/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * 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 _THRIFT_TRANSPORT_TFDTRANSPORT_H_
#define _THRIFT_TRANSPORT_TFDTRANSPORT_H_ 1

#include <string>

#include <folly/portability/SysTime.h>

#include <thrift/lib/cpp/transport/TTransport.h>
#include <thrift/lib/cpp/transport/TVirtualTransport.h>

namespace apache {
namespace thrift {
namespace transport {

/**
 * Dead-simple wrapper around a file descriptor.
 *
 */
class TFDTransport : public TVirtualTransport<TFDTransport> {
 public:
  enum ClosePolicy {
    NO_CLOSE_ON_DESTROY = 0,
    CLOSE_ON_DESTROY = 1,
  };

  explicit TFDTransport(int fd, ClosePolicy close_policy = NO_CLOSE_ON_DESTROY)
      : fd_(fd), close_policy_(close_policy) {}

  ~TFDTransport() override {
    if (close_policy_ == CLOSE_ON_DESTROY) {
      close();
    }
  }

  bool isOpen() override { return fd_ >= 0; }

  void open() override {}

  void close() override;

  uint32_t read(uint8_t* buf, uint32_t len);

  void write(const uint8_t* buf, uint32_t len);

  void setFD(int fd) { fd_ = fd; }
  int getFD() { return fd_; }

 protected:
  int fd_;
  ClosePolicy close_policy_;
};

} // namespace transport
} // namespace thrift
} // namespace apache

#endif // #ifndef _THRIFT_TRANSPORT_TFDTRANSPORT_H_