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1 | # -*-pyrex-*- |
2 | # |
3 | # $Id$ |
4 | # |
5 | # In-band signals |
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. |
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18 | # |
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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. |
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23 | # |
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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 | import signal |
29 | |
30 | cdef class SelSignal: |
31 | cdef sig s |
32 | cdef int _activep |
33 | cdef readonly int signal |
34 | cdef _signalled |
35 | def __new__(me, int sig, signalledproc = None, *hunoz, **hukairz): |
36 | if sig < 0 or sig >= signal.NSIG: |
37 | raise ValueError, 'signal number out of range' |
38 | me.signal = sig |
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39 | me._signalled = _checkcallable(signalledproc, 'signalled proc') |
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40 | me._activep = 0 |
41 | def __dealloc__(me): |
42 | if me._activep: |
43 | sig_remove(&me.s) |
44 | property activep: |
45 | def __get__(me): |
46 | return _tobool(me._activep) |
47 | property signalledproc: |
48 | def __get__(me): |
49 | return me._signalled |
50 | def __set__(me, proc): |
51 | me._signalled = _checkcallable(proc, 'signalled proc') |
52 | def __del__(me): |
53 | me._signalled = None |
54 | def enable(me): |
55 | if me._activep: |
56 | raise ValueError, 'already enabled' |
57 | sig_add(&me.s, me.signal, _sigfunc, <void *>me) |
58 | me._enabled() |
59 | return me |
60 | def disable(me): |
61 | if not me._activep: |
62 | raise ValueError, 'already disabled' |
63 | sig_remove(&me.s) |
64 | me._disabled() |
65 | return me |
66 | cdef _enabled(me): |
67 | me._activep = 1 |
68 | me.enabled() |
69 | cdef _disabled(me): |
70 | me._activep = 0 |
71 | me.disabled() |
72 | def enabled(me): |
73 | pass |
74 | def disabled(me): |
75 | pass |
76 | def signalled(me): |
77 | return _maybecall(me._signalled, ()) |
78 | |
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79 | cdef void _sigfunc(int sig, void *arg): |
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80 | cdef SelSignal s |
81 | s = <SelSignal>arg |
82 | s.signalled() |
83 | |
84 | sig_init(&_sel) |
85 | |
86 | #----- That's all, folks ---------------------------------------------------- |