2007-04-06  Pascal Obry  <obry@adacore.com>
	    Thomas Quinot  <quinot@adacore.com>

	* g-os_lib.ads (Current_Time): New function. Returns the current
	system time as an OS_Time value.

	* s-osprim.ads (Clock): Add more precise definition of UNIX epoch.
	(Monotonic_Clock): Same.

From-SVN: r123547