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#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "litmus.h"
#define US_PER_MS 1000
#define NUMTASKS 4
int prefix(void)
{
char field[1024];
int prefix[1024];
int i, sum = 0;
for (i = 0; i < 1024; i++) {
sum += field[i];
prefix[i] = sum;
}
return sum;
}
void do_stuff(void)
{
int i =0, j =0;
for (; i < 50000; i++)
j += prefix();
}
#define CALL(sc) do { ret = sc; if (ret == -1) {perror(" (!!) " #sc " failed: "); /*exit(1)*/;}} while (0);
unsigned int job_no;
void next(void)
{
int ret;
unsigned int actual;
CALL(get_job_no(&actual));
CALL(wait_for_job_release(++job_no));
printf("Now executing job %u, waited for %u\n", actual, job_no);
}
void sync_jobs(void)
{
int ret;
unsigned int actual;
CALL(get_job_no(&actual));
job_no = actual;
}
int main(int argc, char** argv)
{
int ret;
init_litmus();
CALL(getpid());
printf("my pid is %d\n", ret);
CALL(get_job_no(&job_no));
printf("my job_no is %u", job_no);
next();
next();
next();
/* now overrun a job for good */
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
do_stuff();
next();
next();
next();
next();
sync_jobs();
next();
next();
next();
return 0;
}
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