...
'p_err' gets set to OS_ERR_NONE before OSSched() to allow the returned error code to be monitored (by another task) even for a task that is deleting itself. In this case, p_err must point to a global variable that can be accessed by that other task and, you should initialize that variable to OS_ERR_TASK_RUNNING prior to deleting the task.
OS_ERR_TASKILLEGAL_DEL_RUN_IDLE
...
TIME
If OS_SAFETY_CRITICAL_IEC61508 is defined: you called this after calling OSStart() and thus you are no longer allowed to delete kernel objects.
OS_ERR_TASKOS_DELNOT_ISRRUNNING
If If OS_CFG_CALLEDINVALID_FROMOS_ISRCALLS_CHK_EN set to 1 in is set to DEF_ENABLED in os_cfg.h: if you called OSTaskDel() from an ISRif µC/OS-III is not running yet.
OS_ERR_STATE_INVALID
If the task is in an invalid state.
OS_ERR_TASK_DEL_IDLE
If attempting to delete the idle task.
OS_ERR_TASK_DEL_INVALID
If attempting to delete the ISR Handler task while while OS_CFG_ISR_POST_DEFERRED_EN is set to 1 is set to DEF_ENABLED.
OS_ERR_TASK_DEL_ISR
If OS_CFG_CALLED_FROM_ISR_CHK_EN set to DEF_ENABLED in os_cfg.h: if you called OSTaskDel() from an ISR.
Returned Value
None
Required Configuration
NoneOS_CFG_TASK_DEL_EN must be enabled in os_cfg.h. Refer to µC-OS-III Configuration Manual.
Callers
Application.
Notes/Warnings
OSTaskDel()verifies that the user is not attempting to delete the µC/OS-III idle task and the ISR handler task.- Be careful when deleting a task that owns resources.