The problem of passing integer parameters to the pthread_create() function

The problem of passing parameters to the pthread_create() function

According to my attempts, the thread function must pass in parameters when it is defined, and the fourth parameter can be filled with NULL when it is used.

void *func(void *t)
{
    printf("hello world!\n");
    //参数*t不使用
}
int main()
{
    pthread_t t;
    pthread_create(&t,NULL,func,NULL);
    //第四个参数不填
    pthread_join(t,NULL);
    return 0;
}

When passing in a specific integer value, there are two ways.

void *func(void *t)
{
    printf("This value is %d\n",*(int *)t);
}
int main()
{
    int value=5;
    pthread_t t;
    pthread_create(&t,NULL,func,&value);
    //将value的地址传过去.
    pthread_join(t,NULL);
    return 0;
}

This method has a drawback, because it is the incoming address, the t value in the thread function will be modified along with the value of value.
The second method:
The second method has been pondering for a long time, because it keeps reporting errors when compiling, and later I figured out the reason for the 64-bit machine.

#define TYPE32 int
#define TYPE64 long
void *func(void *t)
{
    printf("This value is %d\n",(TYPE64)(t));
    //需要根据机器的位数选择int还是long
    //不然编译的时候就会出现精度丢失的错误
}
int main()
{
    int value = 5;
    pthread_t t;
    pthread_create(&t,NULL,func,(void *)value);
    pthread_join(t,NULL);
    return 0;
}