mdw@git.distorted.org.uk Git - mLib-python/blob - sel-file.pyx

   1 ### -*-pyrex-*-
   2 ###
   3 ### File selectors
   4 ###
   5 ### (c) 2005 Straylight/Edgeware
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the Python interface to mLib.
  11 ###
  12 ### mLib/Python is free software; you can redistribute it and/or modify
  13 ### it under the terms of the GNU General Public License as published by
  14 ### the Free Software Foundation; either version 2 of the License, or
  15 ### (at your option) any later version.
  16 ###
  17 ### mLib/Python is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ### GNU General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with mLib/Python; if not, write to the Free Software Foundation,
  24 ### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25
  26 SEL_READ = _SEL_READ
  27 SEL_WRITE = _SEL_WRITE
  28 SEL_EXCEPT = _SEL_EXC
  29
  30 cdef class SelFile:
  31   cdef sel_file f
  32   cdef int _activep
  33   cdef readonly unsigned mode
  34   cdef _readyfunc
  35   def __cinit__(me, fd, int mode = SEL_READ, readyproc = None,
  36               *hunoz, **hukairz):
  37     if (mode != _SEL_READ and
  38         mode != _SEL_WRITE and
  39         mode != _SEL_EXC):
  40       raise ValueError, 'bad select mode'
  41     sel_initfile(&_sel, &me.f, _getfd(fd), mode, _filefunc, <void *>me)
  42     me._activep = 0
  43     me.mode = mode
  44     me._readyfunc = _checkcallable(readyproc, 'ready proc')
  45   def __dealloc__(me):
  46     if me._activep:
  47       sel_rmfile(&me.f)
  48   property fd:
  49     def __get__(me):
  50       return me.f.fd
  51   property activep:
  52     def __get__(me):
  53       return _tobool(me._activep)
  54   property readyproc:
  55     def __get__(me):
  56       return me._readyfunc
  57     def __set__(me, proc):
  58       me._readyfunc = _checkcallable(proc, 'ready proc')
  59     def __del__(me):
  60       me._readyfunc = None
  61   def enable(me):
  62     if me._activep:
  63       raise ValueError, 'already enabled'
  64     sel_addfile(&me.f)
  65     me._enabled()
  66     return me
  67   def disable(me):
  68     if not me._activep:
  69       raise ValueError, 'already disabled'
  70     sel_rmfile(&me.f)
  71     me._disabled()
  72     return me
  73   def force(me):
  74     sel_force(&me.f)
  75     return me
  76   cdef _enabled(me):
  77     me._activep = 1
  78     me.enabled()
  79   cdef _disabled(me):
  80     me._activep = 0
  81     me.disabled()
  82   def enabled(me):
  83     pass
  84   def disabled(me):
  85     pass
  86   def ready(me):
  87     return _maybecall(me._readyfunc, ())
  88
  89 cdef void _filefunc(int fd, unsigned mode, void *arg):
  90   cdef SelFile sf
  91   sf = <SelFile>arg
  92   sf.ready()
  93
  94 ###----- That's all, folks --------------------------------------------------