Program single instance

[AustrianOak]

What is the function or what will make my script run only once at a time. I know the code for this in autohotkey is #SingleInstance...

Thanks in advance,..

[SinkoDemio]

_SingleTon(@ScriptName)

[danielkza]

_SingleTon(@ScriptName)

I don't think this will work because changing executable/script name will change the singleton identifier and allow a second instance.

Try using a fixed phrase.

[SmOke_N]

I don't think this will work because changing executable/script name will change the singleton identifier and allow a second instance.

Try using a fixed phrase.

You can use any string as the singleton identifier.... I wouldn't use the executable name, just type in something like: _SingleTon("MyUniqueStringToOnlyRunThisOnce")

[AustrianOak]

what do you mean by a unique string?

[SmOke_N]

what do you mean by a unique string?

I gave you an example of a "Unique" string, something you feel no other program would be using.

Edit:

You could even create a GUID to use with it, but you don't have to be so elaborate.

Edited May 6, 2008 by SmOke_N

[Vindicator209]

_SingleTon(@ScriptName)

will work fine, I think ScriptName returns the name no matter what they change it to

[danielkza]

_SingleTon(@ScriptName)

will work fine, I think ScriptName returns the name no matter what they change it to

From HelpFile:

Filename of the running script.

That means if you run the script,change it's name and run it again,the _Singleton strings will be different,and it will not detect the new instance.

You must use a fixed,literal,non-changing string,such as "My Program Singleton that never changes",to make sure no 'cheating' is possible.

[PsaltyDS]

_SingleTon(@ScriptName)

will work fine, I think ScriptName returns the name no matter what they change it to

You are wrong and SmOke_N is right.

Compile this script as Test.exe:

#include <Misc.au3>
If _Singleton(@ScriptName, 1) Then 
    MsgBox(64, "Singleton", "Singleton")
Else
    MsgBox(16, "Not Singleton", "Not Singleton")
EndIf

Now copy Test.exe to Test_New.exe and then run them both... They both say singleton.

Repeat the experiment with this code:

#include <Misc.au3>
If _Singleton("MyUniqueStringToOnlyRunThisOnce", 1) Then 
    MsgBox(64, "Singleton", "Singleton")
Else
    MsgBox(16, "Not Singleton", "Not Singleton")
EndIf

Now the second instance reports "Not Singleton".