text: 
  /*
   * Copyright (C) Igor Sysoev
   * Copyright (C) Nginx, Inc.
   */
  
  
  #ifndef _NGX_SOCKET_H_INCLUDED_
  #define _NGX_SOCKET_H_INCLUDED_
  
  
  #include <ngx_config.h>
  
  
  #define NGX_WRITE_SHUTDOWN SHUT_WR
  
  typedef int  ngx_socket_t;
  
  #define ngx_socket          socket
  #define ngx_socket_n        "socket()"
  
  
  #if (NGX_HAVE_FIONBIO)
  
  int ngx_nonblocking(ngx_socket_t s);
  int ngx_blocking(ngx_socket_t s);
  
  #define ngx_nonblocking_n   "ioctl(FIONBIO)"
  #define ngx_blocking_n      "ioctl(!FIONBIO)"
  
  #else
  
  #define ngx_nonblocking(s)  fcntl(s, F_SETFL, fcntl(s, F_GETFL) | O_NONBLOCK)
  #define ngx_nonblocking_n   "fcntl(O_NONBLOCK)"
  
  #define ngx_blocking(s)     fcntl(s, F_SETFL, fcntl(s, F_GETFL) & ~O_NONBLOCK)
  #define ngx_blocking_n      "fcntl(!O_NONBLOCK)"
  
  #endif
  
  #if (NGX_HAVE_FD_CLOEXEC)
  
  #define ngx_cloexec(s)      fcntl(s, F_SETFD, FD_CLOEXEC)
  #define ngx_cloexec_n       "fcntl(FD_CLOEXEC)"
  
  /* at least FD_CLOEXEC is required to ensure connection fd is closed
   * after execve */
  #define HAVE_SOCKET_CLOEXEC_PATCH  1
  
  #endif
  
  int ngx_tcp_nopush(ngx_socket_t s);
  int ngx_tcp_push(ngx_socket_t s);
  
  #if (NGX_LINUX)
  
  #define ngx_tcp_nopush_n   "setsockopt(TCP_CORK)"
  #define ngx_tcp_push_n     "setsockopt(!TCP_CORK)"
  
  #else
  
  #define ngx_tcp_nopush_n   "setsockopt(TCP_NOPUSH)"
  #define ngx_tcp_push_n     "setsockopt(!TCP_NOPUSH)"
  
  #endif
  
  
  #define ngx_shutdown_socket    shutdown
  #define ngx_shutdown_socket_n  "shutdown()"
  
  #define ngx_close_socket    close
  #define ngx_close_socket_n  "close() socket"
  
  
  #endif /* _NGX_SOCKET_H_INCLUDED_ */
  