components/ram.c
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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include "../util.h"
#if defined(__linux__)
const char *
ram_free(void)
{
long free;
return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ?
bprintf("%f", (float)free / 1024 / 1024) : NULL;
}
const char *
ram_perc(void)
{
long total, free, buffers, cached;
return (pscanf("/proc/meminfo",
"MemTotal: %ld kB\n"
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\nBuffers: %ld kB\n"
"Cached: %ld kB\n",
&total, &free, &buffers, &buffers, &cached) == 5) ?
bprintf("%d", 100 * ((total - free) - (buffers + cached)) /
total) :
NULL;
}
const char *
ram_total(void)
{
long total;
return (pscanf("/proc/meminfo", "MemTotal: %ld kB\n", &total) == 1) ?
bprintf("%f", (float)total / 1024 / 1024) : NULL;
}
const char *
ram_used(void)
{
long total, free, buffers, cached;
return (pscanf("/proc/meminfo",
"MemTotal: %ld kB\n"
"MemFree: %ld kB\n"
"MemAvailable: %ld kB\nBuffers: %ld kB\n"
"Cached: %ld kB\n",
&total, &free, &buffers, &buffers, &cached) == 5) ?
bprintf("%f", (float)(total - free - buffers - cached) /
1024 / 1024) :
NULL;
}
#elif defined(__OpenBSD__)
#include <stdlib.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <unistd.h>
#define LOG1024 10
#define pagetok(size, pageshift) ((size) << (pageshift - LOG1024))
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 = (float)(pagetok(free_pages, uvmexp.pageshift)) / 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 = (float)(pagetok(uvmexp.npages, uvmexp.pageshift)) / 1024 / 1024;
return bprintf("%f", total);
}
return NULL;
}
const char *
ram_used(void)
{
struct uvmexp uvmexp;
float used;
if (load_uvmexp(&uvmexp)) {
used = (float)(pagetok(uvmexp.active, uvmexp.pageshift)) / 1024 / 1024;
return bprintf("%f", used);
}
return NULL;
}
#endif