diff options
Diffstat (limited to 'gcc-4.4.0/gcc/ada/s-tasinf-tru64.ads')
| -rw-r--r-- | gcc-4.4.0/gcc/ada/s-tasinf-tru64.ads | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/gcc-4.4.0/gcc/ada/s-tasinf-tru64.ads b/gcc-4.4.0/gcc/ada/s-tasinf-tru64.ads new file mode 100644 index 000000000..af2832d09 --- /dev/null +++ b/gcc-4.4.0/gcc/ada/s-tasinf-tru64.ads @@ -0,0 +1,110 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T A S K _ I N F O -- +-- -- +-- S p e c -- +-- (Compiler Interface) -- +-- -- +-- Copyright (C) 1998-2009, Free Software Foundation, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains the definitions and routines associated with the +-- implementation and use of the Task_Info pragma. It is specialized +-- appropriately for targets that make use of this pragma. + +-- Note: the compiler generates direct calls to this interface, via Rtsfind. +-- Any changes to this interface may require corresponding compiler changes. + +-- This unit may be used directly from an application program by providing +-- an appropriate WITH, and the interface can be expected to remain stable. + +-- This is a DEC Unix 4.0d version of this package + +package System.Task_Info is + pragma Preelaborate; + pragma Elaborate_Body; + -- To ensure that a body is allowed + + ----------------------------------------- + -- Implementation of Task_Info Feature -- + ----------------------------------------- + + -- The Task_Info pragma: + + -- pragma Task_Info (EXPRESSION); + + -- allows the specification on a task by task basis of a value of type + -- System.Task_Info.Task_Info_Type to be passed to a task when it is + -- created. The specification of this type, and the effect on the task + -- that is created is target dependent. + + -- The Task_Info pragma appears within a task definition (compare the + -- definition and implementation of pragma Priority). If no such pragma + -- appears, then the value Unspecified_Task_Info is passed. If a pragma + -- is present, then it supplies an alternative value. If the argument of + -- the pragma is a discriminant reference, then the value can be set on + -- a task by task basis by supplying the appropriate discriminant value. + + -- Note that this means that the type used for Task_Info_Type must be + -- suitable for use as a discriminant (i.e. a scalar or access type). + + ------------------ + -- Declarations -- + ------------------ + + type Scope_Type is + (Process_Scope, + -- Contend only with threads in same process + + System_Scope, + -- Contend with all threads on same CPU + + Default_Scope); + + type Thread_Attributes is record + Bind_To_Cpu_Number : Integer; + -- -1: Do nothing + -- 0: Unbind + -- 1-N: Bind all unbound threads to this CPU + + Contention_Scope : Scope_Type; + end record; + + type Task_Info_Type is access all Thread_Attributes; + -- Type used for passing information to task create call, using the + -- Task_Info pragma. This type may be specialized for individual + -- implementations, but it must be a type that can be used as a + -- discriminant (i.e. a scalar or access type). + + Unspecified_Thread_Attribute : aliased Thread_Attributes := + Thread_Attributes'(-1, Default_Scope); + + Unspecified_Task_Info : constant Task_Info_Type := + Unspecified_Thread_Attribute'Access; + -- Value passed to task in the absence of a Task_Info pragma + -- Don't call new here because the tasking run time has not been + -- elaborated yet, so calling Task_Lock is unsafe. + +end System.Task_Info; |