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9750a3d731
Granted, this style is definitely not common, but for the short utility-functions of this program it's just the right choice. This provides great flexibility, such that in the long run, it will be possible to also share code between the OS-implementations. This also keeps the state-keeping at a minimum and makes it clearer which functions are implemented on which OS without having to jiggle around with too many files in the process.
93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include "../util.h"
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#if defined(__linux__)
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const char *
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cpu_freq(void)
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{
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int freq;
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return (pscanf("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq",
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"%i", &freq) == 1) ?
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bprintf("%d", (freq + 500) / 1000) : NULL;
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}
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const char *
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cpu_perc(void)
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{
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int perc;
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static long double a[7];
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static int valid;
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long double b[7];
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memcpy(b, a, sizeof(b));
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if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
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&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6]) != 7) {
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return NULL;
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}
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if (!valid) {
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valid = 1;
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return NULL;
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}
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perc = 100 *
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((b[0]+b[1]+b[2]+b[5]+b[6]) -
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(a[0]+a[1]+a[2]+a[5]+a[6])) /
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((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) -
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(a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
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return bprintf("%d", perc);
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}
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const char *
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cpu_iowait(void)
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{
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int perc;
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static int valid;
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static long double a[7];
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long double b[7];
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memcpy(b, a, sizeof(b));
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if (pscanf("/proc/stat", "%*s %Lf %Lf %Lf %Lf %Lf %Lf %Lf",
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&a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6]) != 7) {
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return NULL;
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}
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if (!valid) {
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valid = 1;
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return NULL;
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}
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perc = 100 * ((b[4]) - (a[4])) /
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((b[0]+b[1]+b[2]+b[3]+b[4]+b[5]+b[6]) -
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(a[0]+a[1]+a[2]+a[3]+a[4]+a[5]+a[6]));
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return bprintf("%d", perc);
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}
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#elif defined(__OpenBSD__)
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#include <sys/sysctl.h>
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const char *
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cpu_freq(void)
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{
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int freq, mib[2];
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size_t size;
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mib[0] = CTL_HW;
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mib[1] = HW_CPUSPEED;
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size = sizeof(freq);
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if (sysctl(mib, 2, &freq, &size, NULL, 0) == -1) {
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fprintf(stderr, "sysctl 'HW_CPUSPEED': %s\n",
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strerror(errno));
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return NULL;
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}
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return bprintf("%d", freq);
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}
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#endif
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