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ahklerner
PostPosted: July 2nd, 2007, 8:25 pm 
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Joined: June 26th, 2006, 6:14 pm
Posts: 1379
Location: USA
Can it be used script to script ?

This does not work for me. Running script 1 should give 3 message boxes. I don't even get 1.

Script1.ahk
Code:
#Persistent

CB1   := RegisterCallback("CallBack1")
CB2 := RegisterCallback("Callback2")
Run, %A_AhkPath% Script2.ahk %CB1% %CB2%
return

CallBack1(Val)
   {
   MsgBox,Callback1 %Val%
   }
   
CallBack2(Val)
   {
   MsgBox,Callback2 %Val%
   }

   
Esc::ExitApp

Script2.ahk
Code:
CB1Addr = %1%
CB2Addr = %2%

CB1 := DllCall(CB1Addr,int,1)
CB2 := DllCall(CB2Addr,int,2)

MsgBox, CB1 - %CB1%`nCB2 - %CB2%
return


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daniel2
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PostPosted: July 3rd, 2007, 12:00 am 
I can't see what is wrong with this either :(
This was something I have been meaning to experiment with.. but haven't tried until now. The errorlevel from dllcall on your script2 is 0xC0000005 (access violation).. but same call works fine from script1 :?:


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engunneer
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PostPosted: July 3rd, 2007, 12:12 am 
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Joined: August 30th, 2005, 8:43 pm
Posts: 8647
Location: Salem, MA
that is probably too close to each reading the other's process memory.

does it work if you #include it instead of running it?

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daniel2
 Post subject:
PostPosted: July 3rd, 2007, 12:26 am 
engunneer wrote:
does it work if you #include it instead of running it?
Well yes.. but that defeats the script to script communication trying to be accomplished since it would all be from within the same processor thread..


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engunneer
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PostPosted: July 3rd, 2007, 6:55 am 
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I know, but it proves all the other code is correct (no typos anyway)

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Helpy
PostPosted: July 3rd, 2007, 12:18 pm 
ahklerner wrote:
Can it be used script to script ?
No.

As engunneer says, they run in different memory areas, so you can't use this.


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ahklerner
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PostPosted: July 3rd, 2007, 2:06 pm 
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Posts: 1379
Location: USA
How can the system run it then...there must be a way.


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Helpy
 Post subject:
PostPosted: July 3rd, 2007, 4:01 pm 
ahklerner wrote:
How can the system run it then...
Run what?


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ahklerner
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PostPosted: July 3rd, 2007, 9:49 pm 
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Joined: June 26th, 2006, 6:14 pm
Posts: 1379
Location: USA
the machine code that is at the address given by RegisterCallback


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daniel2
 Post subject:
PostPosted: July 3rd, 2007, 10:01 pm 
Quote:
Upon success, RegisterCallback() returns a numeric address that may be called by DllCall() or anything else capable of calling a machine-code function.

I interpret the anything else to actually mean anything else!! There has to be a way; otherwise- I think that the documentation should be adjusted to help clearify.


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Helpy
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PostPosted: July 4th, 2007, 4:03 pm 
ahklerner wrote:
the machine code that is at the address given by RegisterCallback
The system is the OS: it knows what is the memory mapping of each application it runs...
Same for a DLL use with LoadLibrary: its functions run in the same memory space as the program.
The second script doesn't has this knowledge, it is a separate process.

Now, daniel2 has a point, it is a limitation...


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daniel2
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PostPosted: July 5th, 2007, 10:11 pm 
Helpy wrote:
Same for a DLL use with LoadLibrary: its functions run in the same memory space as the program. The second script doesn't has this knowledge, it is a separate process....
Documentation wrote:
anything else capable of calling a machine-code function
So basically-- your saying that your registercallback address can't be called by anything else except the parent script-- or a dllcall in the parent script :?:


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daniel2
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PostPosted: August 2nd, 2007, 10:44 pm 
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Joined: July 23rd, 2007, 3:43 am
Posts: 47
ahklerner- Although it doesn't use register callback, majkinetor put together an excellant function to handle instant communication between scripts.

IPC - Inter Process Communication


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Superfraggle
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PostPosted: August 3rd, 2007, 2:55 am 
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Joined: November 2nd, 2004, 2:43 pm
Posts: 1019
Location: London, UK
i could be way of the mark here, but i believe nircmd from www.nirsoft.net allows you to read a processes memory, could you combine the two????

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daniel2
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PostPosted: August 3rd, 2007, 6:02 am 
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Joined: July 23rd, 2007, 3:43 am
Posts: 47
Superfraggle wrote:
i believe nircmd from www.nirsoft.net allows you to read a processes memory
I believe the point of this thread was to establish communication from one script to another (for passing values back and forth..). Although the experiments w/ registercallback didn't lead to anything- IPC does.

Superfraggle wrote:
could you combine the two????
I'm not sure I understand; Combine the two what?? the nircmd, IPC, registercallback, other ?

Superfraggle wrote:
i could be way of the mark here
There's always a chance :D


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