set_sched__priority.cpp

#include <iostream>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <sched.h>
#include <errno.h>

int main()
{
  std::cout << "hello" << std::endl;

  //pthread_attr_t attr;
  //pthread_attr_init(&attr);
  //  const int result = pthread_attr_setschedpolicy(&attr, SCHED_FIFO);
  struct sched_param my_param;
  my_param.__sched_priority = 20;
  errno = 0;
  const int result = sched_setscheduler(0/*pid*/, SCHED_FIFO, &my_param); 
  if (result != 0)
  {
    perror("setting sched priority failed");
    exit(0);
  }

  clock_t start;
  start = clock();
  clock_t end = start + 10 * CLOCKS_PER_SEC;
  while(clock() < end)
  {
    int i = 0;
    while(i < 10000)
      ++i;
  }

  std::cout << "bye" << std::endl;



}