> What is going on?
It's not exactly clear from your incomplete example. But if "tempBody" is of
type "myHeader", then you're copying "sizeof(myHeader) + 3" bytes of data into a
memory chunk that's "sizeof(myHeader) + 2" bytes long. Thus, you're overwriting
the end of the block, and possibly the lockcount information of the subsequent
block.
The Palm OS Emulator catches this kind of error...
-- Keith Rollin
-- Palm OS Emulator engineer
Craig Allan Jeffree <[EMAIL PROTECTED]> on 08/04/2000 12:53:12 AM
Please respond to "Palm Developer Forum" <[EMAIL PROTECTED]>
Sent by: Craig Allan Jeffree <[EMAIL PROTECTED]>
To: "Palm Developer Forum" <[EMAIL PROTECTED]>
cc: (Keith Rollin/US/PALM)
Subject: Wacky MemHandles
Hi all,
I am having difficulties with a few mem handles. I have declared them,
initialised them for the correct amount of memory. I then lock them.
They each are independant of one another. However, when I unlock them
after I have performed a couple of MemMoves into the memory space of the
MemHandles, it gives me a message of chunk underlocked.
I tested each of the memhandles to be non 0, and I tested each of the
pointers generated to be non 0. What is going on?
Thanks.
Here's a snippet of the code:
Frag32 = MemHandleNew((UInt32)(sizeof(myHeader) + 2));
tempBody.IP_Packet_ID = 2;
tempBody.Segment_ID = 1;
packet_type = IP_PACKET;
tempPtr = (UInt8 *)MemHandleLock(Frag32);
MemMove(tempPtr, &packet_type, 1);
MemMove(tempPtr+1, &tempBody, sizeof(tempBody));
MemMove(tempPtr + 1 + sizeof(tempBody), &Fragments3_2[0], 2); /*
UInt8 array declared earlier*/
MemHandleUnlock(Frag32);
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