channel_init.h

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/*
 *
 * Copyright 2016 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_SURFACE_CHANNEL_INIT_H
#define GRPC_CORE_LIB_SURFACE_CHANNEL_INIT_H
 
#include <grpc/support/port_platform.h>
 
#include <functional>
#include <utility>
#include <vector>
 
#include "src/core/lib/channel/channel_stack_builder.h"
#include "src/core/lib/surface/channel_stack_type.h"
 
#define GRPC_CHANNEL_INIT_BUILTIN_PRIORITY 10000
 
 
namespace grpc_core {
 
class ChannelInit {
 public:
  using Stage = std::function<bool(ChannelStackBuilder* builder)>;
 
  class Builder {
   public:
    void RegisterStage(grpc_channel_stack_type type, int priority, Stage stage);
 
    ChannelInit Build();
 
   private:
    struct Slot {
      Slot(Stage stage, int priority)
          : stage(std::move(stage)), priority(priority) {}
      Stage stage;
      int priority;
    };
    std::vector<Slot> slots_[GRPC_NUM_CHANNEL_STACK_TYPES];
  };
 
  bool CreateStack(ChannelStackBuilder* builder) const;
 
 private:
  std::vector<Stage> slots_[GRPC_NUM_CHANNEL_STACK_TYPES];
};
 
}  // namespace grpc_core
 
#endif /* GRPC_CORE_LIB_SURFACE_CHANNEL_INIT_H */