beremiz

stop PLC before unloading

2016-12-07, Andrey Skvortsov
f5868f866d2b
stop PLC before unloading


This fixes segmentation fault if service was quit without stopping it.
It has happened if Beremiz service was quit using taskbar icon or by
closing Beremiz IDE (in case of autostarted local service).

In second case to trigger the bug following step has to be done:
1. Open Beremiz IDE
2. Open project, compile and connect to LOCAL:// runtime
3. Transfer and start the PLC program
4. Open other project without disconneting the PLC runtime
5. Close Beremiz IDE
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<Python xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.w3.org/2001/XMLSchema" xsi:schemaLocation="py_ext_xsd.xsd">
<![CDATA[import threading, time
MyT = None
Stop = False
def StartLog():
global MyT
MyT=threading.Thread(target = DoLog)
MyT.start()
def DoLog():
global Stop
while not Stop:
PLCObject.LogMessage("Python side Logging (PLC is %s)"%PLCObject.PLCStatus)
time.sleep(0.3)
def StopLog():
global MyT,Stop
Stop=True
_runtime_init.append(StartLog)
_runtime_cleanup.append(StopLog)
]]>
</Python>