How to kill a mutex?

[lurikeen]

I've seen that AutoHotKeyNet has the following function:

<KillMutex>

However, Google is failing to show me any results for autoit having something similar, and I vastly prefer Autoit.

I know how to kill the mutex in process explorer, but I want a standalone application to be able to do it.

the path for the mutex is: \BaseNamedObjects\DAoCi1

I wish I knew what exactly that path meant (if anyone knows a term I should Google to learn about that please let me know). This is the AHK script to kill the mutex:

<Hotkey F1>
   <SendPC Local>
   <KillMutex \BaseNamedObjects\DAoCi1>
   <KillMutex \BaseNamedObjects\DAoCi2>

So, my question is: How can I kill this mutex in autoit? And also, where can I find a list of UDF's not included in the standard Autoit install?

Thanks!

[/dev/null]

So, my question is: How can I kill this mutex in autoit? And also, where can I find a list of UDF's not included in the standard Autoit install?

Thanks!

you could ask in the hotkeynet forum how KillMutex is implemented and the use DllCall() to do the same, if possible.

Kurt

[lurikeen]

you could ask in the hotkeynet forum how KillMutex is implemented and the use DllCall() to do the same, if possible.

Kurt

I tried to look at the source code (AutoHotKey is open source) but I couldn't find the killmutex function. I probably just don't know where to look.

But, the idea is, I get the source code in something like C or C++, and make it into a DLL so my autoit script can call it? So I should be asking for the source code for that function, right?

[Andreik]

If you know the handle of mutex this shoud kill the mutex:

DllCall("kernel32.dll", "int", "ReleaseMutex", "hwnd", $hMutex)
DllCall("kernel32.dll", "int", "CloseHandle", "hwnd", $hMutex)

[/dev/null]

I tried to look at the source code (AutoHotKey is open source) but I couldn't find the killmutex function. I probably just don't know where to look.

But, the idea is, I get the source code in something like C or C++, and make it into a DLL so my autoit script can call it? So I should be asking for the source code for that function, right?

AutoHotkey is NOT HotkeyNet! You really have to ask in the HotkeyNet forum: http://www.hotkeynet.com/

Kurt

[lurikeen]

If you know the handle of mutex this shoud kill the mutex:

DllCall("kernel32.dll", "int", "ReleaseMutex", "hwnd", $hMutex)
DllCall("kernel32.dll", "int", "CloseHandle", "hwnd", $hMutex)

Ok, so my hwnd is "\BaseNamedObjects\DAoCi1"... but what would I put for the $hMutex? I only know how to multi thread with pthread libraries. I tried a value of 1 and it didn't work.

AutoHotkey is NOT HotkeyNet! You really have to ask in the HotkeyNet forum: http://www.hotkeynet.com/

Kurt

Good point. My mistake.

[Andreik]

Ok, so my hwnd is "\BaseNamedObjects\DAoCi1"... but what would I put for the $hMutex? I only know how to multi thread with pthread libraries. I tried a value of 1 and it didn't work.

Good point. My mistake.

I`m not familiar with HotkeyNet, I don't know what is \BaseNamedObjects\DAoCi1.

hwnd is type of variable $hMutex(handler for your mutex). I don't know how to get handler from this \BaseNamedObjects\DAoCi1.

[/dev/null]

Ok, so my hwnd is "\BaseNamedObjects\DAoCi1"... but what would I put for the $hMutex? I only know how to multi thread with pthread libraries. I tried a value of 1 and it didn't work.

Good point. My mistake.

take a look at _Singleton() in Misc.au3 (AutoIT include dir)... It uses CreateMutex() and contains everything you might need.

Kurt

[simon387]

I got the same OP problem, and im not able to use dlls so I don't understand the _singleton()'s code :\

[simon387]

iow:

goal: the possibility to run 2+ instances of the game.

By default, you can run only 2 instances, when trying to run the 3th, you get an error, there is a mutex somewhere:\

What I got for every instance: PID, winTitle, whandle;

how can I seek&destroy this mutex, or bypass it?

[simon387]

whit this code found on another thread I think I can kill a mutex... just need to find the name!

expandcollapse popup

#RequireAdmin
#include <WinAPI.au3>
HotKeySet("{ESC}", "_Escape"); ESC to exit
Global Const $MUTEX_ALL_ACCESS = 0x1F0001
Global $hMutexGlobal
$name = "???????????????????????????????????????????????????????????????"

