wiringPi_Blueberry/wiringPi/piHiPri.c

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2023-08-11 15:53:17 +08:00
/*
* piHiPri:
* Simple way to get your program running at high priority
* with realtime schedulling.
*
* Copyright (c) 2012 Gordon Henderson
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
*
* wiringPi is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* wiringPi is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with wiringPi.
* If not, see <http://www.gnu.org/licenses/>.
***********************************************************************
*/
#include <sched.h>
#include <string.h>
#include "wiringPi.h"
/*
* piHiPri:
* Attempt to set a high priority schedulling for the running program
*********************************************************************************
*/
int piHiPri (const int pri)
{
struct sched_param sched ;
memset (&sched, 0, sizeof(sched)) ;
if (pri > sched_get_priority_max (SCHED_RR))
sched.sched_priority = sched_get_priority_max (SCHED_RR) ;
else
sched.sched_priority = pri ;
return sched_setscheduler (0, SCHED_RR, &sched) ;
}