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include masm32rt.inc
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comment * -----------------------------------------------------
Build this template with
"CONSOLE ASSEMBLE AND LINK"
----------------------------------------------------- *
szDup proto :DWORD
.data
tststr db "This is a test!!",0
.code
start:
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call main
exit
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main proc
LOCAL txtbuffer :dword
mov txtbuffer, rv(szDup, addr tststr)
invoke szUpper, txtbuffer
print offset tststr,13,10
print txtbuffer,13,10
free txtbuffer ; macro
mov eax,input(13,10,"Press enter to exit...")
ret
main endp
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OPTION PROLOGUE:NONE
OPTION EPILOGUE:NONE
align 4
szDup proc src:DWORD
push esi
mov esi, [esp+2*4]
test esi, esi
jz @error ; no str
invoke szLen, esi
add eax, 1 ; +0 terminator
invoke GlobalAlloc, GMEM_FIXED or GMEM_ZEROINIT, eax
push eax ; store ptr
test eax, eax
jz @error ; no memory
invoke szCopy, esi, eax ; dupping
pop eax ; restore ptr
pop esi
ret 1*4
@error:
xor eax, eax
pop esi
ret 1*4
szDup endp
OPTION PROLOGUE:PrologueDef
OPTION EPILOGUE:EpilogueDef
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end start
denise,
It looks fine, should work OK and deallocates the memory correctly.
another question, hutch--
is necessary, for each use of the function, in this case szDup, to release the memory, or simply once when finishing?
example:
...
LOCAL ptrbuffer:DWORD
...
...
mov ptrbuffer,rv(szDup, addr txt1)
...
...
; is necesary free memory, for reuse ptrbuffer?
mov ptrbuffer,rv(szDup, addr txt2)
...
...
; is necesary free memory, for reuse ptrbuffer?
mov ptrbuffer,rv(szDup, addr txt3)
...
...
free ptrbuffer
ret
sorry for stupid question...
repeat 10000000
mov ptrbuffer,rv(szDup, addr txt1)
;free(ptrbuffer)
endm
with free commented, the program consumes too much memory
Denise,
With a single DWORD variable, just overwrite it with your new value.
The 10 million repeats of a single line of code is still a very large block of code so it is likely to lock up either MASM or if you can get it to build at all, the OS.
I understand to you, hutch--, the test repeat/endm was only to verify the memory that the program uses, does not to see the size of the program, I feel if I was not explained me with clarity. :red