1 files changed, 79 insertions, 0 deletions
diff --git a/include/grpcpp/impl/codegen/callback_common.h b/include/grpcpp/impl/codegen/callback_common.h
new file mode 100644
index 0000000000..5e1530a310
--- /dev/null
+++ b/include/grpcpp/impl/codegen/callback_common.h
@@ -0,0 +1,79 @@
+/*
+ *
+ * Copyright 2018 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 GRPCPP_IMPL_CODEGEN_CALLBACK_COMMON_H
+#define GRPCPP_IMPL_CODEGEN_CALLBACK_COMMON_H
+
+#include <functional>
+
+#include <grpcpp/impl/codegen/call.h>
+#include <grpcpp/impl/codegen/channel_interface.h>
+#include <grpcpp/impl/codegen/config.h>
+#include <grpcpp/impl/codegen/core_codegen_interface.h>
+#include <grpcpp/impl/codegen/status.h>
+
+// Forward declarations
+namespace grpc_core {
+class CQCallbackInterface;
+};
+
+namespace grpc {
+namespace internal {
+
+class CallbackWithStatusTag {
+ public:
+  // TODO(vjpai): make impl and ops part of this structure to avoid allocation,
+  // ownership transfer, and delete
+  CallbackWithStatusTag(std::function<void(Status)> f, bool self_delete,
+                        CompletionQueueTag* ops);
+  ~CallbackWithStatusTag() { delete ops_; }
+  void* tag() { return static_cast<void*>(impl_); }
+  Status* status_ptr() { return status_; }
+  CompletionQueueTag* ops() { return ops_; }
+
+  // force_run can only be performed on a tag before it can ever be active
+  void force_run(Status s);
+
+ private:
+  grpc_core::CQCallbackInterface* impl_;
+  Status* status_;
+  CompletionQueueTag* ops_;
+};
+
+class CallbackWithSuccessTag {
+ public:
+  // TODO(vjpai): make impl and ops part of this structure to avoid allocation,
+  // ownership transfer, and delete
+  CallbackWithSuccessTag(std::function<void(bool)> f, bool self_delete,
+                         CompletionQueueTag* ops);
+  ~CallbackWithSuccessTag() { delete ops_; }
+  void* tag() { return static_cast<void*>(impl_); }
+  CompletionQueueTag* ops() { return ops_; }
+
+  // force_run can only be performed on a tag before it can ever be active
+  void force_run(bool ok);
+
+ private:
+  grpc_core::CQCallbackInterface* impl_;
+  CompletionQueueTag* ops_;
+};
+
+}  // namespace internal
+}  // namespace grpc
+
+#endif  // GRPCPP_IMPL_CODEGEN_CLIENT_CALLBACK_H