beremiz

Rework of runtime non-real-time threading, and shared object dynamic loading :

2018-04-19, Edouard Tisserant
1fdc32be71b8
Rework of runtime non-real-time threading, and shared object dynamic loading :
- All exposed operations on PLCObject are now serialized through main thread
(@RunInMain). Only one exception : python trace thread calling _GetDebugData
- Re-loading of same shared object is prevented. dlclose/delte/rewrite/dlopen
don't happen in that case. This is a workaround for some xenomai copperplate
bug triggering segfault, inbetween delete and rewrite.
- Trace thread now waits for data, dies if no data, and dies instead of
suspending as before when no data consumed after 3 seconds.
- Disabled threading in Pyro client
- Enforced auxiliary threads starting sequence : Pyro -> [UI] ->
PLCWorker.RunLoop
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
from __future__ import absolute_import
from weakref import ref
class POULibrary(object):
def __init__(self, CTR, LibName, TypeStack):
from PLCControler import PLCControler
self.CTR = ref(CTR)
self.LibName = LibName
self.LibraryControler = PLCControler()
self.LibraryControler.OpenXMLFile(self.GetLibraryPath())
self.LibraryControler.ClearConfNodeTypes()
self.LibraryControler.AddConfNodeTypesList(TypeStack)
self.program = None
def GetSTCode(self):
if not self.program:
self.program = self.LibraryControler.GenerateProgram()[0]+"\n"
return self.program
def GetName(self):
return self.LibName
def GetCTR(self):
return self.CTR()
def GetTypes(self):
return {"name": self.GetName(), "types": self.LibraryControler.Project}
def GetLibraryPath(self):
raise Exception("Not implemented")
def Generate_C(self, buildpath, varlist, IECCFLAGS):
# Pure python or IEC libs doesn't produce C code
return ((""), [], False), ""
def SimplePOULibraryFactory(path):
class SimplePOULibrary(POULibrary):
def GetLibraryPath(self):
return path
return SimplePOULibrary