// gcc  -g -O0 -o main ./tls_main.c -L. -lthreadfunc  -ldl -lpthread
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <stdint.h>
#include <unistd.h>


typedef void* (*thread_func_t)(void*);



int main() {
    pthread_t thread;

    void* handle;
    thread_func_t thread_func;

    handle = dlopen("./libthreadfunc.so", RTLD_LAZY);
    if (!handle) {
        fprintf(stderr, "Failed to load libthreadfunc.so: %s\n", dlerror());
        exit(EXIT_FAILURE);
    }

    dlerror();  
    thread_func = (thread_func_t)dlsym(handle, "thread_func");
    const char* dlsym_error = dlerror();
    if (dlsym_error) {
        fprintf(stderr, "Failed to find symbol thread_func: %s\n", dlsym_error);
        dlclose(handle);
        exit(EXIT_FAILURE);
    }

    while (1) {
            if (pthread_create(&thread, NULL, thread_func, NULL)!= 0) {
                perror("Failed to create thread");
                dlclose(handle);
                exit(EXIT_FAILURE);
            }
        sleep(1);
    }
    
    dlclose(handle);

    return 0;
}