/**
* This function will create a thread object and allocate thread object memory
* and stack.
*
* @param name the name of thread, which shall be unique
* @param entry the entry function of thread
* @param parameter the parameter of thread enter function
* @param stack_size the size of thread stack
* @param priority the priority of thread
* @param tick the time slice if there are same priority thread
*
* @return the created thread object
*
*/
rt_thread_t rt_thread_create(const char *name,
void (*entry)(void *parameter), void *parameter,
rt_uint32_t stack_size,
rt_uint8_t priority,
rt_uint32_t tick)
{
struct rt_thread *thread;
void *stack_start;
thread = (struct rt_thread *)rt_object_allocate(RT_Object_Class_Thread, name);
if (thread == RT_NULL) return RT_NULL;
stack_start = (void *)rt_malloc(stack_size);
if (stack_start == RT_NULL)
{
/* allocate stack failure */
rt_object_delete((rt_object_t)thread);
return RT_NULL;
}
_rt_thread_init(thread, name, entry, parameter,
stack_start, stack_size,
priority, tick);
return thread;
}
static void rt_thread_idle_entry(void* parameter)
{
while (1)
{
#ifdef RT_USING_HOOK
/* if there is an idle thread hook */
if (rt_thread_idle_hook != RT_NULL) rt_thread_idle_hook();
#endif
#ifdef RT_USING_HEAP
/* check the defunct thread list */
if (!rt_list_isempty(&rt_thread_defunct))
{
rt_base_t lock;
struct rt_thread* thread = rt_list_entry(rt_thread_defunct.next, struct rt_thread, tlist);
/* disable interrupt */
lock = rt_hw_interrupt_disable();
rt_list_remove(&(thread->tlist));
/* enable interrupt */
rt_hw_interrupt_enable(lock);
/* release thread's stack */
rt_free(thread->stack_addr);
/* delete thread object */
rt_object_delete((rt_object_t)thread);
}
#endif
}
/**
* This function will create a mempool object and allocate the memory pool from
* heap.
*
* @param name the name of memory pool
* @param block_count the count of blocks in memory pool
* @param block_size the size for each block
*
* @return the created mempool object
*/
rt_mp_t rt_mp_create(const char *name,
rt_size_t block_count,
rt_size_t block_size)
{
rt_uint8_t *block_ptr;
struct rt_mempool *mp;
register rt_base_t offset;
RT_DEBUG_NOT_IN_INTERRUPT;
/* allocate object */
mp = (struct rt_mempool *)rt_object_allocate(RT_Object_Class_MemPool, name);
/* allocate object failed */
if (mp == RT_NULL)
return RT_NULL;
/* initialize memory pool */
block_size = RT_ALIGN(block_size, RT_ALIGN_SIZE);
mp->block_size = block_size;
mp->size = (block_size + sizeof(rt_uint8_t *)) * block_count;
/* allocate memory */
mp->start_address = rt_malloc((block_size + sizeof(rt_uint8_t *)) *
block_count);
if (mp->start_address == RT_NULL)
{
/* no memory, delete memory pool object */
rt_object_delete(&(mp->parent));
return RT_NULL;
}
mp->block_total_count = block_count;
mp->block_free_count = mp->block_total_count;
/* initialize suspended thread list */
rt_list_init(&(mp->suspend_thread));
mp->suspend_thread_count = 0;
/* initialize free block list */
block_ptr = (rt_uint8_t *)mp->start_address;
for (offset = 0; offset < mp->block_total_count; offset ++)
{
*(rt_uint8_t **)(block_ptr + offset * (block_size + sizeof(rt_uint8_t *)))
= block_ptr + (offset + 1) * (block_size + sizeof(rt_uint8_t *));
}
*(rt_uint8_t **)(block_ptr + (offset - 1) * (block_size + sizeof(rt_uint8_t *)))
= RT_NULL;
mp->block_list = block_ptr;
return mp;
}
/**
* This function will delete a mutex object and release the memory
*
* @param mutex the mutex object
*
* @return the error code
*
* @see rt_mutex_detach
*/
rt_err_t rt_mutex_delete (rt_mutex_t mutex)
{
RT_ASSERT(mutex != RT_NULL);
/* wakeup all suspend threads */
rt_ipc_object_resume_all(&(mutex->parent));
/* delete semaphore object */
rt_object_delete(&(mutex->parent.parent));
return RT_EOK;
}
/**
* This function will delete a semaphore object and release the memory
*
* @param sem the semaphore object
*
* @return the error code
*
* @see rt_sem_detach
*/
rt_err_t rt_sem_delete (rt_sem_t sem)
{
RT_ASSERT(sem != RT_NULL);
/* wakeup all suspend threads */
rt_ipc_object_resume_all(&(sem->parent));
/* delete semaphore object */
rt_object_delete(&(sem->parent.parent));
return RT_EOK;
}
/**
* This function will delete a memory pool and release the object memory.
