The type Duration is not specific to a particular time base, but can be used with any time base. If the expiration time has already passed, the task is not blocked. Calendar is implementation defined. The function Clock of package Calendar returns a value representing the current time for this time base. The implementation-defined value of the named number System.
Clock remains constant.
The actual limit, if any, is implementation-defined. Whenever possible in an implementation, the value of Duration'Small should be no greater than 100 microseconds. There is no necessary relationship between System. Email comments, additions, corrections, gripes, kudos, etc.