A task is said to be in the Blocked state if it is currently waiting for either a temporal or external event. Tasks can also block to wait for queue, semaphore, event group, notification or semaphore event. Tasks in the Blocked state normally have a 'timeout' period, after which the task will be timeout, and be unblocked, even if the event the task was waiting for has not occurred.
Tasks in the Blocked state do not use any processing time and cannot be selected to enter the Running state.
