Method close

3rdparty/cppdap/src/socket.cpp:181–210

  }

  void close() {
    {
      RLock l(mutex);
      if (s != InvalidSocket) {
#if defined(_WIN32)
        closesocket(s);
#elif __APPLE__
        // ::shutdown() *should* be sufficient to unblock ::accept(), but
        // apparently on macos it can return ENOTCONN and ::accept() continues
        // to block indefinitely.
        // Note: There is a race here. Calling ::close() frees the socket ID,
        // which may be reused before `s` is assigned InvalidSocket.
        ::shutdown(s, SHUT_RDWR);
        ::close(s);
#else
        // ::shutdown() to unblock ::accept(). We'll actually close the socket
        // under lock below.
        ::shutdown(s, SHUT_RDWR);
#endif
      }
    }

    WLock l(mutex);
    if (s != InvalidSocket) {
#if !defined(_WIN32) && !defined(__APPLE__)
      ::close(s);
#endif
      s = InvalidSocket;
    }
  }

  size_t read(void* buffer, size_t bytes) {
    RLock lock(mutex);