/* 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* sbuf_alloc()
{
if (is_inited == RT_FALSE)
{
sbuf_init();
is_inited = RT_TRUE;
}
return (rt_uint16_t*)rt_mp_alloc(&_mp, RT_WAITING_FOREVER);
}
rt_err_t rt_prio_queue_push(struct rt_prio_queue *que,
rt_uint8_t prio,
void *data,
rt_int32_t timeout)
{
rt_ubase_t level;
struct rt_prio_queue_item *item;
RT_ASSERT(que);
if (prio >= RT_PRIO_QUEUE_PRIO_MAX)
return -RT_ERROR;
item = rt_mp_alloc(&que->pool, timeout);
if (item == RT_NULL)
return -RT_ENOMEM;
rt_memcpy(item+1, data, que->item_sz);
item->next = RT_NULL;
level = rt_hw_interrupt_disable();
_do_push(que, prio, item);
if (!rt_list_isempty(&(que->suspended_pop_list)))
{
rt_thread_t thread;
/* get thread entry */
thread = rt_list_entry(que->suspended_pop_list.next,
struct rt_thread,
tlist);
/* resume it */
rt_thread_resume(thread);
rt_hw_interrupt_enable(level);
/* perform a schedule */
rt_schedule();
return RT_EOK;
}
/// Allocate a memory block from a memory pool
void *osPoolAlloc(osPoolId pool_id)
{
return rt_mp_alloc(pool_id, 0);
}
static rt_size_t rt_serial_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
rt_uint8_t* ptr;
rt_err_t err_code;
struct stm32_serial_device* uart;
err_code = RT_EOK;
ptr = (rt_uint8_t*)buffer;
uart = (struct stm32_serial_device*)dev->user_data;
if (dev->flag & RT_DEVICE_FLAG_INT_TX)
{
/* interrupt mode Tx, does not support */
RT_ASSERT(0);
}
else if (dev->flag & RT_DEVICE_FLAG_DMA_TX)
{
/* DMA mode Tx */
/* allocate a data node */
struct stm32_serial_data_node* data_node = (struct stm32_serial_data_node*)
rt_mp_alloc (&(uart->dma_tx->data_node_mp), RT_WAITING_FOREVER);
if (data_node == RT_NULL)
{
/* set error code */
err_code = -RT_ENOMEM;
}
else
{
rt_uint32_t level;
/* fill data node */
data_node->data_ptr = ptr;
data_node->data_size = size;
/* insert to data link */
data_node->next = RT_NULL;
/* disable interrupt */
level = rt_hw_interrupt_disable();
data_node->prev = uart->dma_tx->list_tail;
if (uart->dma_tx->list_tail != RT_NULL)
uart->dma_tx->list_tail->next = data_node;
uart->dma_tx->list_tail = data_node;
if (uart->dma_tx->list_head == RT_NULL)
{
/* start DMA to transmit data */
uart->dma_tx->list_head = data_node;
/* Enable DMA Channel */
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);
}
/* enable interrupt */
rt_hw_interrupt_enable(level);
}
}
else
{
/* polling mode */
if (dev->flag & RT_DEVICE_FLAG_STREAM)
{
/* stream mode */
while (size)
{
if (*ptr == '\n')
{
while (!(uart->uart_device->SR & USART_FLAG_TXE));
uart->uart_device->DR = '\r';
}
while (!(uart->uart_device->SR & USART_FLAG_TXE));
uart->uart_device->DR = (*ptr & 0x1FF);
++ptr; --size;
}
}
else
{
/* write data directly */
while (size)
{
while (!(uart->uart_device->SR & USART_FLAG_TXE));
uart->uart_device->DR = (*ptr & 0x1FF);
++ptr; --size;
}
}
}
/* set error code */
rt_set_errno(err_code);
return (rt_uint32_t)ptr - (rt_uint32_t)buffer;
}
