text: //
  //  BRSocketHelpers.h
  //  BreadWallet
  //
  //  Created by Samuel Sutch on 2/17/16.
  //  Copyright (c) 2018 Bitcorewallet Team
  //
  //  Permission is hereby granted, free of charge, to any person obtaining a copy
  //  of this software and associated documentation files (the "Software"), to deal
  //  in the Software without restriction, including without limitation the rights
  //  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  //  copies of the Software, and to permit persons to whom the Software is
  //  furnished to do so, subject to the following conditions:
  //
  //  The above copyright notice and this permission notice shall be included in
  //  all copies or substantial portions of the Software.
  //
  //  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  //  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  //  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  //  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  //  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  //  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  //  THE SOFTWARE.
  
  #ifndef BRSocketHelpers_h
  #define BRSocketHelpers_h
  
  #include <stdio.h>
  
  int bw_nbioify(int fd);
  
  struct bw_select_request {
      int write_fd_len;
      int read_fd_len;
      int *write_fds;
      int *read_fds;
  };
  
  struct bw_select_result {
      int error; // if > 0 there is an error
      int write_fd_len;
      int read_fd_len;
      int error_fd_len;
      int *write_fds;
      int *read_fds;
      int *error_fds;
  };
  
  struct bw_select_result bw_select(struct bw_select_request);
  
  #endif /* BRSocketHelpers_h */
  