Check if mutex exists

[antiufo]

How can I check if an AutoIt3 script is running using mutex?

For example, a script calls _Singleton

now I need a script that checks if the first cript is running checking if its mutex exists.

How can I do?

thanks

[martin]

How can I check if an AutoIt3 script is running using mutex?

For example, a script calls _Singleton

now I need a script that checks if the first cript is running checking if its mutex exists.

How can I do?

thanks

The first script runs and calls singleton with the second parameter not set or equal to 0. The first parameter is some string you decide on say $Mstring.

The second program calls _Singleton with the same first parameter $Mstring, and the second parameter equal to 1.

If the value of @error is 183 after calling _Singleton then the program is already running.

Func _Singleton($occurenceName, $flag = 0)
    Local $ERROR_ALREADY_EXISTS = 183
    $occurenceName = StringReplace($occurenceName, "\", ""); to avoid error
;   Local $handle = DllCall("kernel32.dll", "int", "CreateSemaphore", "int", 0, "long", 1, "long", 1, "str", $occurenceName)
    Local $handle = DllCall("kernel32.dll", "int", "CreateMutex", "int", 0, "long", 1, "str", $occurenceName)
    Local $lastError = DllCall("kernel32.dll", "int", "GetLastError")
    If $lastError[0] = $ERROR_ALREADY_EXISTS Then
        If $flag = 0 Then
            Exit -1
        Else
            SetError($lastError[0]);<---flag <>0 so set @error to $ERROR_ALREADY_EXISTS
            Return 0
        EndIf
    EndIf
    Return $handle[0]
EndFunc  ;==>_Singleton

[antiufo]

The first script runs and calls singleton with the second parameter not set or equal to 0. The first parameter is some string you decide on say $Mstring.

The second program calls _Singleton with the same first parameter $Mstring, and the second parameter equal to 1.

If the value of @error is 183 after calling _Singleton then the program is already running.

I don't want to create the mutex if the first script is not running. If I call _Singleton in the second script:

* If the first script is running I get the right return value (OK)

* But if the first script is not running I don't want to create the mutex, I only want to check if the first script is running