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背景
內核對象API
內核對象的主要操作方法：內核文件：object.c中實現
知識點
查看內核文件：object.c，發現的主要的幾個知識點
驗證與測試
- 光看內核代碼，不如敲一敲（抄一下）。
- 可以使用模擬器，寫幾個測試函數，看看對象操作的流程。
測試用例如下：
/* RT-Thread 內核對象學習 */
#include < rtthread.h >
struct _obj_type
{
enum rt_object_class_type type;
const char* name;
};
/* 靜態的對象定義 */
static struct rt_object _obj[] = { 0 };
/* 測試用，線程對象 */
static const struct _obj_type _obj_tbl[] =
{
{ RT_Object_Class_Thread, "th_01" },
{ RT_Object_Class_Thread, "th_02" },
{ RT_Object_Class_Thread, "th_03" },
{ RT_Object_Class_Thread, "th_04" },
{ RT_Object_Class_Thread, "th_05" },
};
#define OBJ_TEST_TBL_SIZE (sizeof(_obj_tbl) / sizeof(_obj_tbl[0]))
/* 靜態初始化對象 */
void obj_test_init(void)
{
rt_uint8_t index = 0;
rt_uint8_t obj_size = 0;
for (index = 0; index < OBJ_TEST_TBL_SIZE; index++)
{
rt_object_init(&_obj[index], _obj_tbl[index].type, _obj_tbl[index].name);
}
}
/* 動態創建對象 obj_test_create thread1 */
void obj_test_create(uint8_t argc, char** argv)
{
struct rt_object* obj = RT_NULL;
if (argc >= 2)
{
rt_kprintf(" obj_name=%s\\n", argv[1]);
}
obj = rt_object_find(argv[1], RT_Object_Class_Thread);
if (obj != RT_NULL)
{
rt_kprintf("obj_name=%s, exist!!\\n", obj- >name);
return;
}
else
{
rt_object_allocate(RT_Object_Class_Thread, argv[1]);
rt_kprintf("create obj_name=%s\\n", argv[1]);
}
}
/* 對象的打印 */
void obj_test_dump(void)
{
rt_uint8_t index = 0;
rt_uint8_t obj_size = 0;
struct rt_object* obj_pointers[OBJ_TEST_TBL_SIZE + 10] = { 0 };
obj_size = rt_object_get_pointers(RT_Object_Class_Thread, obj_pointers, sizeof(obj_pointers));
rt_kprintf("object init : object size=%d\\n", obj_size);
rt_kprintf("| index | name | flag | type |\\n");
rt_kprintf("+-------+--------------+--------+--------+\\n");
for (index = 0; index < obj_size; index++)
{
if (obj_pointers[index] == RT_NULL)
{
break;
}
rt_kprintf("| %03d | %10s | %02d | 0x%02x |\\n", index,
obj_pointers[index]- >name, obj_pointers[index]- >flag,
obj_pointers[index]- >type);
}
rt_kprintf("+-------+--------------+--------+--------+\\n");
}
/* 查找線程對象 */
void obj_test_find(uint8_t argc, char** argv)
{
struct rt_object* obj = RT_NULL;
if (argc >= 2)
{
rt_kprintf(" obj_name=%s\\n", argv[1]);
}
obj = rt_object_find(argv[1], RT_Object_Class_Thread);
if (obj != RT_NULL)
{
rt_kprintf("find obj_name=%s\\n", obj- >name);
}
else
{
rt_kprintf("not find obj_name=%s\\n", argv[1]);
}
}
/* 靜態對象 detach */
void obj_test_detach(uint8_t argc, char** argv)
{
struct rt_object* obj = RT_NULL;
if (argc >= 2)
{
rt_kprintf(" obj_name=%s\\n", argv[1]);
}
obj = rt_object_find(argv[1], RT_Object_Class_Thread);
if (obj != RT_NULL)
{
rt_kprintf("find obj_name=%s\\n", obj- >name);
rt_object_detach(obj);
rt_kprintf("detach obj_name=%s\\n", obj- >name);
}
else
{
rt_kprintf("not find obj_name=%s\\n", argv[1]);
}
}
/* 動態對象 delete */
void obj_test_delete(uint8_t argc, char** argv)
{
struct rt_object* obj = RT_NULL;
if (argc >= 2)
{
rt_kprintf(" obj_name=%s\\n", argv[1]);
}
obj = rt_object_find(argv[1], RT_Object_Class_Thread);
if (obj != RT_NULL)
{
rt_kprintf("find obj_name=%s\\n", obj- >name);
rt_object_delete(obj);
rt_kprintf("delete obj_name=%s\\n", obj- >name);
}
else
{
rt_kprintf("not find obj_name=%s\\n", argv[1]);
}
}
/* 導出命令 */
MSH_CMD_EXPORT(obj_test_init, object init test);
MSH_CMD_EXPORT(obj_test_create, obj create test);
MSH_CMD_EXPORT(obj_test_dump, object test dump);
MSH_CMD_EXPORT(obj_test_find, object test find);
MSH_CMD_EXPORT(obj_test_detach, object test detach);
MSH_CMD_EXPORT(obj_test_delete, object test del);