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

   1 # -*-pyrex-*-
   2 #
   3 # $Id$
   4 #
   5 # Timer selectors
   6 #
   7 # (c) 2005 Straylight/Edgeware
   8 #
   9
  10 #----- Licensing notice -----------------------------------------------------
  11 #
  12 # This file is part of the Python interface to mLib.
  13 #
  14 # mLib/Python is free software; you can redistribute it and/or modify
  15 # it under the terms of the GNU General Public License as published by
  16 # the Free Software Foundation; either version 2 of the License, or
  17 # (at your option) any later version.
  18 #
  19 # mLib/Python is distributed in the hope that it will be useful,
  20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 # GNU General Public License for more details.
  23 #
  24 # You should have received a copy of the GNU General Public License
  25 # along with mLib/Python; if not, write to the Free Software Foundation,
  26 # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27
  28 cdef double _tvtofloat(timeval *tv):
  29   return tv.tv_sec + (tv.tv_usec / 1000000)
  30 cdef void _floattotv(timeval *tv, double t):
  31   cdef double s, us
  32   us = modf(t, &s)
  33   tv.tv_sec = s
  34   tv.tv_usec = us * 1000000
  35
  36 cdef class SelTimer:
  37   cdef sel_timer t
  38   cdef int _activep
  39   cdef readonly double time
  40   cdef _timer
  41   def __new__(me, double when, timerproc = None, *hunoz, **hukairz):
  42     cdef timeval tv
  43     _floattotv(&tv, when)
  44     sel_addtimer(&_sel, &me.t, &tv, _timerfunc, <void *>me)
  45     me._activep = 1
  46     me.time = when
  47     me._timer = _checkcallable(timerproc, 'timer proc')
  48   def __dealloc__(me):
  49     if me._activep:
  50       sel_rmtimer(&me.t)
  51   property activep:
  52     def __get__(me):
  53       return _tobool(me._activep)
  54   property timerproc:
  55     def __get__(me):
  56       return me._timer
  57     def __set__(me, proc):
  58       me._timer = _checkcallable(proc, 'timer proc')
  59     def __del__(me):
  60       me._timer = None
  61   def kill(me):
  62     if not me._activep:
  63       raise ValueError, 'already dead'
  64     sel_rmtimer(&me.t)
  65     me._dead()
  66     return me
  67   cdef _dead(me):
  68     me._activep = 0
  69     me.dead()
  70   def dead(me):
  71     pass
  72   def timer(me, now):
  73     return _maybecall(me._timer, ())
  74
  75 cdef void _timerfunc(timeval *now, void *arg):
  76   cdef SelTimer st
  77   st = <SelTimer>arg
  78   st._dead()
  79   st.timer(_tvtofloat(now))
  80
  81 #----- That's all, folks ----------------------------------------------------