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include/grpc2/support/channel_interface.h

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+// Copyright 2024 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 GRPC2_SUPPORT_CHANNEL_INTERFACE_H
+#define GRPC2_SUPPORT_CHANNEL_INTERFACE_H
+
+#include "src/core/lib/transport/message.h"
+#include "src/core/lib/transport/metadata.h"
+#include "src/core/util/dual_ref_counted.h"
+
+namespace grpc2 {
+
+class ClientCallInterface
+    : public grpc_core::DualRefCounted<ClientCallInterface,
+                                       grpc_core::PolymorphicRefCount,
+                                       grpc_core::UnrefCallDestroy> {
+ public:
+  virtual void PerformUnary(
+      absl::AnyInvocable<
+          void(absl::optional<grpc_core::ServerMetadataHandle>,
+               absl::optional<grpc_core::MessageHandle>,
+               absl::optional<grpc_core::ServerMetadataHandle>)>) = 0;
+};
+
+class ChannelInterface {
+ public:
+  virtual grpc_core::RefCountedPtr<ClientCallInterface> NewCall(
+      grpc_core::ClientMetadataHandle metadata) = 0;
+};
+
+}  // namespace grpc2
+
+#endif  // GRPC2_SUPPORT_CHANNEL_INTERFACE_H