Free RAM and Free User Memory

[koayst]

I read this in the "Device Specification" from Forum Nokia. The URL is http://www.forum.nokia.com/main/1,6566,015,00.html.

For 7650:
* Heap Size -> Free RAM, up to 1.4 MB
* Shared Memory for Storage -> Free user memory, up to 4 MB

For 3650:
* Heap Size -> Free RAM, up to 1.4 MB
* Shared Memory for Storage -> Free user memory, up to 3.4 MB+MMC

Questions:
1. Is heap size (Free RAM) only available during program execution?

2. What is "Free User Memory"?

3. Assuming I have a MMC of 64MB installed in 3650, does it mean that the total size of all executables I can installed in 3650 is sum of (3.4MB + 64MB)?

4. And for 7650, total size of all executables in the device is only 4MB?

[maokkone]

Hello,

1. The memory for running processes (programs) is allocated from the heap memory.

2. User memory is the place for storing data like a hard disk on your PC.

3. Yes, but of course image, sound, message and other kind of files share the same space.

4. Same as previous

Best Regards,
Marko / Forum Nokia

[cs_lcmaa]

I would like to ask,
how could i find out the heap usage when the program is running? ( both the case of emulator and real device).

Thanks.

[maokkone]

Hi,

You can implement a simple application, which uses following code lines to determine the free RAM:

TMemoryInfoV1Buf info;
UserHal::MemoryInfo(info);
TInt freeMemory = info().iFreeRamInBytes;

Notice that available RAM in emulator is modifiable. It can be changed in "...\epoc32\data\epoc.ini".

Br,
Marko / Forum Nokia

[cs_lcmaa]

Really Thanks!!

[Juggle4Evr1]

Hi,

is it possible to get the free stack space?

BTW: I used HAL::Get(HALData::EMemoryRAMFree,val) for free memory.