~mdw / mLib-python / blame
| Commit | Line | Data |
|---|---|---|
| 5b1830f3 MW |
1 | ### -*-pyrex-*- |
| 2 | ### | |
| 3 | ### In-band signals | |
| 4 | ### | |
| 5 | ### (c) 2005 Straylight/Edgeware | |
| 6 | ### | |
| 579d0169 | 7 | |
| 5b1830f3 MW |
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. | |
| 579d0169 | 25 | |
| 26 | import signal | |
| 27 | ||
| 28 | cdef class SelSignal: | |
| addc0c37 MW |
29 | """ |
| 30 | SelSignal(SIG, [signalledproc = None]) | |
| 31 | ||
| 32 | Collect signals from the event loop. | |
| 33 | """ | |
| 579d0169 | 34 | cdef sig s |
| 35 | cdef int _activep | |
| 36 | cdef readonly int signal | |
| 37 | cdef _signalled | |
| 376ad06d | 38 | def __cinit__(me, int sig, signalledproc = None, *hunoz, **hukairz): |
| 579d0169 | 39 | if sig < 0 or sig >= signal.NSIG: |
| 40 | raise ValueError, 'signal number out of range' | |
| 41 | me.signal = sig | |
| bd3ac9d3 | 42 | me._signalled = _checkcallable(signalledproc, 'signalled proc') |
| 579d0169 | 43 | me._activep = 0 |
| 44 | def __dealloc__(me): | |
| 45 | if me._activep: | |
| 46 | sig_remove(&me.s) | |
| 47 | property activep: | |
| addc0c37 | 48 | """SS.activep -> BOOL: is the handler still active?""" |
| 579d0169 | 49 | def __get__(me): |
| 50 | return _tobool(me._activep) | |
| 51 | property signalledproc: | |
| addc0c37 | 52 | """SS.signalledproc -> FUNC: call FUNC() when the signal is received""" |
| 579d0169 | 53 | def __get__(me): |
| 54 | return me._signalled | |
| 55 | def __set__(me, proc): | |
| 56 | me._signalled = _checkcallable(proc, 'signalled proc') | |
| 57 | def __del__(me): | |
| 58 | me._signalled = None | |
| 59 | def enable(me): | |
| addc0c37 | 60 | """SS.enable(): enable the handler""" |
| 579d0169 | 61 | if me._activep: |
| 62 | raise ValueError, 'already enabled' | |
| 63 | sig_add(&me.s, me.signal, _sigfunc, <void *>me) | |
| 64 | me._enabled() | |
| 65 | return me | |
| 66 | def disable(me): | |
| addc0c37 | 67 | """SS.disable(): disable the handler""" |
| 579d0169 | 68 | if not me._activep: |
| 69 | raise ValueError, 'already disabled' | |
| 70 | sig_remove(&me.s) | |
| 71 | me._disabled() | |
| 72 | return me | |
| 73 | cdef _enabled(me): | |
| 74 | me._activep = 1 | |
| 75 | me.enabled() | |
| 76 | cdef _disabled(me): | |
| 77 | me._activep = 0 | |
| 78 | me.disabled() | |
| 79 | def enabled(me): | |
| addc0c37 | 80 | """SS.enabled(): called when handler is enabled""" |
| 579d0169 | 81 | pass |
| 82 | def disabled(me): | |
| addc0c37 | 83 | """SS.disabled(): called when handler is disabled""" |
| 579d0169 | 84 | pass |
| 85 | def signalled(me): | |
| addc0c37 | 86 | """SS.signalled(): called when the signal is received""" |
| 579d0169 | 87 | return _maybecall(me._signalled, ()) |
| 88 | ||
| b51b6cf0 | 89 | cdef void _sigfunc(int sig, void *arg): |
| 579d0169 | 90 | cdef SelSignal s |
| 91 | s = <SelSignal>arg | |
| 92 | s.signalled() | |
| 93 | ||
| 94 | sig_init(&_sel) | |
| 95 | ||
| 5b1830f3 | 96 | ###----- That's all, folks -------------------------------------------------- |