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Moving memory query status code to use sysinfo() instead of /proc.

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This commit is contained in:
Sanel Zukan
2013-01-09 13:45:49 +00:00
parent e01506d58a
commit 465eb7dfe3
4 changed files with 25 additions and 51 deletions
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44
ede-panel/applets/mem-monitor/MemMonitor.cpp
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@@ -1,5 +1,7 @@
/* assume Linux here */
#include <sys/sysinfo.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
@@ -13,25 +15,10 @@ EDELIB_NS_USING(color_rgb_to_fltk)
#define UPDATE_INTERVAL 1.0f
#define STR_CMP(first, second, n) (strncmp(first, second, n) == 0)
static int height_from_perc(int perc, int h) {
inline int height_from_perc(int perc, int h) {
return (perc * h) / 100;
}
static long get_number(const char *ln) {
char *s = edelib_strndup(ln, 128);
int i = 1;
for(char *p = strtok(s, " "); p; p = strtok(NULL, " "), i++) {
if(i == 2) {
long ret = atol(p);
free(s);
return ret;
}
}
free(s);
return 0;
}
static void mem_timeout_cb(void *d) {
((MemMonitor*)d)->update_status();
Fl::repeat_timeout(UPDATE_INTERVAL, mem_timeout_cb, d);
@@ -42,25 +29,14 @@ MemMonitor::MemMonitor() : Fl_Box(0, 0, 45, 25), mem_usedp(0), swap_usedp(0) {
}
void MemMonitor::update_status(void) {
FILE *fd = fopen("/proc/meminfo", "r");
if(!fd) return;
struct sysinfo sys;
if(sysinfo(&sys) != 0) return;
long mem_total, mem_free, swap_total, swap_free;
mem_total = mem_free = swap_total = swap_free = 0;
static char buf[128];
while(fgets(buf, sizeof(buf), fd) != 0) {
if(STR_CMP(buf, "MemTotal:", 9))
mem_total = get_number(buf);
else if(STR_CMP(buf, "MemFree:", 8))
mem_free = get_number(buf);
else if(STR_CMP(buf, "SwapTotal:", 10))
swap_total = get_number(buf);
else if(STR_CMP(buf, "SwapFree:", 9))
swap_free = get_number(buf);
}
fclose(fd);
mem_total = (float)sys.totalram * (float)sys.mem_unit / 1048576.0f;
mem_free = (float)sys.freeram * (float)sys.mem_unit / 1048576.0f;
swap_total = (float)sys.totalswap * (float)sys.mem_unit / 1048576.0f;
swap_free = (float)sys.freeswap * (float)sys.mem_unit / 1048576.0f;
mem_usedp = 100 - (int)(((float)mem_free / (float)mem_total) * 100);
swap_usedp = 100 - (int)(((float)swap_free / (float)swap_total) * 100);