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is a pointer to a variable that will contain an error code returned by this function.
OS_ERR_NONE
if If the call was successful.
OS_ERR_PTR_INVALID
if If OS_CFG_ARG_CHK_EN is set to 1 in os_cfg.h: if either p_free or p_used are NULL pointers.
OS_ERR_TASK_NOT_EXIST
if If the stack pointer of the task is a NULL pointer.
OS_ERR_TASK_OPT
if If OS_OPT_TASK_STK_CHK is not specififed whencreating the task being checked.
OS_ERR_TASK_STK_CHK_ISR
if If OS_CFG_CALLED_FROM_ISR_CHK_EN set to 1 in os_cfg.h: if calling this function from an ISR.
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