Chcel by som sa opýtať či by mi nevedel niekto pomôcť s týmto kódom, potrebujem tam pridať minimálne 5 vlákien kde napríklad prvých 100 prvocisel bude počítať jedno vlákno, dalších 100 prvočísel druhé vlákno, dalsich 100 prvočisel tretie vlákno... atď. Ďakujem za pomoc.
Kód:
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
void *runner(void *param); /* the thread */
int main(int argc, char *argv[]) {
//Verify two args were passed in
if(argc < 2) {
fprintf(stderr, "USAGE: ./prime.out <Integer value>\n");
exit(1);
}
//verify the input is greater then or equal to two
if(atoi(argv[1]) < 2) {
fprintf(stderr, "USAGE: %d must be >= 2\n", atoi(argv[1]));
exit(1);
}
pthread_t tid; //Thread ID
pthread_attr_t attr; //Set of thread attributes
printf("Prime Numbers: ");
//Get the default attributes
pthread_attr_init(&attr);
//Create the thread
pthread_create(&tid,&attr,runner,argv[1]);
//Wait for the thread to exit
pthread_join(tid,NULL);
printf("\nComplete\n");
}
//The thread will begin control in this function
void *runner(void *param) {
int i,j,upper = atoi(param);
/* Check to see if a number is prime */
for(i = 2; i < upper; i++) {
int trap = 0;
/* Check each number for divisibility */
for(j = 2; j < i; j++) {
int result = i % j;
/* If any of the numbers divide cleanly
then this number is not prime. So
stop checking. */
if(result == 0) {
trap = 1;
break;
}
}
//No numbers divided cleanly so this number must be prime
if(trap == 0) {
printf("[%d] ", i);
}
}
//Exit the thread
pthread_exit(0);
}
