S01_WATKI_06

/*
Zademonstruj działanie funkcji sigwait()
*/

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include <signal.h>
#include <unistd.h>

void *thread_function(void *p)
{
    static sigset_t set;
    int sig;

    printf("Oczekiwanie na sygnal: \n");

    sigemptyset(&set);
    if(sigaddset(&set, SIGUSR1) == -1){
        perror("sigaddset");
        return (void *)EXIT_FAILURE;
    }

    if(sigwait(&set, &sig) != SIGUSR1){
        perror("sigwait");
        return (void *)EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}

int main(void)
{
    pthread_t thread;

    pthread_create(&thread, NULL, thread_function, (void *)NULL);

    sleep(2);

    pthread_kill(thread, SIGUSR1);
    pthread_join(thread, NULL);

    return EXIT_SUCCESS;
}