components/OpenBSD/ram.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdio.h>
   3 #include <sys/types.h>
   4 #include <sys/sysctl.h>
   5 #include <stdlib.h>
   6 #include <unistd.h>
   7
   8 #include "../../util.h"
   9
  10 inline int
  11 load_uvmexp(struct uvmexp *uvmexp)
  12 {
  13         int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
  14         size_t size;
  15
  16         size = sizeof(*uvmexp);
  17
  18         return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
  19 }
  20
  21 const char *
  22 ram_free(void)
  23 {
  24         struct uvmexp uvmexp;
  25         float free;
  26         int free_pages;
  27
  28         if (load_uvmexp(&uvmexp)) {
  29                 free_pages = uvmexp.npages - uvmexp.active;
  30                 free = (double) (free_pages * uvmexp.pagesize) / 1024 / 1024 / 1024;
  31                 return bprintf("%f", free);
  32         }
  33
  34         return NULL;
  35 }
  36
  37 const char *
  38 ram_perc(void)
  39 {
  40         struct uvmexp uvmexp;
  41         int percent;
  42
  43         if (load_uvmexp(&uvmexp)) {
  44                 percent = uvmexp.active * 100 / uvmexp.npages;
  45                 return bprintf("%d", percent);
  46         }
  47
  48         return NULL;
  49 }
  50
  51 const char *
  52 ram_total(void)
  53 {
  54         struct uvmexp uvmexp;
  55         float total;
  56
  57         if (load_uvmexp(&uvmexp)) {
  58                 total = (double) (uvmexp.npages * uvmexp.pagesize) / 1024 / 1024 / 1024;
  59                 return bprintf("%f", total);
  60         }
  61
  62         return NULL;
  63 }
  64
  65 const char *
  66 ram_used(void)
  67 {
  68         struct uvmexp uvmexp;
  69         float used;
  70
  71         if (load_uvmexp(&uvmexp)) {
  72                 used = (double) (uvmexp.active * uvmexp.pagesize) / 1024 / 1024 / 1024;
  73                 return bprintf("%f", used);
  74         }
  75
  76         return NULL;
  77 }