Add OpenBSD RAM stats

diff --git a/components/ram.c b/components/ram.c
index a1fc3fe913b755bb7efbec971294466b75b14591..b2008823be926343b5a317549ed5164404e82f09 100644 (file)
--- a/components/ram.c
+++ b/components/ram.c
@@ -1,9 +1,9 @@
 /* See LICENSE file for copyright and license details. */
-#if defined(__linux__)
 #include <stdio.h>
 
 #include "../util.h"
 
+#if defined(__linux__)
 const char *
 ram_free(void)
 {
@@ -51,4 +51,78 @@ ram_used(void)
               bprintf("%f", (float)(total - free - buffers - cached) / 1024 / 1024) :
               NULL;
 }
+#elif defined(__OpenBSD__)
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+inline int
+load_uvmexp(struct uvmexp *uvmexp)
+{
+       int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
+       size_t size;
+
+       size = sizeof(*uvmexp);
+
+       return sysctl(uvmexp_mib, 2, uvmexp, &size, NULL, 0) >= 0 ? 1 : 0;
+}
+
+const char *
+ram_free(void)
+{
+       struct uvmexp uvmexp;
+       float free;
+       int free_pages;
+
+       if (load_uvmexp(&uvmexp)) {
+               free_pages = uvmexp.npages - uvmexp.active;
+               free = (double) (free_pages * uvmexp.pagesize) / 1024 / 1024 / 1024;
+               return bprintf("%f", free);
+       }
+
+       return NULL;
+}
+
+const char *
+ram_perc(void)
+{
+       struct uvmexp uvmexp;
+       int percent;
+
+       if (load_uvmexp(&uvmexp)) {
+               percent = uvmexp.active * 100 / uvmexp.npages;
+               return bprintf("%d", percent);
+       }
+
+       return NULL;
+}
+
+const char *
+ram_total(void)
+{
+       struct uvmexp uvmexp;
+       float total;
+
+       if (load_uvmexp(&uvmexp)) {
+               total = (double) (uvmexp.npages * uvmexp.pagesize) / 1024 / 1024 / 1024;
+               return bprintf("%f", total);
+       }
+
+       return NULL;
+}
+
+const char *
+ram_used(void)
+{
+       struct uvmexp uvmexp;
+       float used;
+
+       if (load_uvmexp(&uvmexp)) {
+               used = (double) (uvmexp.active * uvmexp.pagesize) / 1024 / 1024 / 1024;
+               return bprintf("%f", used);
+       }
+
+       return NULL;
+}
 #endif