1  #ifndef	_HURD_FD_H
       2  #include_next <hurd/fd.h>
       3  
       4  #ifndef _ISOMAC
       5  #include <libc-lock.h>
       6  
       7  struct _hurd_fd_port_use_data
       8    {
       9       struct hurd_fd *d;
      10       struct hurd_userlink ulink, ctty_ulink;
      11       io_t port, ctty;
      12    };
      13  
      14  extern void _hurd_fd_port_use_cleanup (void *arg);
      15  
      16  /* Like HURD_DPORT_USE, but cleans fd on cancel.  */
      17  #define HURD_DPORT_USE_CANCEL(fd, expr) \
      18    HURD_FD_USE ((fd), HURD_FD_PORT_USE_CANCEL (descriptor, (expr)))
      19  
      20  /* Like HURD_FD_PORT_USE, but cleans fd on cancel.  */
      21  #define	HURD_FD_PORT_USE_CANCEL(fd, expr)				      \
      22    ({ error_t __result;							      \
      23       struct _hurd_fd_port_use_data __d;					      \
      24       io_t port, ctty;							      \
      25       void *__crit;							      \
      26       __d.d = (fd);							      \
      27       __crit = _hurd_critical_section_lock ();				      \
      28       __spin_lock (&__d.d->port.lock);					      \
      29       if (__d.d->port.port == MACH_PORT_NULL)				      \
      30         {								      \
      31  	 __spin_unlock (&__d.d->port.lock);				      \
      32  	 _hurd_critical_section_unlock (__crit);			      \
      33  	 __result = EBADF;						      \
      34         }								      \
      35       else								      \
      36         {								      \
      37  	 __d.ctty = ctty = _hurd_port_get (&__d.d->ctty, &__d.ctty_ulink);    \
      38  	 __d.port = port = _hurd_port_locked_get (&__d.d->port, &__d.ulink);  \
      39  	 __libc_cleanup_push (_hurd_fd_port_use_cleanup, &__d);		      \
      40  	 _hurd_critical_section_unlock (__crit);			      \
      41  	 __result = (expr);						      \
      42  	 __libc_cleanup_pop (1);					      \
      43         }								      \
      44       __result; })
      45  
      46  libc_hidden_proto (_hurd_intern_fd)
      47  libc_hidden_proto (_hurd_fd_error)
      48  libc_hidden_proto (_hurd_fd_error_signal)
      49  #  ifdef _HURD_FD_H_HIDDEN_DEF
      50  libc_hidden_def (_hurd_fd_error)
      51  libc_hidden_def (_hurd_fd_error_signal)
      52  #  endif
      53  #endif
      54  #endif