X-Git-Url: https://git.distorted.org.uk/~mdw/mLib-python/blobdiff_plain/20bce5e92b01cd928f26b61be78215117039c561..579d01693c86259110fe7a2c2a6f005f1bdbad5b:/sig.pyx

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+# -*-pyrex-*-
+#
+# $Id$
+#
+# In-band signals
+#
+# (c) 2005 Straylight/Edgeware
+#
+
+#----- Licensing notice -----------------------------------------------------
+#
+# This file is part of the Python interface to mLib.
+#
+# mLib/Python is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# mLib/Python is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with mLib/Python; if not, write to the Free Software Foundation,
+# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+import signal
+
+cdef class SelSignal:
+  cdef sig s
+  cdef int _activep
+  cdef readonly int signal
+  cdef _signalled
+  def __new__(me, int sig, signalledproc = None, *hunoz, **hukairz):
+    if sig < 0 or sig >= signal.NSIG:
+      raise ValueError, 'signal number out of range'
+    me.signal = sig
+    me._signalledproc = _checkcallable(signalledproc, 'signalled proc')
+    me._activep = 0
+  def __dealloc__(me):
+    if me._activep:
+      sig_remove(&me.s)
+  property activep:
+    def __get__(me):
+      return _tobool(me._activep)
+  property signalledproc:
+    def __get__(me):
+      return me._signalled
+    def __set__(me, proc):
+      me._signalled = _checkcallable(proc, 'signalled proc')
+    def __del__(me):
+      me._signalled = None
+  def enable(me):
+    if me._activep:
+      raise ValueError, 'already enabled'
+    sig_add(&me.s, me.signal, _sigfunc, <void *>me)
+    me._enabled()
+    return me
+  def disable(me):
+    if not me._activep:
+      raise ValueError, 'already disabled'
+    sig_remove(&me.s)
+    me._disabled()
+    return me
+  cdef _enabled(me):
+    me._activep = 1
+    me.enabled()
+  cdef _disabled(me):
+    me._activep = 0
+    me.disabled()
+  def enabled(me):
+    pass
+  def disabled(me):
+    pass
+  def signalled(me):
+    return _maybecall(me._signalled, ())
+
+cdef void _sigfunc(int sig, void *arg):
+  cdef SelSignal s
+  s = <SelSignal>arg
+  s.signalled()
+
+sig_init(&_sel)
+
+#----- That's all, folks ----------------------------------------------------