While 1
    ConsoleWrite("Mutex Exists: " & (_MutexExists($name) = 1) & @CRLF)
    $hMutexGlobal = _MutexOpen($name)
    ConsoleWrite("Mutex Handle: " & $hMutexGlobal & @CRLF)

    If _ReleaseMutex($hMutexGlobal) = 1 Then
        MsgBox(0, '', "Mutex Released!" & @CRLF & "Mutex Exists: " & (_MutexExists($name) = 1))
    Else
        ConsoleWrite("Mutex Released: False" & @CRLF)
        ConsoleWrite("Mutex Exists: " & (_MutexExists($name) = 1) & @CRLF)
    EndIf
    Sleep(1000)
WEnd

Func _MutexOpen($szMutexName)

    Local $tSECURITY_ATTRIBUTES = DllStructCreate("dword Length;ptr SecurityDescriptor;int InheritHandle")
    DllStructSetData($tSECURITY_ATTRIBUTES, "Length", DllStructGetSize($tSECURITY_ATTRIBUTES))
    DllStructSetData($tSECURITY_ATTRIBUTES, "InheritHandle", 1); inherit the handle;<- THIS!!!
    Local $hMutex = DllCall("kernel32.dll", "hwnd", "CreateMutex","ptr", DllStructGetPtr($tSECURITY_ATTRIBUTES),"int", 1,"str", $szMutexName)
    If @error Or Not $hMutex[0] Then Return 0
    Return $hMutex[0]
EndFunc  ;==>_MutexOpen

Func _MutexOpen_($szMutexName)
    Local $hMutex = DllCall("kernel32.dll", "hwnd", "OpenMutex", "int", $MUTEX_ALL_ACCESS, "int", 0, "str", $szMutexName)
    If IsArray($hMutex) And $hMutex[0] Then Return $hMutex[0]
    Return 0
EndFunc  ;==>_MutexOpen_




Func _MutexExists($szMutexName)
    Local $hMutex = DllCall("Kernel32.dll", "hwnd", "OpenMutex", "int", 0x1F0001, "int", 1, "str", $szMutexName)
    Local $aGLE = DllCall("Kernel32.dll", "int", "GetLastError")
    If IsArray($hMutex) And $hMutex[0] Then
        DllCall("Kernel32.dll", "int", "CloseHandle", "hwnd", $hMutex[0])
    EndIf
    If IsArray($aGLE) And $aGLE[0] = 127 Then Return 1
    Return 0
EndFunc  ;==>_MutexExists

Func _ReleaseMutex($hMutex)
    Local $aRM = DllCall("kernel32.dll", "int", "ReleaseMutex", "hwnd", $hMutex)
    ConsoleWrite("!!!!" & _WinAPI_GetLastErrorMessage())
;ConsoleWrite("!!!!" & $aRM[0] & @CRLF)
    Local $aCH = DllCall("Kernel32.dll", "int", "CloseHandle", "hwnd", $hMutex)
    If (IsArray($aRM) And $aRM[0] > 0) And (IsArray($aCH) And $aCH[0] > 0) Then Return 1
    Return 0
EndFunc  ;==>_ReleaseMutex



Func _Escape()
    Exit
EndFunc  ;==>_Escape

Edited May 16, 2010 by simon387

[simon387]

no, the names are right, DAoCi1 & DAoCi2, just cant kill that mutex (but process explorer can!)

Edited May 16, 2010 by simon387

[simon387]

maybe I need to translate this in autoit

Private Sub CloseHandleEx(ByVal lPID As Long, ByVal lHandle As Long)
    Dim hProcess As Long
    hProcess = OpenProcess(PROCESS_ALL_ACCESS, 0, lPID)
    Call NtDuplicateObject(hProcess, lHandle, 0, ByVal 0, 0, 0, DUPLICATE_CLOSE_SOURCE)
    Call NtClose(hProcess)
End Sub

[simon387]

I need some help over here

[simon387]

its not forbidden by EULA/COC (macroing afk is), its just blocked cause its official unsupported

[JohnOne]

Its frowned upon to bump your threads within 24hrs which is what you are doing. And you are more likely to piss people off than get their help.

You can use the edit button to add information.

Best of luck.

EDIT: ok its not your thread, but same dance.

Edited May 17, 2010 by JohnOne

[simon387]

24h bump

[simon387]

so no one knows how to close an handle of a process mutant

[JohnOne]

Mate, I would try to help you out, but I dont even know what a mutex is, and the only mutant I know is snoring her head off in bed.

Care to post a link defining a mutex?

[simon387]

in this case is an OS object

http://en.wikipedia.org/wiki/Mutual_exclusion