Function omAllocFromSystem

omalloc/omAllocSystem.c:194–243

* * System-level Alloc/Free * *******************************************************************/

 *
 *******************************************************************/
void* omAllocFromSystem(size_t size)
{
  void* ptr;

  ptr = OM_MALLOC_FROM_SYSTEM(size);
  if (ptr == NULL)
  {
    OM_MEMORY_LOW_HOOK();
    ptr = OM_MALLOC_FROM_SYSTEM(size);
    if (ptr == NULL)
    {
      OM_OUT_OF_MEMORY_HOOK();
      exit(1);
    }
  }
#if defined(HAVE_MALLOC_SIZE) || defined(HAVE_MALLOC_USABLE_SIZE)
  size=_omSizeOfLargeAddr(ptr);
#else
  size=omSizeOfAddr(ptr);
#endif
#ifndef OM_NDEBUG
  if (((unsigned long) ptr) + size > om_MaxAddr)
    om_MaxAddr = ((unsigned long) ptr) + size;
  if (((unsigned long) ptr) < om_MinAddr)
    om_MinAddr = ((unsigned long) ptr);
#endif

  om_Info.CurrentBytesFromMalloc += size;
  if (om_Info.CurrentBytesFromMalloc > om_Info.MaxBytesFromMalloc)
  {
    om_Info.MaxBytesFromMalloc = om_Info.CurrentBytesFromMalloc;
#if defined(OM_HAVE_VALLOC_MMAP) && defined(OM_MALLOC_MAX_BYTES_SYSTEM)
    if (om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM > om_Info.MaxBytesSystem)
      om_Info.MaxBytesSystem = om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM;
#endif
#if defined(HAVE_SBRK) && !defined(OM_MALLOC_MAX_BYTES_SBRK)
    if (! om_SbrkInit) om_SbrkInit = (unsigned long) sbrk(0) - size;
    if (om_Info.MaxBytesFromMalloc
#ifndef OM_HAVE_VALLOC_MMAP
        + om_Info.CurrentBytesFromValloc
#endif
        > om_Info.MaxBytesSbrk)
    {
      om_Info.MaxBytesSbrk = (unsigned long) sbrk(0) - om_SbrkInit;
    }
#endif
  }
  OM_MALLOC_HOOK(size);
  return ptr;
}

void* omReallocFromSystem(void* addr, size_t newsize)
{