*
* @param mp the memory pool object
*
* @return RT_EOK
*/
rt_err_t rt_mp_delete(rt_mp_t mp)
{
struct rt_thread *thread;
register rt_ubase_t temp;
RT_DEBUG_NOT_IN_INTERRUPT;
/* parameter check */
RT_ASSERT(mp != RT_NULL);
/* wake up all suspended threads */
while (!rt_list_isempty(&(mp->suspend_thread)))
{
/* disable interrupt */
temp = rt_hw_interrupt_disable();
/* get next suspend thread */
thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
/* set error code to RT_ERROR */
thread->error = -RT_ERROR;
/*
* resume thread
* In rt_thread_resume function, it will remove current thread from suspend
* list
*/
rt_thread_resume(thread);
/* decrease suspended thread count */
mp->suspend_thread_count --;
/* enable interrupt */
rt_hw_interrupt_enable(temp);
}
#if defined(RT_USING_MODULE) && defined(RT_USING_SLAB)
/* the mp object belongs to an application module */
if (mp->parent.flag & RT_OBJECT_FLAG_MODULE)
rt_module_free(mp->parent.module_id, mp->start_address);
else
#endif
/* release allocated room */
rt_free(mp->start_address);
/* detach object */
rt_object_delete(&(mp->parent));
return RT_EOK;
}
/**
* This function will delete a mutex object and release the memory
*
* @param mutex the mutex object
*
* @return the error code
*
* @see rt_mutex_detach
*/
rt_err_t rt_mutex_delete(rt_mutex_t mutex)
{
RT_DEBUG_NOT_IN_INTERRUPT;
RT_ASSERT(mutex != RT_NULL);
/* wakeup all suspend threads */
rt_ipc_list_resume_all(&(mutex->parent.suspend_thread));
/* delete semaphore object */
rt_object_delete(&(mutex->parent.parent));
return RT_EOK;
}
/**
* This function will delete a timer and release timer memory
*
* @param timer the timer to be deleted
*
* @return the operation status, RT_EOK on OK; RT_ERROR on error
*/
rt_err_t rt_timer_delete(rt_timer_t timer)
{
register rt_base_t level;
/* timer check */
RT_ASSERT(timer != RT_NULL);
/* disable interrupt */
level = rt_hw_interrupt_disable();
_rt_timer_remove(timer);
/* enable interrupt */
rt_hw_interrupt_enable(level);
rt_object_delete((rt_object_t)timer);
return -RT_EOK;
}
/**
* This function will delete a memory pool and release the object memory.
*
* @param mp the memory pool object
*
* @return the operation status, RT_EOK on OK; -RT_ERROR on error
*
*/
rt_err_t rt_mp_delete(rt_mp_t mp)
{
struct rt_thread* thread;
register rt_ubase_t temp;
/* parameter check */
RT_ASSERT(mp != RT_NULL);
/* wakeup all suspended threads */
while (!rt_list_isempty(&(mp->suspend_thread)))
{
/* disable interrupt */
temp = rt_hw_interrupt_disable();
/* get next suspend thread */
thread = rt_list_entry(mp->suspend_thread.next, struct rt_thread, tlist);
/* set error code to RT_ERROR */
thread->error = -RT_ERROR;
/*
* resume thread
* In rt_thread_resume function, it will remove current thread from suspend
* list
*/
rt_thread_resume(thread);
/* decrease suspended thread count */
mp->suspend_thread_count --;
/* enable interrupt */
rt_hw_interrupt_enable(temp);
}
/* release allocated room */
rt_free(mp->start_address);
/* detach object */
rt_object_delete(&(mp->parent));
return RT_EOK;
}