Yes, there had been this big fat error. The error had been fixed in the last release (pvbrowser 4.7.4) See: ...
2225
Keo
dk39dj24lsm
May 9, 2013 5:25 am
Yes, it solved the issue....
2226
Keo
dk39dj24lsm
May 13, 2013 11:05 am
Hello, I'm considering a project to develop a new modbus daemon able to: - communicate simultaneously with multiple slaves; - store (take) the data into (from)...
2227
Keo
dk39dj24lsm
May 13, 2013 11:06 am
Or, better, build and configure the modbus object in each thread.....
2228
pvbrowser
May 13, 2013 11:49 am
When i understand you right the question is howto supply parameters to the thread. See: ...
2229
Arian Mares
dk39dj24lsm
May 13, 2013 11:54 am
Not quite, I know how to suppply parameters to the thread! I was needed just an opinion about the software structure, maybe you know some issues regarding...
2230
pvbrowser
May 13, 2013 12:10 pm
... With Threads you have to take care about "critical sections" of course. You may have to use rlMutex class for this (lock()/unlock()). You will have to...
2231
Arian Mares
dk39dj24lsm
May 13, 2013 12:15 pm
Thanks for advice. I plan to write directly in a database. I have some experience using libpq (the postgresql access library) in an multithreading environment...
2232
pvbrowser
May 13, 2013 12:24 pm
... Then please have a look into: pvbaddon/templates/qtDatabase There it is shown how you can use the Qt database classes. These database classes work with /**...
2233
mhe_fr
May 13, 2013 4:07 pm
Hi I have post in "file" section a multithread siemensdaemon. siemenssvc.zip This deamon runs for a few weeks in production connected with 10 Siemens Logo on...
2234
pvbrowser
May 13, 2013 4:47 pm
... Thank you very much for the code. Meanwhile i also did some work on a replacement for xyntservice. See: "Download of pvservice.tar.gz" on the bottom right...
2235
mhe_fr
May 14, 2013 2:36 pm
Hi, I'm trying to use SVG with LUA. In main.lua I declare in global variable svga = rllib.rlSvgAnimator() after in mask1_slot.lua function slotInit(p) ...
2236
pvbrowser
May 14, 2013 5:53 pm
Scripting languages like Lua are not able to handle pointers directly. Thus there is a small helper function for setting the socket. Instead of ...
2237
mhe_fr
May 15, 2013 5:54 am
Thank you. It's Ok now...
2238
mhe_fr
May 22, 2013 8:05 am
Hi, I'm working with LUA and MySQL via ODBC Driver on Windows. The QtDatabase::nextRecord don't detect end of Records. I've tested this modification of...
2239
pvbrowser
May 22, 2013 8:39 am
Within pvbaddon/demos/lua/modbus/main.lua you can find an example for database access from lua. qtdb = pv.qtDatabase() -- declare a Qt Database -- open the...
2240
mhe_fr
May 22, 2013 11:09 am
I have no problem to access database. qtdb.open returns 0. but when I try this qtdb.query(qtdb,p,"select machine, production, ejection from prodheurep3j") mt =...
2241
pvbrowser
May 22, 2013 1:54 pm
The Reference for the Qt classes for database handling can be found here. http://qt-project.org/doc/qt-4.8/qtsql.html This is our binding query function. int...
2242
mhe_fr
May 22, 2013 2:30 pm
... Yes, I get correct values with the first records but the loop never ends. It seems that record.isEmpty() is not a good condition to test the end of...
2243
pvbrowser
May 22, 2013 4:46 pm
Can you test result->next() == false by modifying the sourcecode and recompile ? If not you could insert some other terminator within the table and test...
2244
mhe_fr
6:03 am
... It was the object of my first message. It works with result->next() == false....
2245
pvbrowser
7:11 am
... When you do programming with C/C++ you will have full access to the Qt database library. When programming with Lua we need a language binding. This...
2246
mhe_fr
8:28 am
... Yes it was the subject of my first message and I send you the modification of qtdatabase.cpp for qtDatabase::nextRecord() I have compiled the langauge...
2247
pvbrowser
8:55 am
... I agree with you and inserted your change into the sourcecode. Since the language binding for Qt database functions is very basic you might want to add...
2248
mhe_fr
2:22 pm
Hi, I need help pvslua crashes when I use qtDatabase and when there is multiple connections. When I close one session, pvslua crahes. I suspect that it is...
2249
pvbrowser
2:40 pm
You can use pvlock(p)/pvunlock(p) when there are critical sections within your application. ...
2251
mhe_fr
3:54 pm
... For me it's not a critical section. I belive that because for QT, QSqlDatabase is a value class, when we close the database in one thread the other thread...
2252
mhe_fr
4:10 pm
I have make this test : I connect the first pvbrowser to my server : I can see tree sockets open on pvslua : - one listening for new connection, - one...
2253
pvbrowser
4:36 pm
Oh, this seems to be a severe problem. In pvslua be use 1 independent Lua interpreter for each client. The different clients do not know anything from the...
2254
pvbrowser
5:10 pm
I suggest the following solution. Use rlMailbox class and send something like "Please write result to tmp.csv query=select something from table" to your...
