Timers and loops

[Enrico Maria Giordano]

Thank you, but you still missed the point. Please re-read my previous messages.

EMG

[Jack]

Here is what i do :

static osuivi,osays1,wvars2
function main()
local ii
wvars2:=0
suivi()
*
ii:=0
do while ! eof()
wvars2:=ii
oSays1:setText(wvars2)
oSays1:refresh()
i++

* a lot of action

SKIP
enddo
*
oSuivi:end()
*
return .T.


* ===
procedure suivi()
DEFINE DIALOG oSuivi TITLE "Progress info" FROM 3,3 TO 8,50
@ 1,1 say oSays1 prompt wVars2 UPDATE of oSuivi size 80,10
ACTIVATE DIALOG oSuivi NOWAIT CENTERED
RETURN

[Enrico Maria Giordano]

Thank you. Sorry, I already use a similar technique in specific loops but its application in all the existing loops would require too much work (I have 348 PRGs containing such loops or iterative command like REPLACE ... FOR, etc.).

EMG

[Antonio Linares]

Enrico,

You could show an AVI file in your MsgBox() function

[Enrico Maria Giordano]

I think the AVI stops the animation too, if it uses a timer. Am I wrong?

EMG

[James Bott]

Enrico,

> Anyway, I don't really need to get the rest of the system responding fast during my waiting loops.

Maybe you don't care but your users probably do. Perhaps they want to do something else while waiting, like check their email or something. It is good and polite practice to put sysrefresh() in all loops that take more that a few seconds to complete.

I hate it when an application freezes my computer.

Ewe's idea is also a good one. For up to about 10-15 seconds I would use an hourglass cursor, for more time I would use a progress bar if possible, or some kind of animation if you do not have the data for a progress bar.

Regards,
James

[Enrico Maria Giordano]

I agree. But I just can not afford the huge work necessary to change all of my loops. And some of them are not explicit loops as INDEX ON or REPLACE ALL.

EMG

[Patrizio]

No, other apps don't stop. Maybe I can use threads but I'm not familiar with them.

EMG

You can't use mt with FiveWin

[Antonio Linares]

Patrizio,

Have you tried to use mt with FiveWin ?

mt should work fine except for some GUI components (modal dialog boxes)

[anserkk]

Dear Mr.Antonio,

mt should work fine except for some GUI components (modal dialog boxes)

Can we have a small sample demonstrating the usage of multi threading with Fivewin. Do xHarbour support this ?

Regards
Anser

[Patrizio]

Patrizio,

Have you tried to use mt with FiveWin ?

mt should work fine except for some GUI components (modal dialog boxes)

Antonio, i just read your first post in this thread: viewtopic.php?f=3&t=10439&hilit=multithread

Once there is a good support for threads in Harbour/xHarbour, then we will be able to adapt FWH to multithreading.

But, i've tried a small sample and it works fine. So, can we use multi-thread with FWH? When we can use it with modal dialog boxes? Which GUI components don't work?

@Anserkk: this is compiled with FWH and xHarbour. Remark to check the "multi thread support" on xbuilder.

Code: Select all  Expand view

#include "Fivewin.ch"

PROC Main()
   LOCAL aObj  := Array(1000000)
   LOCAL oDlg, oButton
   PUBLIC nDestroyed := 0
   DEFINE DIALOG oDlg SIZE 400, 500
   @ 11,  0 BUTTON    oButton     PROMPT "Start"    SIZE 80,  8 ACTION Button1_Click(oDlg)
   ACTIVATE DIALOG oDlg CENTER
RETURN

PROC Button1_Click(oDlg)
   LOCAL n        := 0
   LOCAL pMutex   := HB_MutexCreate()
   FOR n :=1 TO 10
      StartThread( "MyFuncForThreads", pMutex, oDlg, n )
   NEXT
   WaitForThreads()
RETURN

PROC MyFuncForThreads(pMutex,oDlg,n)
   LOCAL cTID
   HB_MutexLock(pMutex)
   oDlg:Say(n,0,"Thread ID" + lTrim(Str(GetThreadID())) + " system id: " + lTrim(Str(GetSystemThreadID())))
   HB_MutexUnlock(pMutex)
RETURN

[anserkk]

Dear Mr.Patrizio,

Thanks for the sample. Which xHarbour lib is to be added. I am getting unresolved external

When I tried to use BuildX.Bat then the following xHarbour functions are missing

Code: Select all  Expand view

HB_MUTEXCREATE
STARTTHREAD
WAITFORTHREADS
MUTEXLOCK
GETTHREADID
GETSYSTEMTHREADID
MUTEXUNLOCK
 

When I tried to use BuildH.Bat then the following Harbour functions are missing.

Code: Select all  Expand view

STARTTHREAD
WAITFORTHREADS
GETTHREADID
GETSYSTEMTHREADID

Regards
Anser

[Patrizio]

Dear Mr.Patrizio,

Thanks for the sample. Which xHarbour lib is to be added. I am getting unresolved external

You must use the lib with the sufix "MT" when they are present... i see on my linker log this: "OptGMT.lib" "xhbmt.lib" "dbfmt.lib" "nsxmt.lib" "ntxmt.lib" "cdxmt.lib" crtmt.lib

[anserkk]

Hi,

xHarbour VmMt.Lib contains all the missing MultiThread related functions

Code: Select all  Expand view

HB_MUTEXCREATE
STARTTHREAD
WAITFORTHREADS
MUTEXLOCK
GETTHREADID
GETSYSTEMTHREADID
MUTEXUNLOCK

Unfortunately when I compile, I am still getting Unresolved Externals calls from VmMt.Lib to the following functions

__endthreadex
__beginthreadex


Regards
Anser

[Patrizio]

Hi,

xHarbour VmMt.Lib contains all the missing MultiThread related functions

Code: Select all  Expand view

HB_MUTEXCREATE
STARTTHREAD
WAITFORTHREADS
MUTEXLOCK
GETTHREADID
GETSYSTEMTHREADID
MUTEXUNLOCK

Unfortunately when I compile, I am still getting Unresolved Externals calls from VmMt.Lib to the following functions

__endthreadex
__beginthreadex


Regards
Anser

crtmt.lib