source: tests/concurrency/pthread/pthread_demo_create_join.cfa@ 691a4b7

#include <fstream.hfa>
#include <thread.hfa>
/* test pthread create/join/exit */

size_t arr[20];

void* fetch(void* idx){
    size_t res = arr[(size_t)idx];
    pthread_exit((void*)res);
    sout | "it should not be here";
    exit(1);
    //return (void*)res;
}

void arr_init(){
    for (int i = 0; i < 20; i++){
        arr[i] = i;
    }
}

int main()
{
    pthread_t threads[20];
    arr_init();
    int status;
    for (size_t i = 0; i < 20; i++){
        status = pthread_create(&threads[i], NULL, fetch, (void*)i);
        if (status != 0) exit(1);
    }
    int res = 0;
    for (int i = 0; i < 20; i++){
        void* res_i = NULL;
        status = pthread_join(threads[i], &res_i);
        if (status != 0) exit(2);
        if (((size_t)res_i) != i) exit(3);
        res += (size_t)res_i;
    }
    sout | "final res is" | res;

    return 0;
}