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Diffstat (limited to 'gcc/ada/g-locfil.ads')
| -rw-r--r-- | gcc/ada/g-locfil.ads | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/gcc/ada/g-locfil.ads b/gcc/ada/g-locfil.ads new file mode 100644 index 00000000000..47715c69bee --- /dev/null +++ b/gcc/ada/g-locfil.ads @@ -0,0 +1,67 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- G N A T . L O C K _ F I L E S -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.2 $ +-- -- +-- Copyright (C) 1995-2001 Ada Core Technologies, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + + -- This package contains the necessary routines for using files for the + -- purpose of providing realiable system wide locking capability. + +package GNAT.Lock_Files is +pragma Preelaborate; + + Lock_Error : exception; + -- Exception raised if file cannot be locked + + procedure Lock_File + (Directory : String; + Lock_File_Name : String; + Wait : Duration := 1.0; + Retries : Natural := Natural'Last); + -- Create a lock file Lock_File_Name in directory Directory. If the file + -- cannot be locked because someone already owns the lock, this procedure + -- waits Wait seconds and retries at most Retries times. If the file + -- still cannot be locked, Lock_Error is raised. The default is to try + -- every second, almost forever (Natural'Last times). + + procedure Lock_File + (Lock_File_Name : String; + Wait : Duration := 1.0; + Retries : Natural := Natural'Last); + -- See above. The full lock file path is given as one string. + + procedure Unlock_File (Directory : String; Lock_File_Name : String); + -- Unlock a file + + procedure Unlock_File (Lock_File_Name : String); + -- Unlock a file whose full path is given in Lock_File_Name + +end GNAT.Lock_Files; |