UINT32 LOS_TaskCreateOnly ( UINT32 puwTaskID,
TSK_INIT_PARAM_S pstInitParam  
)

Create a task and suspend.

Description:
This API is used to create a task and suspend it. This task will not be added to the queue of ready tasks before resume it.
注意:
  • During task creation, the task control block and task stack of the task that is previously automatically deleted are deallocated.
  • The task name is a pointer and is not allocated memory.
  • If the size of the task stack of the task to be created is 0, configure LOSCFG_BASE_CORE_TSK_DEFAULT_STACK_SIZE to specify the default task stack size. The stack size should be a reasonable value, if the size is too large, may cause memory exhaustion.
  • The task stack size must be aligned on the boundary of 8 bytes. The size is determined by whether it is big enough to avoid task stack overflow.
  • Less parameter value indicates higher task priority.
  • The task name cannot be null.
  • The pointer to the task executing function cannot be null.
  • The two parameters of this interface is pointer, it should be a correct value, otherwise, the system may be abnormal.
参数:
参数名称 描述
puwTaskID  [OUT] Type UINT32 * Task ID.
pstInitParam  [IN] Type TSK_INIT_PARAM_S * Parameter for task creation.
返回值:
返回值 描述
LOS_ERRNO_TSK_ID_INVALID  Invalid Task ID, param puwTaskID is NULL.
LOS_ERRNO_TSK_PTR_NULL  Param pstInitParam is NULL.
LOS_ERRNO_TSK_NAME_EMPTY  The task name is NULL.
LOS_ERRNO_TSK_ENTRY_NULL  The task entrance is NULL.
LOS_ERRNO_TSK_PRIOR_ERROR  Incorrect task priority.
LOS_ERRNO_TSK_STKSZ_TOO_LARGE  The task stack size is too large.
LOS_ERRNO_TSK_STKSZ_TOO_SMALL  The task stack size is too small.
LOS_ERRNO_TSK_TCB_UNAVAILABLE  No free task control block is available.
LOS_ERRNO_TSK_NO_MEMORY  Insufficient memory for task creation.
LOS_OK  The task is successfully created.
Dependency:
  • los_task.h: the header file that contains the API declaration.
  • los_config.h: the header file that contains system configuration items.
参见:
LOS_TaskDelete
自从:
Huawei LiteOS V100R001C00