::lock() {
+  PW_DCHECK(!native_type_.locked,
+            "Recursive InterruptSpinLock::lock() detected");
+  native_type_.key = k_spin_lock(&native_type_.lock);
+  native_type_.locked = true;
+}
+
+void InterruptSpinLock::unlock() {
+  native_type_.locked = false;
+  k_spin_unlock(&native_type_.lock, native_type_.key);
+}
+
+}  // namespace pw::sync