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

   1 ### -*-pyrex-*-
   2 ###
   3 ### Timer 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 cdef double _tvtofloat(timeval *tv):
  27   return tv.tv_sec + (tv.tv_usec / 1000000)
  28 cdef void _floattotv(timeval *tv, double t):
  29   cdef double s, us
  30   us = modf(t, &s)
  31   tv.tv_sec = <int>s
  32   tv.tv_usec = <int>(us * 1000000)
  33
  34 cdef class SelTimer:
  35   cdef sel_timer t
  36   cdef int _activep
  37   cdef readonly double time
  38   cdef _timer
  39   def __cinit__(me, double when, timerproc = None, *hunoz, **hukairz):
  40     cdef timeval tv
  41     _floattotv(&tv, when)
  42     sel_addtimer(&_sel, &me.t, &tv, _timerfunc, <void *>me)
  43     me._activep = 1
  44     me.time = when
  45     me._timer = _checkcallable(timerproc, 'timer proc')
  46   def __dealloc__(me):
  47     if me._activep:
  48       sel_rmtimer(&me.t)
  49   property activep:
  50     def __get__(me):
  51       return _tobool(me._activep)
  52   property timerproc:
  53     def __get__(me):
  54       return me._timer
  55     def __set__(me, proc):
  56       me._timer = _checkcallable(proc, 'timer proc')
  57     def __del__(me):
  58       me._timer = None
  59   def kill(me):
  60     if not me._activep:
  61       raise ValueError, 'already dead'
  62     sel_rmtimer(&me.t)
  63     me._dead()
  64     return me
  65   cdef _dead(me):
  66     me._activep = 0
  67     me.dead()
  68   def dead(me):
  69     pass
  70   def timer(me, now):
  71     return _maybecall(me._timer, ())
  72
  73 cdef void _timerfunc(timeval *now, void *arg):
  74   cdef SelTimer st
  75   st = <SelTimer>arg
  76   st._dead()
  77   st.timer(_tvtofloat(now))
  78
  79 ###----- That's all, folks --------------------------------------------------