On Fri, Apr 26, 2002 at 08:55:48PM -0400, Ted Lowery wrote:
>palm-dev-forum-
>
>Yes, I know *exactly* how much space I will need.
>
>I could do as you suggest, but that is more work that isn't necessary
>since 1) my app is a limited to a specific use, not general use, and
>2) i don't yield to other processes during the data gathering, so
>nothing else can chew up the memory.
>
>So again I'll ask,
>
>What is the proper way to find the storage heap on a particular card?
>ie, differentiate the storage heap from the dynamic heap and the rom
>heaps?
>
>Thanks again for any help.
>
>Cheers, Ted
I'm not entirely sure if it's correct, but this is a function I wrote to
calculate the available space in the storage heap. It's worked for me well so
far, though if anybody sees a problem, please make it known. Hope it helps.
/*
* This function calculates the amount of free space in the storage heap.
* Because of changes in the Palm OS memory architecture, there is no single
* function that will work for all versions of the OS. Pretty lame.
*
* The 0x0001 in the if statement is the heap read-only flag mask.
*/
UInt32
MemoryStorageHeapFreeBytes(void)
{
UInt16 numCards;
UInt16 numHeaps;
UInt16 i;
UInt16 j;
UInt16 id;
UInt32 curSize;
UInt32 maxFree;
UInt32 totalFree = 0;
numCards = MemNumCards();
for (j = 0; j < numCards; j++)
{
numHeaps = MemNumRAMHeaps(j);
for (i = 0; i < numHeaps; i++)
{
id = MemHeapID(j, i);
if (!(MemHeapFlags(id) & 0x0001) && !MemHeapDynamic(id))
{
MemHeapFreeBytes(id, &curSize, &maxFree);
totalFree += curSize;
}
}
}
return totalFree;
}
--
--John Gruenenfelder Research Assistant, Steward Observatory, U of Arizona
[EMAIL PROTECTED]
"This is the most fun I've had without being drenched in the blood
of my enemies!"
--Sam of Sam & Max
--
For information on using the Palm Developer Forums, or to unsubscribe, please see
http://www.palmos.com/dev/support/forums/
