#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
// link with -pthread
/* A simple program that creates and exits threads */
void *PrintHello(void *id){ // mark the function definition (only a single argument of type
void* and return void*)
printf("Thread %ld says Hello.\n", (long)id); // note the way it is casted to long
without being derefrenced
pthread_exit(NULL); // this implicity gets called on performing a return from the start
function (here PrintHello)
}
int main(int argc, char const *argv[])
{
pthread_t threads[5]; // note no strcut was used here [ can be used as any other
datatype; such a declaration is
// is provided in the header file ]
int i;
for(i=0;i<5;i++){
printf("In main, creating thread no: %d.\n",i);
if(pthread_create(&threads[i], NULL, PrintHello, (void*)i)!=0) // &i was not
used to get the pointer
printf("Some error occured during the creation of thread no %d.\n", i);
} // Also arrays and structures or anything
for that matter can be passed to pthread_create
pthread_exit(NULL);
return 0;
}
