1 files changed, 70 insertions, 0 deletions
diff --git a/base/thread_checker.h b/base/thread_checker.h
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+++ b/base/thread_checker.h
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+// Copyright (C) 2013 The Libphonenumber 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
+//
+// http://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.
+
+// Author: Philippe Liard
+
+#ifndef I18N_PHONENUMBERS_BASE_THREAD_CHECKER_H_
+#define I18N_PHONENUMBERS_BASE_THREAD_CHECKER_H_
+
+#if !defined(I18N_PHONENUMBERS_USE_BOOST)
+
+// Note that I18N_PHONENUMBERS_NO_THREAD_SAFETY must be defined only to let the
+// user of the library know that it can't be used in a thread-safe manner when
+// it is not depending on Boost.
+#if !defined(__linux__) && !defined(__APPLE__) && \
+    !defined(I18N_PHONENUMBERS_NO_THREAD_SAFETY)
+#error Building without Boost, please provide \
+       -DI18N_PHONENUMBERS_NO_THREAD_SAFETY
+#endif
+
+#endif
+
+#if !defined(NDEBUG) && !defined(I18N_PHONENUMBERS_USE_BOOST) && \
+    (defined(__linux__) || defined(__apple__))
+
+#include <pthread.h>
+
+namespace i18n {
+namespace phonenumbers {
+
+class ThreadChecker {
+ public:
+  ThreadChecker() : thread_id_(pthread_self()) {}
+
+  bool CalledOnValidThread() const {
+    return thread_id_ == pthread_self();
+  }
+
+ private:
+  const pthread_t thread_id_;
+};
+
+#else
+
+namespace i18n {
+namespace phonenumbers {
+
+class ThreadChecker {
+ public:
+  bool CalledOnValidThread() const {
+    return true;
+  }
+};
+
+#endif
+
+}  // namespace phonenumbers
+}  // namespace i18n
+
+#endif  // I18N_PHONENUMBERS_BASE_THREAD_CHECKER_H_