/* 线程1入口 */
static void thread1_entry(void* parameter)
{
int i;
char *block;
while(1)
{
for (i = 0; i < 48; i++)
{
/* 申请内存块 */
rt_kprintf("allocate No.%d\n", i);
if (ptr[i] == RT_NULL)
{
ptr[i] = rt_mp_alloc(&mp, RT_WAITING_FOREVER);
}
}
/* 继续申请一个内存块，因为已经没有内存块，线程应该被挂起 */
block = rt_mp_alloc(&mp, RT_WAITING_FOREVER);
rt_kprintf("allocate the block mem\n");
/* 释放这个内存块 */
rt_mp_free(block);
block = RT_NULL;
}
}
void rt_thread_free_sig(rt_thread_t tid)
{
rt_base_t level;
struct siginfo_node *si_list;
rt_sighandler_t *sig_vectors;
level = rt_hw_interrupt_disable();
si_list = (struct siginfo_node*)tid->si_list;
tid->si_list = RT_NULL;
sig_vectors = tid->sig_vectors;
tid->sig_vectors = RT_NULL;
rt_hw_interrupt_enable(level);
if (si_list)
{
struct rt_slist_node *node;
struct siginfo_node *si_node;
dbg_log(DBG_LOG, "free signal info list\n");
node = &(si_list->list);
do {
si_node = rt_slist_entry(node, struct siginfo_node, list);
rt_mp_free(si_node);
node = node->next;
} while (node);
}
if (sig_vectors)
{
RT_KERNEL_FREE(sig_vectors);
}
}
/*
* ISR for DMA mode Tx
*/
void rt_hw_serial_dma_tx_isr(rt_device_t device)
{
rt_uint32_t level;
struct stm32_serial_data_node* data_node;
struct stm32_serial_device* uart = (struct stm32_serial_device*) device->user_data;
/* DMA mode receive */
RT_ASSERT(device->flag & RT_DEVICE_FLAG_DMA_TX);
/* get the first data node */
data_node = uart->dma_tx->list_head;
RT_ASSERT(data_node != RT_NULL);
/* invoke call to notify tx complete */
if (device->tx_complete != RT_NULL)
device->tx_complete(device, data_node->data_ptr);
/* disable interrupt */
level = rt_hw_interrupt_disable();
/* remove list head */
uart->dma_tx->list_head = data_node->next;
if (uart->dma_tx->list_head == RT_NULL) /* data link empty */
uart->dma_tx->list_tail = RT_NULL;
/* enable interrupt */
rt_hw_interrupt_enable(level);
/* release data node memory */
rt_mp_free(data_node);
if (uart->dma_tx->list_head != RT_NULL)
{
/* transmit next data node */
rt_serial_enable_dma(uart->dma_tx->dma_channel,
(rt_uint32_t)uart->dma_tx->list_head->data_ptr,
uart->dma_tx->list_head->data_size);
}
else
{
/* no data to be transmitted, disable DMA */
DMA_Cmd(uart->dma_tx->dma_channel, DISABLE);
}
}
void rt_thread_handle_sig(rt_bool_t clean_state)
{
rt_base_t level;
rt_thread_t tid = rt_thread_self();
struct siginfo_node *si_node;
level = rt_hw_interrupt_disable();
while (tid->sig_pending & tid->sig_mask)
{
int signo, error;
rt_sighandler_t handler;
si_node = (struct siginfo_node *)tid->si_list;
if (!si_node) break;
/* remove this sig info node from list */
if (si_node->list.next == RT_NULL)
tid->si_list = RT_NULL;
else
tid->si_list = (void*)rt_slist_entry(si_node->list.next, struct siginfo_node, list);
signo = si_node->si.si_signo;
handler = tid->sig_vectors[signo];
rt_hw_interrupt_enable(level);
dbg_log(DBG_LOG, "handle signal: %d, handler 0x%08x\n", signo, handler);
if (handler) handler(signo);
level = rt_hw_interrupt_disable();
tid->sig_pending &= ~sig_mask(signo);
error = si_node->si.si_errno;
rt_mp_free(si_node); /* release this siginfo node */
/* set errno in thread tcb */
tid->error = error;
}
/* whether clean signal status */
if (clean_state == RT_TRUE) tid->stat &= ~RT_THREAD_STAT_SIGNAL;
rt_hw_interrupt_enable(level);
}
/* 线程2入口，线程2的优先级比线程1低，应该线程1先获得执行。*/
static void thread2_entry(void *parameter)
{
int i;
while(1)
{
rt_kprintf("try to release block\n");
for (i = 0 ; i < 48; i ++)
{
/* 释放所有分配成功的内存块 */
if (ptr[i] != RT_NULL)
{
rt_kprintf("release block %d\n", i);
rt_mp_free(ptr[i]);
ptr[i] = RT_NULL;
}
}
/* 休眠10个OS Tick */
rt_thread_delay(10);
}
}
/// Return an allocated memory block back to a specific memory pool
osStatus osPoolFree(osPoolId pool_id, void *block)
{
rt_mp_free(block);
return osOK;
}
void sbuf_release(void* ptr)
{
rt_mp_free(ptr);
}