how much memory left

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2 total messages Started by Netherwood P J Mon, 11 Mar 1991 14:24

#1486

Author: Netherwood P J
Date: Mon, 11 Mar 1991 14:24

13 lines
1142 bytes

Does anyone know of a method of determining how much memory you have
left after a series of calls to malloc in 3L's Parallel C ?

-------------------------------------------------------------------------------
Paul Netherwood                      janet    :  P.J.Netherwood@uk.ac.kingston
Research                             internet :  P.J.Netherwood@kingston.ac.uk
                                     phone    :  (+44) 81 549 1366 ext 2923    
                                     local    :  cs_s424@ux.king  
          
School of Computer Science and Electronic Systems,
|/ingston |>olytechnic, Penrhyn Road, Kingston-upon-Thames, Surrey KT1 2EE, UK.
|\--------|--------------------------------------------------------------------
  \

Re: how much memory left

#1496

Author: Mitsunori Kawabe
Date: Wed, 13 Mar 1991 02:08

20 lines
1253 bytes

In article <9103111424.aa27802@sappho.ux.King.AC.UK> cs_s424@ux.kingston.ac.uk (Netherwood P J) writes:

 |Does anyone know of a method of determining how much memory you have
 |left after a series of calls to malloc in 3L's Parallel C ?

How about use undocumented global variable "IMP___HEAP_LIMIT".
It points top of heap. So you can estimate free memory left by subtracting
this value from current stack address like following.

int free_mem()
{
  extern char *IMP___HEAP_LIMIT;
  char tmp;
  return &tmp - IMP___HEAP_LIMIT;
}

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