#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>
#define NUM_THREADS 8
void *PrintHello(void *args)
{
int thread_arg;
sleep(1);
thread_arg = (int)(*((int*)args));
printf("Hello from thread %d\n", thread_arg);
return NULL;
}
int main(void)
{
int rc,t;
pthread_t thread[NUM_THREADS];
for( t = 0; t < NUM_THREADS; t++)
{
printf("Creating thread %d\n", t);
rc = pthread_create(&thread[t], NULL, PrintHello, &t);
if (rc)
{
printf("ERROR; return code is %d\n", rc);
return EXIT_FAILURE;
}
}
sleep(5);
for( t = 0; t < NUM_THREADS; t++)
pthread_join(thread[t], NULL);
return EXIT_SUCCESS;
}
--------------------------------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <unistd.h>
#define NUM_THREADS 8
void *PrintHello(void *args)
{
int thread_arg;
int *p=NULL;
sleep(1);
// thread_arg = (int)(*((int*)args));
p = *(int*)args;
// p = *((int*)args)
thread_arg = (int)p;
printf("Hello from thread %d\n", thread_arg);
return NULL;
}
int main(void)
{
int rc,t;
pthread_t thread[NUM_THREADS];
for( t = 0; t < NUM_THREADS; t++)
{
printf("Creating thread %d\n", t);
rc = pthread_create(&thread[t], NULL, PrintHello, &t);
if (rc)
{
printf("ERROR; return code is %d\n", rc);
return EXIT_FAILURE;
}
}
sleep(5);
for( t = 0; t < NUM_THREADS; t++)
pthread_join(thread[t], NULL);
return EXIT_SUCCESS;
}