pthread_detach.c

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

void *thread_main(void *arg) {
    for(int i=0; i<5; i++) {
        printf("Running time : %d\n", i+1);
        sleep(1);
    }

    printf("thread main exit\n");
    return NULL;
}

int main(int argc, char **argv) 
{
    pthread_t tid;
    pthread_attr_t attr;
    int state;

    if(pthread_attr_init(&attr) != 0) {
        return -1;
    }

    if(pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0) {
        return -1;
    }

    if(pthread_attr_getdetachstate(&attr, &state) != 0) {
        return -1;
    } 

    printf("pthread_attr_getdetachstate : %d\n", state);

    if(pthread_create(&tid, &attr, thread_main, NULL) != 0) {
        return -1;
    }

    if(pthread_attr_destroy(&attr) != 0) {
        return -1;
    }
    
    while(1) {
        sleep(1);
        printf("hello world\n");
    }

    return 0;
}

#if 0
pthread_attr_getdetachstate : 1
Running time : 1
hello world
Running time : 2
hello world
Running time : 3
hello world
Running time : 4
hello world
Running time : 5
hello world
thread main exit
hello world
hello world
hello world
#endif