A value of the type Time in package Calendar, or of some other implementation-defined time type, represents a time as reported by a corresponding clock. 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. 40 declare use Ada.