resolve_address_posix.h

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//
// Copyright 2015 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_IOMGR_RESOLVE_ADDRESS_POSIX_H
#define GRPC_CORE_LIB_IOMGR_RESOLVE_ADDRESS_POSIX_H
 
#include <grpc/support/port_platform.h>
 
#include <functional>
 
#include "src/core/lib/iomgr/port.h"
#include "src/core/lib/iomgr/resolve_address.h"
 
namespace grpc_core {
 
// A DNS resolver which uses the native platform's getaddrinfo API.
class NativeDNSResolver : public DNSResolver {
 public:
  // Gets the singleton instance, creating it first if it doesn't exist
  static NativeDNSResolver* GetOrCreate();
 
  TaskHandle ResolveName(
      absl::string_view name, absl::string_view default_port,
      grpc_pollset_set* /* interested_parties */,
      std::function<void(absl::StatusOr<std::vector<grpc_resolved_address>>)>
          on_done) override;
 
  absl::StatusOr<std::vector<grpc_resolved_address>> ResolveNameBlocking(
      absl::string_view name, absl::string_view default_port) override;
 
  // NativeDNSResolver does not support cancellation.
  bool Cancel(TaskHandle handle) override;
};
 
}  // namespace grpc_core
 
#endif  // GRPC_CORE_LIB_IOMGR_RESOLVE_ADDRESS_POSIX_H