🚀 go-pugleaf

In article <1992Apr10.133656.28981@ugle.unit.no>, jlongva@Siri.Unit.NO (J|rgen Longva) writes:
|> 
|> The external routine must pass data back to the windows-program, and I
|> use the hard disk as a buffer:
|> 
|>   // Executes the external routine.
|>   if (WinExec("routine.exe", SW_HIDE) < 32)
|>     --> Error
|> 
|>   // Reads the information returned by the external routine.
|>   if ((file = _open("info.txt", O_RDWR)) == -1)
|>     --> Error
|> 
|>   ...
|> 
|> The problem is that the main-program continues to run - and reaches the
|> line where I open the result-file too early. I've made a .pif-file for
|> the externl routine that checks the "Exclusive"-flag for priority.
|> 
|> How can I check when the external routine is finished? Is there an al-
|> ternative to WinExec(...) (the LoadModule(...) does only work for win-
|> dows .exe-files)?

There are 2 ways to solve this:

1. Use yield() function (proably don't work)
2. Have some synchronization ie: the external routine create a special file
   when it completes its job.  Your main program have to check this file.

Yeah, it does not look great but I think it works.

Natawut Nupairoj.

In article <1992Apr10.133656.28981@ugle.unit.no> jlongva@Siri.Unit.NO
(J|rgen Longva) writes:

> I'm writing a windos-program that must call external .exe-files during
> it's runtime. I use WinExec(...) to do this, but there is a small prob-
> lem with this method: the Windows program does not stop!
> 
> The external routine must pass data back to the windows-program, and I
> use the hard disk as a buffer:
> 
>   // Executes the external routine.
>   if (WinExec("routine.exe", SW_HIDE) < 32)
>     --> Error
> 
>   // Reads the information returned by the external routine.
>   if ((file = _open("info.txt", O_RDWR)) == -1)
>     --> Error
> 
>   ...
> 
> The problem is that the main-program continues to run - and reaches the
> line where I open the result-file too early. I've made a .pif-file for
> the externl routine that checks the "Exclusive"-flag for priority.
> 
> How can I check when the external routine is finished? Is there an al-
> ternative to WinExec(...) (the LoadModule(...) does only work for win-
> dows .exe-files)?

I have done this successfully by using FindWindow to check when
"routine.exe" has terminated.  The code (from memory) looks something like:

	WinExec("routine.exe", SW_HIDE);
	while(FindWindow(NULL, "routine.exe", ...) != NULL)
	{
		; /* Wait until routine.exe terminates... */
	}
	/* Now process the file created by routine.exe: */
	.
	.

I also tried checking for existence of the file created, but this
caused some problems with Win 3.0.

Hope this helps,
	
	Nick 

JANET: JurascheckNH@cs.bham.ac.uk  |  UUCP: ...!mcvax!bhamcs!JurascheckNH
BITNET: JurascheckNH%cs.bham.ac.uk@ukacrl.bitnet
INTERNET: JurascheckNH%cs.bham.ac.uk@cunyvm.cuny.edu
-- 
Nick			
JANET: JurascheckNH@uk.ac.bham.cs  |  UUCP: ...!mcvax!bhamcs!JurascheckNH
BITNET: JurascheckNH%cs.bham.ac.uk@ukacrl.bitnet
INTERNET: JurascheckNH%cs.bham.ac.uk@cunyvm.cuny.edu