Hi,
I'm having problems with pthreads on uClinux(kernel 2.6.x) + Nios2.
Sometimes it works, sometimes don't.
If I put usleep(); in my application, the system stops, and I have to
restart it.
When I try without usleep it run, but I have a unfair scheduler.
I had tried sched_yield(); but it don't work well.
Can someone help me with it? There is other functions that I can use or
other thread lib ?
There is other way that I can obtain concurrency in Nios2 + uClinux?
Regards,
Alexandre
Here is my source---------------------------
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <linux/sched.h>
#include <unistd.h>
void writer()
{
while(1)
{
printf("Writer!!!!\n");
//sched_yield();
usleep(1);
}
printf("Writer end!\n");
}
void reader()
{
while(1)
{
printf("Reader!!!!\n");
//sched_yield();
usleep(1);
}
printf("Reader end!\n");
}
int main() {
pthread_t thread;
int rc = pthread_create(&thread, NULL, (void *)writer, NULL);
if (rc){
printf("ERROR; [writer] return code from pthread_create() is %d\n",
rc);
exit(-1);
}
rc = pthread_create(&thread, NULL, (void *)reader, NULL);
if (rc){
printf("ERROR; [reader] return code from pthread_create() is %d\n",
rc);
exit(-1);
}
usleep(8000000);
//pthread_join(threads[0],NULL);
return 0;
}
----------------------------------------
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