5.1.0版本中rt_err_t rt_sem_delete(rt_sem_t sem)似乎没有释放sem本身的内存

发布于 2025-01-22 17:11:40 浏览：165 订阅该版

5.1.0版本中rt_err_t rt_sem_delete(rt_sem_t sem)似乎没有释放sem本身的内存：

```c
rt_err_t rt_sem_delete(rt_sem_t sem)
{
    rt_ubase_t level;

/* parameter check */
    RT_ASSERT(sem != RT_NULL);
    RT_ASSERT(rt_object_get_type(&sem->parent.parent) == RT_Object_Class_Semaphore);
    RT_ASSERT(rt_object_is_systemobject(&sem->parent.parent) == RT_FALSE);

RT_DEBUG_NOT_IN_INTERRUPT;

level = rt_spin_lock_irqsave(&(sem->spinlock));
    /* wakeup all suspended threads */
    rt_susp_list_resume_all(&(sem->parent.suspend_thread), RT_ERROR);
    rt_spin_unlock_irqrestore(&(sem->spinlock), level);

/* delete semaphore object */
    rt_object_delete(&(sem->parent.parent));

return RT_EOK;
}
```

发现此问题是在at_socket.c中的`static int free_socket(struct at_socket *sock)`中，按照此函数释放SOCKET后，再重新创建新SOCKET后，发现在堆中仍旧有残留的SOCKET相关的信号量，如下：

```
msh />list sem
semaphore            v   suspend thread
-------------------- --- --------------
at_skt4              000 1:net_rx
at_skt3              000 0
at_skt2              000 0
at_skt1              000 0
at_skt0              000 0
at_cr0               000 0
at_cs0               000 1:at_clnt0
sem_net_tx_rb        001 0
sem_net_tx           000 1:net_tx
sem_net_rx           000 0
shrx                 000 0
stimer               000 1:timer
msh />
```