text: /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
   *
   * 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 UV_UNIX_INTERNAL_H_
  #define UV_UNIX_INTERNAL_H_
  
  #include "uv-common.h"
  #include "uv-eio.h"
  
  #include <assert.h>
  #include <stdlib.h> /* abort */
  
  #if __STRICT_ANSI__
  # define inline __inline
  #endif
  
  #undef HAVE_FUTIMES
  #undef HAVE_KQUEUE
  #undef HAVE_PORTS_FS
  
  #if __linux__
  # include "linux/syscalls.h"
  # define HAVE_FUTIMES 1 /* emulated with utimesat() */
  #endif /* __linux__ */
  
  #if defined(__sun)
  # include <sys/port.h>
  # include <port.h>
  # ifdef PORT_SOURCE_FILE
  #  define HAVE_PORTS_FS 1
  # endif
  # define HAVE_FUTIMES 1
  # define futimes(fd, tv) futimesat(fd, (void*)0, tv)
  #endif /* __sun */
  
  #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun)
  # define HAVE_FUTIMES 1
  #endif
  
  /* FIXME exact copy of the #ifdef guard in uv-unix.h */
  #if defined(__APPLE__)  \
    || defined(__FreeBSD__) \
    || defined(__OpenBSD__) \
    || defined(__NetBSD__)
  # define HAVE_KQUEUE 1
  #endif
  
  #define UNREACHABLE()                                                         \
    do {                                                                        \
      assert(0 && "unreachable code");                                          \
      abort();                                                                  \
    }                                                                           \
    while (0)
  
  #define SAVE_ERRNO(block)                                                     \
    do {                                                                        \
      int _saved_errno = errno;                                                 \
      do { block; } while (0);                                                  \
      errno = _saved_errno;                                                     \
    }                                                                           \
    while (0)
  
  #define UV__IO_READ  EV_READ
  #define UV__IO_WRITE EV_WRITE
  #define UV__IO_ERROR EV_ERROR
  
  /* flags */
  enum {
    UV_CLOSING          = 0x01,   /* uv_close() called but not finished. */
    UV_CLOSED           = 0x02,   /* close(2) finished. */
    UV_STREAM_READING   = 0x04,   /* uv_read_start() called. */
    UV_STREAM_SHUTTING  = 0x08,   /* uv_shutdown() called but not complete. */
    UV_STREAM_SHUT      = 0x10,   /* Write side closed. */
    UV_STREAM_READABLE  = 0x20,   /* The stream is readable */
    UV_STREAM_WRITABLE  = 0x40,   /* The stream is writable */
    UV_STREAM_BLOCKING  = 0x80,   /* Synchronous writes. */
    UV_TCP_NODELAY      = 0x100,  /* Disable Nagle. */
    UV_TCP_KEEPALIVE    = 0x200,  /* Turn on keep-alive. */
    UV_UDT_RENDEZ       = 0x1000  /* Set UDT socket in rendezvous mode */
  };
  
  inline static void uv__req_init(uv_loop_t* loop,
                                  uv_req_t* req,
                                  uv_req_type type) {
    loop->counters.req_init++;
    req->type = type;
    uv__req_register(loop, req);
  }
  #define uv__req_init(loop, req, type) \
    uv__req_init((loop), (uv_req_t*)(req), (type))
  
  /* core */
  void uv__handle_init(uv_loop_t* loop, uv_handle_t* handle, uv_handle_type type);
  int uv__nonblock(int fd, int set);
  int uv__cloexec(int fd, int set);
  int uv__socket(int domain, int type, int protocol);
  int uv__dup(int fd);
  int uv_async_stop(uv_async_t* handle);
  
  void uv__io_init(uv__io_t* handle, uv__io_cb cb, int fd, int events);
  void uv__io_set(uv__io_t* handle, uv__io_cb cb, int fd, int events);
  void uv__io_start(uv_loop_t* loop, uv__io_t* handle);
  void uv__io_stop(uv_loop_t* loop, uv__io_t* handle);
  void uv__io_feed(uv_loop_t* loop, uv__io_t* handle, int event);
  int uv__io_active(uv__io_t* handle);
  
  /* loop */
  int uv__loop_init(uv_loop_t* loop, int default_loop);
  void uv__loop_delete(uv_loop_t* loop);
  void uv__run_idle(uv_loop_t* loop);
  void uv__run_check(uv_loop_t* loop);
  void uv__run_prepare(uv_loop_t* loop);
  
  /* error */
  uv_err_code uv_translate_sys_error(int sys_errno);
  void uv_fatal_error(const int errorno, const char* syscall);
  
  /* stream */
  void uv__stream_init(uv_loop_t* loop, uv_stream_t* stream,
      uv_handle_type type);
  int uv__stream_open(uv_stream_t*, int fd, int flags);
  void uv__stream_destroy(uv_stream_t* stream);
  void uv__server_io(uv_loop_t* loop, uv__io_t* watcher, int events);
  int uv__accept(int sockfd);
  
  /* tcp */
  int uv_tcp_listen(uv_tcp_t* tcp, int backlog, uv_connection_cb cb);
  int uv__tcp_nodelay(uv_tcp_t* handle, int enable);
  int uv__tcp_keepalive(uv_tcp_t* handle, int enable, unsigned int delay);
  
  /* udt */
  int udt__accept(int sockfd);
  //int udt__connect(uv_connect_t* req, uv_udt_* stream, struct sockaddr* addr,
  //    socklen_t addrlen, uv_connect_cb cb);
  
  int uv_udt_listen(uv_udt_t* tcp, int backlog, uv_connection_cb cb);
  int uv__udt_nodelay(uv_udt_t* handle, int enable);
  int uv__udt_keepalive(uv_udt_t* handle, int enable, unsigned int delay);
  
  /* UDT socket operation */
  int udt__nonblock(int fd, int set) __attribute__((unused));
  int udt__socket(int domain, int type, int protocol);
  
  /* pipe */
  int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb);
  
  /* timer */
  void uv__run_timers(uv_loop_t* loop);
  unsigned int uv__next_timeout(uv_loop_t* loop);
  
  /* various */
  void uv__async_close(uv_async_t* handle);
  void uv__check_close(uv_check_t* handle);
  void uv__fs_event_close(uv_fs_event_t* handle);
  void uv__idle_close(uv_idle_t* handle);
  void uv__pipe_close(uv_pipe_t* handle);
  void uv__poll_close(uv_poll_t* handle);
  void uv__prepare_close(uv_prepare_t* handle);
  void uv__process_close(uv_process_t* handle);
  void uv__stream_close(uv_stream_t* handle);
  void uv__timer_close(uv_timer_t* handle);
  void uv__udp_close(uv_udp_t* handle);
  void uv__udp_finish_close(uv_udp_t* handle);
  
  #ifdef UV__O_NONBLOCK
  # define UV__F_NONBLOCK UV__O_NONBLOCK
  #else
  # define UV__F_NONBLOCK 1
  #endif
  
  int uv__make_socketpair(int fds[2], int flags);
  int uv__make_pipe(int fds[2], int flags);
  
  #endif /* UV_UNIX_INTERNAL_H_ */
  