...
is a pointer to a variable that contains an error code returned by this function.
OS_ERR_NONE
if If the call was successful and the task was resumed.
OS_ERR_STATE_INVALID
if If the task is in an invalid state.
OS_ERR_TIME_DLY_RESUME_ISR
if If OS_CFG_CALLED_FROM_ISR_CHK_EN set to 1 in os_cfg.h: if calling this function from an ISR.
OS_ERR_TIME_NOT_DLY
if If OS_CFG_ARG_CHK_EN is set to 1 in os_cfg.h: if the task was not delayed or, you passed a NULL pointer for the TCB.
OS_ERR_TASK_SUSPENDED
if If the task to resume is suspended and will remain suspended.
...