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Diffstat (limited to 'gcc/ada/s-tpopde-vms.adb')
| -rw-r--r-- | gcc/ada/s-tpopde-vms.adb | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/gcc/ada/s-tpopde-vms.adb b/gcc/ada/s-tpopde-vms.adb new file mode 100644 index 00000000000..89db8240ad8 --- /dev/null +++ b/gcc/ada/s-tpopde-vms.adb @@ -0,0 +1,163 @@ +------------------------------------------------------------------------------ +-- -- +-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- SYSTEM.TASK_PRIMITIVES.OPERATIONS.DEC -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 2000-2004 Free Software Foundation, Inc. -- +-- -- +-- GNARL 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. GNARL 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 GNARL; 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. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package is for OpenVMS/Alpha + +with System.OS_Interface; +with System.Parameters; +with System.Tasking; +with Unchecked_Conversion; +with System.Soft_Links; + +package body System.Task_Primitives.Operations.DEC is + + use System.OS_Interface; + use System.Parameters; + use System.Tasking; + use System.Aux_DEC; + use type Interfaces.C.int; + + package SSL renames System.Soft_Links; + + -- The FAB_RAB_Type specifies where the context field (the calling + -- task) is stored. Other fields defined for FAB_RAB arent' need and + -- so are ignored. + + type FAB_RAB_Type is record + CTX : Unsigned_Longword; + end record; + + for FAB_RAB_Type use record + CTX at 24 range 0 .. 31; + end record; + + for FAB_RAB_Type'Size use 224; + + type FAB_RAB_Access_Type is access all FAB_RAB_Type; + + ----------------------- + -- Local Subprograms -- + ----------------------- + + function To_Unsigned_Longword is new + Unchecked_Conversion (Task_ID, Unsigned_Longword); + + function To_Task_Id is new + Unchecked_Conversion (Unsigned_Longword, Task_ID); + + function To_FAB_RAB is new + Unchecked_Conversion (Address, FAB_RAB_Access_Type); + + --------------------------- + -- Interrupt_AST_Handler -- + --------------------------- + + procedure Interrupt_AST_Handler (ID : Address) is + Result : Interfaces.C.int; + AST_Self_ID : constant Task_ID := To_Task_ID (ID); + begin + Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access); + pragma Assert (Result = 0); + end Interrupt_AST_Handler; + + --------------------- + -- RMS_AST_Handler -- + --------------------- + + procedure RMS_AST_Handler (ID : Address) is + AST_Self_ID : constant Task_ID := To_Task_Id (To_FAB_RAB (ID).CTX); + Result : Interfaces.C.int; + + begin + AST_Self_ID.Common.LL.AST_Pending := False; + Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access); + pragma Assert (Result = 0); + end RMS_AST_Handler; + + ---------- + -- Self -- + ---------- + + function Self return Unsigned_Longword is + Self_ID : constant Task_ID := Self; + begin + Self_ID.Common.LL.AST_Pending := True; + return To_Unsigned_Longword (Self); + end Self; + + ------------------------- + -- Starlet_AST_Handler -- + ------------------------- + + procedure Starlet_AST_Handler (ID : Address) is + Result : Interfaces.C.int; + AST_Self_ID : constant Task_ID := To_Task_ID (ID); + begin + AST_Self_ID.Common.LL.AST_Pending := False; + Result := pthread_cond_signal_int_np (AST_Self_ID.Common.LL.CV'Access); + pragma Assert (Result = 0); + end Starlet_AST_Handler; + + ---------------- + -- Task_Synch -- + ---------------- + + procedure Task_Synch is + Synch_Self_ID : constant Task_ID := Self; + + begin + if Single_Lock then + Lock_RTS; + else + Write_Lock (Synch_Self_ID); + end if; + + SSL.Abort_Defer.all; + Synch_Self_ID.Common.State := AST_Server_Sleep; + + while Synch_Self_ID.Common.LL.AST_Pending loop + Sleep (Synch_Self_ID, AST_Server_Sleep); + end loop; + + Synch_Self_ID.Common.State := Runnable; + + if Single_Lock then + Unlock_RTS; + else + Unlock (Synch_Self_ID); + end if; + + SSL.Abort_Undefer.all; + end Task_Synch; + +end System.Task_Primitives.Operations.DEC; |