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Diffstat (limited to 'gcc/ada/s-gloloc-mingw.adb')
| -rw-r--r-- | gcc/ada/s-gloloc-mingw.adb | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/gcc/ada/s-gloloc-mingw.adb b/gcc/ada/s-gloloc-mingw.adb new file mode 100644 index 00000000000..2b775b239db --- /dev/null +++ b/gcc/ada/s-gloloc-mingw.adb @@ -0,0 +1,113 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . G L O B A L _ L O C K S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1999-2001 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 was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This implementation is specific to NT. + +with GNAT.Task_Lock; + +with Interfaces.C.Strings; +with System.OS_Interface; + +package body System.Global_Locks is + + package TSL renames GNAT.Task_Lock; + package OSI renames System.OS_Interface; + package ICS renames Interfaces.C.Strings; + + subtype Lock_File_Entry is OSI.HANDLE; + + Last_Lock : Lock_Type := Null_Lock; + Lock_Table : array (Lock_Type range 1 .. 15) of Lock_File_Entry; + + ----------------- + -- Create_Lock -- + ----------------- + + procedure Create_Lock + (Lock : out Lock_Type; + Name : in String) + is + L : Lock_Type; + + begin + TSL.Lock; + Last_Lock := Last_Lock + 1; + L := Last_Lock; + TSL.Unlock; + + if L > Lock_Table'Last then + raise Lock_Error; + end if; + + Lock_Table (L) := + OSI.CreateMutex (null, OSI.BOOL (False), ICS.New_String (Name)); + Lock := L; + end Create_Lock; + + ------------------ + -- Acquire_Lock -- + ------------------ + + procedure Acquire_Lock + (Lock : in out Lock_Type) + is + use type OSI.DWORD; + + Res : OSI.DWORD; + begin + Res := OSI.WaitForSingleObject (Lock_Table (Lock), OSI.Wait_Infinite); + + if Res = OSI.WAIT_FAILED then + raise Lock_Error; + end if; + end Acquire_Lock; + + ------------------ + -- Release_Lock -- + ------------------ + + procedure Release_Lock + (Lock : in out Lock_Type) + is + use type OSI.BOOL; + + Res : OSI.BOOL; + begin + Res := OSI.ReleaseMutex (Lock_Table (Lock)); + + if Res = OSI.False then + raise Lock_Error; + end if; + end Release_Lock; + +end System.Global_Locks; |