-- --
-- package Persistent.Data_Bank Copyright (c) Dmitry A. Kazakov --
-- Implementation Luebeck --
-- Winter, 2002 --
-- --
-- Last revision : 10:05 22 Nov 2014 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- 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 along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 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. --
--____________________________________________________________________--
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
package body Persistent.Data_Bank is
procedure Commit (Mutex : in out Access_Mutex) is
begin
if Mutex.Committed then
Raise_Exception
( Use_Error'Identity,
"Transaction already committed"
);
else
Mutex.Committed := True;
Commit (Mutex.Storage.all);
end if;
end Commit;
procedure Finalize (Mutex : in out Access_Mutex) is
begin
if not Mutex.Committed then
Mutex.Committed := True;
Roll_Back (Mutex.Storage.all);
end if;
end Finalize;
procedure Initialize (Mutex : in out Read_Mutex) is
begin
Seize_Read (Mutex.Storage.all);
end Initialize;
procedure Initialize (Mutex : in out Write_Mutex) is
begin
Seize_Write (Mutex.Storage.all);
end Initialize;
end Persistent.Data_Bank;