Re: Allocate Static Memory?

"Bryan Parkoff" <nospam@[EMAIL PROTECTED]
> wrote in message 
news:481fc7cd$0$7692$4c368faf@[EMAIL PROTECTED]
>    I want to know how much static memory is limited before execution 
> program starts.  I would write a large array.  The large array has
65,536 
> elements.  The data size is double word.  The static memory would
allocate 
> 256K.  The 256K is a fixed memory size.  After the compiler has
completed 
> compiling header and source code, the execution program might fail to
run 
> or crash.  The operating system might do not display error message
saying, 
> "Insufficient memory."
>    The dynamic memory may be the option.  The malloc() function can test

> to determine if allocated memory is available at run-time.  Then, use
I/O 
> like fopen() and fclose() functions to read data from the hard drive and

> store it into RAM.  The error message can display at run-time if
malloc() 
> tests to tell insufficient memory.
>    Please give me your advice.  How much static memory can be limited 
> before execution program starts?

This is off-topic wrt your question, but you can build an allocator on a 
plurality of threads stack spaces... I did a memory allocation scheme in
an 
environment that did not have a heap. IIRC, the OS was an older version of

Quadros on ARM9. No, heap, but each Quadros Task had stack space. So, I 
built the heap on a per-thread/task allocation algorithm. Something like:

http://groups.google.com/group/comp.arch/browse_frm/thread/6dc825ec9999d3a8

But it used bin-sema for locks instead of atomic operations. The only
atomic 
operation available on the ARM9 is a SWP instruction. I also used some
stack 
space for a globally shared heap. The entire allocation system was based
on 
task stacks.