1.对象

1,1 什么是对象

所有的数据结构都是对象

1.2代码实现

1.2.1 对象类型枚举定义

rtdef.h 添加rt_object_class_type

enum rt_object_class_type{
	RT_Object_Class_NULL=0,
	RT_Object_Class_Thread ,
	RT_Object_Class_Semaphore,
	RT_Object_Class_Mutex,
	RT_Object_Class_Event,
	RT_Object_Class_MailBox,
	RT_Object_Class_MessageQueue,
	RT_Object_Class_MemHeap,
	RT_Object_Class_MemPool,
	RT_Object_Class_Device,
	RT_Object_Class_Timer,
	RT_Object_Class_Module,
	RT_Object_Class_Unknown,
	RT_Object_Class_Static = 0x80,
};

1.2.2 对象数据类型定义

struct rt_object
{
	char name[RT_NAME_MAX];
	rt_uint8_t type;
	rt_uint8_t flag;
	rt_list_t list;
};
typedef struct rt_object *rt_object_t;

RT_NAME_MAX在rt_config.h中定义，默认为8.

1.2.3 线程控制块中添加对象

struct rt_thread
{
	char name[RT_NAME_MAX];
	rt_uint8_t type;
	rt_uint8_t flag;
	rt_list_t list;
	void        *sp;	          /* 线程栈指针 */
	void        *entry;	          /* 线程入口地址 */
	void        *parameter;	      /* 线程形参 */	
	void        *stack_addr;      /* 线程起始地址 */
	rt_uint32_t stack_size;       /* 线程栈大小，单位为字节 */

3.容器

3.1 容器作用

方便管理，每创建一个对象，如线程就会放到对应的容器里。如finsh组件会获取各个内核对象的状态

3.2 容器实现

代码角度，容器是数组，一个全局变量

3.2.1 容器初始化

redef.h 中

struct rt_object_information{
	enum rt_object_class_type type;
	rt_list_t object_list;
	rt_size_t                 object_size;
};

object.c中

static struct rt_object_information rt_object_container[RT_Object_Info_Unknow]={
	{RT_Object_Class_Thread,_OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Thread),sizeof(struct rt_thread)},
#ifdef RT_USING_SEMAPHORE
	{RT_Object_Class_Semaphore,_OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Semaphore),sizeof(struct rt_semaphore)},
#endif
#ifdef RT_USING_MUTEX
    /* initialize object container - mutex */
    {RT_Object_Class_Mutex, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Mutex), sizeof(struct rt_mutex)},
#endif
#ifdef RT_USING_EVENT
    /* initialize object container - event */
    {RT_Object_Class_Event, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Event), sizeof(struct rt_event)},
#endif
#ifdef RT_USING_MAILBOX
    /* initialize object container - mailbox */
    {RT_Object_Class_MailBox, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_MailBox), sizeof(struct rt_mailbox)},
#endif
#ifdef RT_USING_MESSAGEQUEUE
    /* initialize object container - message queue */
    {RT_Object_Class_MessageQueue, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_MessageQueue), sizeof(struct rt_messagequeue)},
#endif
#ifdef RT_USING_MEMHEAP
    /* initialize object container - memory heap */
    {RT_Object_Class_MemHeap, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_MemHeap), sizeof(struct rt_memheap)},
#endif
#ifdef RT_USING_MEMPOOL
    /* initialize object container - memory pool */
    {RT_Object_Class_MemPool, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_MemPool), sizeof(struct rt_mempool)},
#endif
#ifdef RT_USING_DEVICE
    /* initialize object container - device */
    {RT_Object_Class_Device, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Device), sizeof(struct rt_device)},
#endif
    /* initialize object container - timer */
    {RT_Object_Class_Timer, _OBJ_CONTAINER_LIST_INIT(RT_Object_Info_Timer), sizeof(struct rt_timer)},
#ifdef RT_USING_MODULE
#endif
};

效果图如下

容器大小控制如下

enum rt_object_info_type{
	RT_Object_Info_Thread  = 0,
#ifdef RT_USING_SEMAPHORE
	RT_Object_Info_Semaphore,
#endif
#ifdef RT_USING_MUTEX
    RT_Object_Info_Mutex,                              /**< The object is a mutex. */
#endif
#ifdef RT_USING_EVENT
    RT_Object_Info_Event,                              /**< The object is a event. */
#endif
#ifdef RT_USING_MAILBOX
    RT_Object_Info_MailBox,                            /**< The object is a mail box. */
#endif
#ifdef RT_USING_MESSAGEQUEUE
    RT_Object_Info_MessageQueue,                       /**< The object is a message queue. */
#endif
#ifdef RT_USING_MEMHEAP
    RT_Object_Info_MemHeap,                            /**< The object is a memory heap */
#endif
#ifdef RT_USING_MEMPOOL
    RT_Object_Info_MemPool,                            /**< The object is a memory pool. */
#endif
#ifdef RT_USING_DEVICE
    RT_Object_Info_Device,                             /**< The object is a device */
#endif
    RT_Object_Info_Timer,                              /**< The object is a timer. */
#ifdef RT_USING_MODULE
    RT_Object_Info_Module,                             /**< The object is a module. */
#endif
    RT_Object_Info_Unknow,
};

3.2.1 容器接口实现

3.2.1.1 获取类型的对象

struct rt_object_information *rt_object_get_information(enum rt_object_class_type type)
{
	int index;
	for(index = 0; index < RT_Object_Info_Unknow;index++)
	{
		if(rt_object_container[index].type == type)
			return &rt_object_container[index];
	}
	return RT_NULL;
}

3.2.1.2 对象初始化

void rt_object_init(struct rt_object *object,enum rt_object_class_type type, const char *name)
{
	register rt_base_t temp;
	struct rt_object_information *info;
	info = rt_object_get_information(type);
	object->type = type | RT_Object_Class_Static;
	rt_strncpy(object->name,name,RT_NAME_MAX);
	temp = rt_hw_interrupt_disable();
	rt_list_insert_after(&(info->object_list),&(object->list));
	rt_hw_interrupt_enable(temp);
}

效果

3.2.2thread同步

thread同步

rt_err_t rt_thread_init(struct rt_thread *thread,const char *name,
                        void (*entry)(void *parameter),
                        void             *parameter,
                        void             *stack_start,
                        rt_uint32_t       stack_size,
                        rt_uint8_t priority)
{

	rt_object_init((rt_object_t)thread,RT_Object_Class_Thread,name);
	rt_list_init(&(thread->tlist));

	thread->entry = (void *)entry;
	thread->parameter = parameter;