Add ReferenceCounted base class.
diff --git a/src/core/lib/support/reference_counted.h b/src/core/lib/support/reference_counted.h
new file mode 100644
index 0000000..ebd620c
--- /dev/null
+++ b/src/core/lib/support/reference_counted.h
@@ -0,0 +1,55 @@
+/*
+ *
+ * Copyright 2017 gRPC 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.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_SUPPORT_REFERENCE_COUNTED_H
+#define GRPC_CORE_LIB_SUPPORT_REFERENCE_COUNTED_H
+
+#include <grpc/support/sync.h>
+
+#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/support/debug_location.h"
+
+namespace grpc_core {
+
+class ReferenceCounted {
+ public:
+ void Ref();
+ void Ref(const DebugLocation& location, const char* reason);
+
+ bool Unref();
+ bool Unref(const DebugLocation& location, const char* reason);
+
+ // Not copyable nor movable.
+ ReferenceCounted(const ReferenceCounted&) = delete;
+ ReferenceCounted& operator=(const ReferenceCounted&) = delete;
+
+ protected:
+ explicit ReferenceCounted(TraceFlag* trace_flag) : trace_flag_(trace_flag) {
+ gpr_ref_init(&refs_, 1);
+ }
+
+ virtual ~ReferenceCounted() {}
+
+ private:
+ TraceFlag* trace_flag_;
+ gpr_refcount refs_;
+};
+
+} // namespace grpc_core
+
+#endif // GRPC_CORE_LIB_SUPPORT_REFERENCE_COUNTED_H