1 files changed, 44 insertions, 0 deletions
diff --git a/pw_sync/lock_testing.cc b/pw_sync/lock_testing.cc
new file mode 100644
index 000000000..e2b75954b
--- /dev/null
+++ b/pw_sync/lock_testing.cc
@@ -0,0 +1,44 @@
+// 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/lock_testing.h"
+
+#include "pw_assert/check.h"
+
+namespace pw::sync::test {
+
+void FakeBasicLockable::DoLockOperation(Operation operation) {
+  switch (operation) {
+    case Operation::kLock:
+      PW_CHECK(!locked_, "Recursive lock detected");
+      locked_ = true;
+      return;
+
+    case Operation::kUnlock:
+    default:
+      PW_CHECK(locked_, "Unlock while unlocked detected");
+      locked_ = false;
+      return;
+  }
+}
+
+bool FakeLockable::try_lock() {
+  if (locked()) {
+    return false;
+  }
+  locked_ = true;
+  return true;
+}
+
+}  // namespace pw::sync::test