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/*-*- Mode: C; c-basic-offset: 8 -*-*/
#include <errno.h>
#include <string.h>
#include <sched.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "rtkit.h"
#ifndef SCHED_RESET_ON_FORK
#define SCHED_RESET_ON_FORK 0x40000000
#endif
static void print_status(const char *t) {
int ret;
if ((ret = sched_getscheduler(0)) < 0) {
fprintf(stderr, "sched_getscheduler() failed: %s\n", strerror(errno));
return;
}
printf("%s:\n"
"\tSCHED_RESET_ON_FORK: %s\n",
t,
(ret & SCHED_RESET_ON_FORK) ? "yes" : "no");
if ((ret & ~SCHED_RESET_ON_FORK) == SCHED_RR) {
struct sched_param param;
if (sched_getparam(0, ¶m) < 0) {
fprintf(stderr, "sched_getschedparam() failed: %s\n", strerror(errno));
return;
}
printf("\tSCHED_RR with priority %i\n", param.sched_priority);
} else if ((ret & ~SCHED_RESET_ON_FORK) == SCHED_OTHER) {
errno = 0;
ret = getpriority(PRIO_PROCESS, 0);
if (errno != 0) {
fprintf(stderr, "getpriority() failed: %s\n", strerror(errno));
return;
}
printf("\tSCHED_OTHER with nice level: %i\n", ret);
} else
fprintf(stderr, "Neither SCHED_RR nor SCHED_OTHER.\n");
}
int main(int argc, char *argv[]) {
DBusError error;
DBusConnection *bus;
int r;
dbus_error_init(&error);
if (!(bus = dbus_bus_get(DBUS_BUS_SYSTEM, &error))) {
fprintf(stderr, "Failed to connect to system bus: %s\n", error.message);
return 1;
}
print_status("before");
if ((r = rtkit_make_high_priority(bus, 0, -10)) < 0)
fprintf(stderr, "Failed to become high priority: %s\n", strerror(-r));
else
printf("Sucessfully became high priority.\n");
print_status("after high priority");
if ((r = rtkit_make_realtime(bus, 0, 10)) < 0)
fprintf(stderr, "Failed to become realtime: %s\n", strerror(-r));
else
printf("Sucessfully became realtime.\n");
print_status("after realtime");
dbus_connection_unref(bus);
return 0;
}
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