void
get_lim_data ()
{
_go32_dpmi_meminfo info;
unsigned long lim1, lim2;
_go32_dpmi_get_free_memory_information (&info);
/* DPMI server of Windows NT and its descendants reports in
info.available_memory a much lower amount that is really
available, which causes bogus "past 95% of memory limit"
warnings. Try to overcome that via circumstantial evidence. */
lim1 = info.available_memory;
lim2 = info.available_physical_pages;
/* DPMI Spec: "Fields that are unavailable will hold -1." */
if ((long)lim1 == -1L)
lim1 = 0;
if ((long)lim2 == -1L)
lim2 = 0;
else
lim2 *= 4096;
/* Surely, the available memory is at least what we have physically
available, right? */
if (lim1 >= lim2)
lim_data = lim1;
else
lim_data = lim2;
/* Don't believe they will give us more that 0.5 GB. */
if (lim_data > 512U * 1024U * 1024U)
lim_data = 512U * 1024U * 1024U;
}
u_long _go32_dpmi_remaining_physical_memory()
{
_go32_dpmi_meminfo info;
_go32_dpmi_get_free_memory_information(&info);
if (info.available_physical_pages)
return info.available_physical_pages * 4096;
return info.available_memory;
}
static int Sys_Get_Physical_Memory(void) /* FS: From DJGPP tutorial */
{
_go32_dpmi_meminfo meminfo;
_go32_dpmi_get_free_memory_information(&meminfo);
if (meminfo.available_physical_pages != -1)
return meminfo.available_physical_pages * 4096;
return meminfo.available_memory;
}
u_long _go32_dpmi_remaining_virtual_memory()
{
_go32_dpmi_meminfo info;
_go32_dpmi_get_free_memory_information(&info);
return info.available_memory;
}
