[c/pthread]Thread's number id

[pistilloi]

È normale che il numero identificativo dei threads sia negativo?

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


void *thread_function();


int main() {


    pthread_t thread;
    
    if( 0 != pthread_create(&thread, NULL, thread_function, NULL) )
    {
        perror("impossible thread creation");
        exit(1);
    }


    pthread_join(thread, NULL);
    return 0;
}


void *thread_function() {
    
    printf("thread number = %ld\n", pthread_self());
}

$ cc -pthread athread.c$ ./a.out
thread number = -1218548928
$