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Bug #1331 ยป readdir2.c

alexh, 04/23/2009 12:40 PM

 
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <unistd.h>

pthread_barrier_t bar;


void* tester(void *arg)
{
struct dirent *en;
DIR *d = opendir("/");

pthread_barrier_wait(&bar);

while ( (en = readdir(d)) != NULL )
{
if (errno != 0)
{
perror("thread tester error");
break;
}
}

if (!en)
{
if (errno != 0)
{
perror("thread tester error");

}
}
}

void* checker(void *arg)
{
pthread_barrier_wait(&bar);
printf("Passed barrier!\n");
}


int main(int argc, char *argv[])
{
int i, ret, nthreads;
pthread_t th;

if (argc <= 1)
{
printf("Need one argument\n");
exit(1);
}

nthreads = atoi(argv[1]);
printf("Trying with %d threads\n", nthreads);

if ( (ret = pthread_barrier_init(&bar, NULL, nthreads)) != 0)
{
printf("error occured during pthread_barrier_init, ret = %d\n", ret);
perror("Or: ");
exit(1);
}

printf("Creating checker thread\n");
pthread_create(&th, NULL, checker, NULL);

printf("Creating tester threads\n");


for (i = 0; i < nthreads; i++)
pthread_create(&th, NULL, tester, NULL);

for (;;)
{
sleep(1000);
}

return 0;
}
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