Internal change

PiperOrigin-RevId: 361877303

cpp/platform/public/thread_check_callable.h

@@ -0,0 +1,46 @@
+// Copyright 2020 Google LLC
+//
+// 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.
+
+#ifndef PLATFORM_PUBLIC_THREAD_CHECK_CALLABLE_H_
+#define PLATFORM_PUBLIC_THREAD_CHECK_CALLABLE_H_
+
+#include "platform/base/callable.h"
+#include "platform/public/lockable.h"
+#include "absl/base/thread_annotations.h"
+
+namespace location {
+namespace nearby {
+
+// A callable that acquires a lockable resource while running.
+// This class helps with thread safety analysis.
+template <typename T>
+class ThreadCheckCallable {
+ public:
+  ThreadCheckCallable(const Lockable *lockable, Callable<T> &&callable)
+      : lockable_{lockable}, callable_{callable} {}
+
+  ExceptionOr<T> operator()() const {
+    ThreadLockHolder thread_lock(lockable_);
+    return callable_();
+  }
+
+ private:
+  Lockable const *lockable_;
+  Callable<T> callable_;
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_PUBLIC_THREAD_CHECK_CALLABLE_H_