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57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
/*
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* f32x/rt.c - Enable/disable real-time scheduling priority
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*
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* Written 2008 by Werner Almesberger
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* Copyright 2008 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* The full ritual would also include mlock'ing, but we skip that.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <sched.h>
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static void realtimize(void)
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{
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struct sched_param prm;
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prm.sched_priority = sched_get_priority_max(SCHED_FIFO);
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if (prm.sched_priority < 0) {
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perror("sched_get_priority_max SCHED_FIFO");
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exit(1);
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}
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if (sched_setscheduler(0, SCHED_FIFO, &prm) < 0) {
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perror("sched_setscheduler SCHED_FIFO");
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exit(1);
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}
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}
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static void unrealtime(void)
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{
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struct sched_param prm = { .sched_priority = 0 };
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if (sched_setscheduler(0, SCHED_OTHER, &prm) < 0) {
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perror("sched_setscheduler SCHED_OTHER");
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exit(1);
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}
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}
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void rt(int on)
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{
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if (on)
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realtimize();
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else
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unrealtime();
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}
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