I get an error message indicating that I am reading from an unlocked chunk
of memory. The memory chunk in question (trough pointer variable 'value')
is however not unlocked by me, and I can't really figure out if it does get
unlocked by itself somehow, or if there is something else wrong.
I am assuming that it is the variable 'value' that is the problem since I
am writing to 'p'. But of course 'p' is also locked by me and not unlocked.
The errormessage below is presented when executing row no:
30 DmWrite(p, 0, (UInt32*)StrAToI(value), sizeof(UInt32));
Grateful for any ideas?
- Veronica Loell
Error message:
---------------
pavotid palm (unknown version) just read from memory location 0x00002714,
which is in an unlocked chunk of memory.
An "unlocked chunk of memory" is one that has been allocated with MemHandleNew
but that has not been locked with MemHandleLock. Such an access usually means
that an application allocated a buffer with MemHandleNew, locked it with
MemHandleLock, unlocked it with MemHandleUnlock, and then used the pointer
that was returned by MemHandleLock.
---------------
1Err parseEss( Int16 start, Int16 end, Char *str )
2{
3 UInt16 ix,s1,s2,size;
4 UInt32 snr;
5 Char *value,*v2, *strK, *t1,*t2;
6 Err error;
7 MemHandle h, tempH,tempH2;
8 MemPtr p;
9 ix = DmNumRecords(gtblEssar);
10 HostTraceOutputTL(appErrorClass,
"*fcall*xmlFunctions.c:parseEss(start=%hd,end=%hd, str=%s)",start,end,str);
11 h = DmNewRecord(gtblEssar, &ix, sizeof(ppavotidRecEssarType));
12 if (h) {
13 p = MemHandleLock(h);
14
15 t1 = (Char*)"<s>";
16 t2 = (Char*)"</s>";
17 s1 = (UInt16)(StrStr(str, t1 )- str + StrLen(t1));
18 s2 = (UInt16)(StrStr((str+s1), t2 )- str - 1);
19 size =(UInt16)(s2-s1+2);
20 HostTraceOutputTL(appErrorClass, "ppavotidGetInfo:s1=%hu, s2=%hu,
size=%hu",s1,s2,size);
21 tempH = MemHandleNew(sizeof(Char)*(size+1));
22 if (tempH){
23 value = (Char*)MemHandleLock(tempH);
24 if (size>0)
25 {
26 value = StrNCopy(value, (str+s1), size);
27 value[size-1] = chrNull;
28 snr = (UInt32)StrAToI(value);
29 HostTraceOutputTL(appErrorClass, "<s>=%lu", snr);
30 DmWrite(p, 0, (UInt32*)StrAToI(value), sizeof(UInt32));
31 HostTraceOutputTL(appErrorClass, "skrivit till post");
32 MemHandleFree(tempH);
33 }
34 }
..
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