2007-04-20  Thomas Quinot  <quinot@adacore.com>
	    Bob Duff  <duff@adacore.com>

        * g-soccon-freebsd.ads, g-soccon-vxworks.ads:,
	g-soccon-aix.ads, g-soccon-irix.ads, g-soccon-hpux.ads, 
	g-soccon-solaris.ads, g-soccon-vms.ads, g-soccon-tru64.ads:  Add new
	constant Thread_Blocking_IO, always True by default, set False
	on a per-runtime basis.
	(Need_Netdb_Buffer): New constant.

	* g-stheme.adb, g-sttsne.ads, g-sttsne-locking.ads,
	g-sttsne-locking.adb, g-sttsne-vxworks.ads, g-sttsne-vxworks.adb: New
	files.

	* g-socthi-vxworks.ads, g-socthi-vxworks.adb,
	g-socthi-vms.ads, g-socthi-vms.adb (Safe_Gethostbyname,
	Safe_Gethostbyaddr, Safe_Getservbyname, Safe_Getservbyport): Use new
	child package Task_Safe_NetDB
	(Host_Error_Messages): Add stub body.
	(GNAT.Sockets.Thin.Signalling_Fds): New procedure Close.

	* g-soccon-mingw.ads: Add Windows-specific constants.
	(Need_Netdb_Buffer): New constant.
	(GNAT.Sockets.Thin.C_Inet_Addr, Windows version): Remove useless Ada
	wrapper and import inet_addr(3) from the standard sockets library
	directly instead.
	(In_Addr): Add alignment clause.
	(GNAT.Sockets.Thin.Signalling_Fds): New procedure Close.

From-SVN: r125358