Merge pull request #22813 from mehrdada/fix-static-initialization-crap

Fix channelz plugin initializer

src/cpp/ext/proto_server_reflection_plugin.cc

@@ -64,10 +64,11 @@ static std::unique_ptr< ::grpc::ServerBuilderPlugin> CreateProtoReflection() {
 }
 
 void InitProtoReflectionServerBuilderPlugin() {
-  static bool already_here = false;
+  static struct Initialize {
-  if (already_here) return;
+    Initialize() {
-  already_here = true;
       ::grpc::ServerBuilder::InternalAddPluginFactory(&CreateProtoReflection);
+    }
+  } initializer;
 }
 
 // Force InitProtoReflectionServerBuilderPlugin() to be called at static

src/cpp/server/channelz/channelz_service_plugin.cc

@@ -75,11 +75,12 @@ namespace channelz {
 namespace experimental {
 
 void InitChannelzService() {
-  static bool already_here = false;
+  static struct Initializer {
-  if (already_here) return;
+    Initializer() {
-  already_here = true;
       ::grpc::ServerBuilder::InternalAddPluginFactory(
           &grpc::channelz::experimental::CreateChannelzServicePlugin);
+    }
+  } initialize;
 }
 
 }  // namespace experimental

test/cpp/end2end/server_builder_plugin_test.cc

@@ -121,17 +121,12 @@ std::unique_ptr<ServerBuilderPlugin> CreateTestServerBuilderPlugin() {
   return std::unique_ptr<ServerBuilderPlugin>(new TestServerBuilderPlugin());
 }
 
-void AddTestServerBuilderPlugin() {
-  static bool already_here = false;
-  if (already_here) return;
-  already_here = true;
-  ::grpc::ServerBuilder::InternalAddPluginFactory(
-      &CreateTestServerBuilderPlugin);
-}
-
 // Force AddServerBuilderPlugin() to be called at static initialization time.
 struct StaticTestPluginInitializer {
-  StaticTestPluginInitializer() { AddTestServerBuilderPlugin(); }
+  StaticTestPluginInitializer() {
+    ::grpc::ServerBuilder::InternalAddPluginFactory(
+        &CreateTestServerBuilderPlugin);
+  }
 } static_plugin_initializer_test_;
 
 // When the param boolean is true, the ServerBuilder plugin will be added at the