text: // Copyright 2021 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_SECURITY_AUTHORIZATION_AUTHORIZATION_POLICY_PROVIDER_H
  #define GRPC_CORE_LIB_SECURITY_AUTHORIZATION_AUTHORIZATION_POLICY_PROVIDER_H
  
  #include <grpc/support/port_platform.h>
  
  #include "src/core/lib/gprpp/dual_ref_counted.h"
  #include "src/core/lib/security/authorization/authorization_engine.h"
  
  struct grpc_authorization_policy_provider
      : public grpc_core::DualRefCounted<grpc_authorization_policy_provider> {
   public:
    static absl::string_view ChannelArgName() {
      return GRPC_ARG_AUTHORIZATION_POLICY_PROVIDER;
    }
    static int ChannelArgsCompare(const grpc_authorization_policy_provider* a,
                                  const grpc_authorization_policy_provider* b) {
      return QsortCompare(a, b);
    }
    struct AuthorizationEngines {
      grpc_core::RefCountedPtr<grpc_core::AuthorizationEngine> allow_engine;
      grpc_core::RefCountedPtr<grpc_core::AuthorizationEngine> deny_engine;
    };
    virtual AuthorizationEngines engines() = 0;
  };
  
  #endif  // GRPC_CORE_LIB_SECURITY_AUTHORIZATION_AUTHORIZATION_POLICY_PROVIDER_H
  