条件变脸pthread_cond_signal丢失问题

static bsem_t bsem;
void* t1(void *arg)
{
    /*printf("enter task 1\n");*/
    /*while(1)*/
    /*{*/
        /*sleep(2);*/
        bsem_post(&bsem);
        /*bsem_post_all(&bsem);*/
        /*printf("this is task1, post sem\n");*/

}

void* t2(void *arg)
{
    /*printf("enter task 2\n");*/
    while(1)
    {
        /*usleep(100000);*/
        bsem_wait(&bsem);
        printf("this thread[%u],is wait task2\n", pthread_self());
    }
}

int main()
{
    printf("enter main .... \n");
    int ret = 0;
    bsem_init(&bsem, 0);
    pthread_t thread1[2];
    pthread_t thread2[5];

    int i;
    for(i=0; i< 2; i++)
    {
        ret = pthread_create(&thread2[i], NULL,(void*)t2, NULL);
        if(ret!=0)
        {
             printf("pthread create fail");
        }
    }

    /*sleep(1);*/
    /*for(i=0; i< 2; i++)*/
    /*{*/
        ret = pthread_create(&thread1[0], NULL,(void*)t1, NULL);
        if(ret!=0)
        {
             printf("pthread create fail");
        }
    /*}*/
        /*sleep(1);*/
        ret = pthread_create(&thread1[0], NULL,(void*)t1, NULL);

    while(1);

    return 0;
}