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Generating unique random integers
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Laszlo



Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
PostPosted: Fri Jul 25, 2008 11:39 pm    Post subject: Reply with quote
ell wrote:
how I set the 'AND' of A and B to C ?
Setup C as shown for A, or B, with its buffer z. Replace the line
Code:
NumPut(NumGet(&x-1,A_Index,"UChar") & NumGet(&y-1,A_Index,"UChar"), &x-1, A_Index, "UChar")
with
Code:
NumPut(NumGet(&x-1,A_Index,"UChar") | NumGet(&y-1,A_Index,"UChar"), &z-1, A_Index, "UChar")
(The bitwise AND is ‘&’, replaced here with the bitwise OR: ‘|’, providing the union of the two bitmaps A and B in the bitmap C.)
ell wrote:
SET bitmap vars one to other… C := A
Replace the above line with
Code:
NumPut(NumGet(&x-1,A_Index,"UChar"), &z-1, A_Index, "UChar")
ell wrote:
on the 128mb bitmap var,
I can make same commands as you posted on your 'AND' example ?
what is the number I set as bitmap var capacity of 1GB ?
It should work with any size, up to 2GB. 32-bit Windows versions do not handle more. When the physical memory is exhausted, parts of the bitmap will be swapped to disk, which is very slow.
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rani



Joined: 18 Mar 2008
Posts: 95
PostPosted: Mon Sep 29, 2008 10:15 pm    Post subject: ntdll bitmaps Reply with quote
Hi Laslo

I checked in ahk and later in vb6 the ntdll bit search 'or' and 'and'
and itterate on or bits=1 in specififc ntdll
of course in ahk it was real slow.
but in VB6 I expected for much better response (immeditely)

if I want to use in my application hundreds( or even thousands)
of bitmap strings , using ntdll
how I can handle these bitmaps ?
putting all in memory in some pointer array ?

or is there some other technique to handle it ?
some internal 'database' or else ?

rgrds
rani
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Laszlo



Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
PostPosted: Mon Sep 29, 2008 10:47 pm    Post subject: Reply with quote
When you create the bitmaps, you have to give them a name (an AHK variable, which contains the bitmap structure) and reserve memory for the data (other AHK variables, with the necessary VarSetCapacity calls). These variables can be array elements:
Code:
Number_of_Bits = 66 ; whatever you need
Size_in_Bytes := ceil(Number_of_Bits/8)

Loop 999 {
   VarSetCapacity(Bitmap%A_Index%, 8, 0) ; Bitmap header always 8 bytes
   VarSetCapacity(Buffer%A_Index%, Size_in_Bytes, 0) ; Bitmap buffer
   DllCall("ntdll\RtlInitializeBitMap", UInt, &Bitmap%A_Index%, UInt, &Buffer%A_Index%, UInt, Number_of_Bits)
}


Edit: fixed typo

Last edited by Laszlo on Wed Oct 22, 2008 2:32 pm; edited 1 time in total
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rani



Joined: 18 Mar 2008
Posts: 95
PostPosted: Wed Oct 08, 2008 11:28 am    Post subject: ntdll instance Reply with quote
Hi Laso,

1.
I checked the array in VB6 , and it works.

2.
is it possible to make one instance of the array of bitmap strings (thousand's)
and in other tasks (PID threads) to get /set values to this array ?
to aviod loading all array in every task opened ?
how is the technique to do that ?
by COM/DCOM maybe ?
any code sample will help
3.
is it possible to make ahk script to wrap under COM object ?
so it will be treated ad activex dll ?

thanks
ran
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Laszlo



Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
PostPosted: Wed Oct 08, 2008 12:54 pm    Post subject: Reply with quote
look here
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rani



Joined: 18 Mar 2008
Posts: 95
PostPosted: Thu Oct 09, 2008 7:43 pm    Post subject: Reply with quote
Hi Laslo

I read your link but I could not connect how to use the ntdll functions
with the rea/write memory

ran
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rani



Joined: 18 Mar 2008
Posts: 95
PostPosted: Sat Oct 11, 2008 5:48 am    Post subject: Reply with quote
Hi Laslo

is it possible to wrap ahk script
as COM activex object ?
so other program can use it as DLL instance ?

rgrds
ran
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Laszlo



Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
PostPosted: Sat Oct 11, 2008 1:49 pm    Post subject: Reply with quote
Ask (PM) a COM expert, like Sean or Lexikos.
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rani



Joined: 18 Mar 2008
Posts: 95
PostPosted: Wed Oct 22, 2008 4:51 am    Post subject: Reply with quote
Hi Laszo

when I initialize the bitmap,
I want the max bits will be ,let say 500,000 or 1MB bits:
bits=500000
what is the number I set in the :
DllCall("ntdll\RtlInitializeBitMap"

it is in bits or bytes ? or k*32 ?
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Laszlo



Joined: 14 Feb 2005
Posts: 4078
Location: Pittsburgh
PostPosted: Wed Oct 22, 2008 2:33 pm    Post subject: Reply with quote
The last parameter is the number of bits.
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