WndProc overhead question ?

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Spidark

Joined: 11 May 2005
Posts: 39

Spidark 13 May 2005, 13:36

Hello 2 all.
Another newbie on the block.
I have seen a lot ways to implement your Wndproc function.
But i kinda a like the style below.
My question is does this create to much overhead ( is it bad coding this way ).
Because of the stack frame creation in every message call.
And aslo saving regs in each Message call

And how wil you do it (example please ).
Than you verry much.

Code:

WndProc:
        cmp     dword [esp+8],WM_DESTROY
        je      ON_DESTROY
        cmp     dword [esp+8],WM_CREATE
        je      ON_CREATE
        cmp     dword [esp+8],WM_TIMER
        je      ON_TIMER
        jmp     DEFWIN
        

proc    ON_DESTROY,hWnd,uMsg,wParam,lParam
        invoke   KillTimer,[hWnd],1
        invoke   PostQuitMessage,0
        return
endp

proc    ON_CREATE,hWnd,uMsg,wParam,lParam
        push    edi esi ebx
        invoke  SetTimer,[hWnd],1,2000,0
        pop     ebx esi edi

        return
endp

proc    ON_TIMER,hWnd,uMsg,wParam,lParam
        push    edi esi ebx
        invoke  SendMessage,[hWnd],WM_CLOSE,0,0
        pop     ebx esi edi
        return
endp
proc    DEFWIN,hWnd,uMsg,wParam,lParam
        push    edi esi ebx
        invoke    DefWindowProc,[hWnd],[uMsg],[wParam],[lParam]
        pop     ebx esi edi
        return
endp

13 May 2005, 13:36

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 13 May 2005, 15:05

a small optimization is "mov eax, [esp + parm_msg]", then do the CMPs against EAX. Other than that, it's an okay way of doing things. You can move the most often received messages to the top of the routine for a (mostly theoretical) speed increase.

13 May 2005, 15:05

Spidark

Joined: 11 May 2005
Posts: 39

Spidark 13 May 2005, 20:51

f0dder wrote:

a small optimization is "mov eax, [esp + parm_msg]", then do the CMPs against EAX. Other than that, it's an okay way of doing things. You can move the most often received messages to the top of the routine for a (mostly theoretical) speed increase.

Thanks i will optimize it.

13 May 2005, 20:51

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