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Diffstat (limited to 'gcc/ada/5ftasinf.ads')
| -rw-r--r-- | gcc/ada/5ftasinf.ads | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/gcc/ada/5ftasinf.ads b/gcc/ada/5ftasinf.ads new file mode 100644 index 00000000000..8faecacb6a6 --- /dev/null +++ b/gcc/ada/5ftasinf.ads @@ -0,0 +1,142 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . T A S K _ I N F O -- +-- -- +-- S p e c -- +-- (Compiler Interface) -- +-- -- +-- $Revision: 1.4 $ +-- -- +-- Copyright (C) 1992-2000 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 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. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +-- This package contains the definitions and routines associated with the +-- implementation 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. + +with Interfaces.C; +with System.OS_Interface; +with Unchecked_Deallocation; + +package System.Task_Info is +pragma Elaborate_Body; +-- To ensure that a body is allowed + + package OSI renames System.OS_Interface; + + ----------------------------------------- + -- Implementation of Task_Info Feature -- + ----------------------------------------- + + -- Pragma Task_Info allows an application to set the underlying + -- pthread scheduling attributes for a specific task. + + ------------------ + -- Declarations -- + ------------------ + + type Thread_Scheduling_Scope is + (PTHREAD_SCOPE_PROCESS, PTHREAD_SCOPE_SYSTEM); + + for Thread_Scheduling_Scope'Size use Interfaces.C.int'Size; + + type Thread_Scheduling_Inheritance is + (PTHREAD_EXPLICIT_SCHED, PTHREAD_INHERIT_SCHED); + + for Thread_Scheduling_Inheritance'Size use Interfaces.C.int'Size; + + type Thread_Scheduling_Policy is + (SCHED_FIFO, -- The first-in-first-out real-time policy + SCHED_RR, -- The round-robin real-time scheduling policy + SCHED_TS); -- The timeshare earnings based scheduling policy + + for Thread_Scheduling_Policy'Size use Interfaces.C.int'Size; + for Thread_Scheduling_Policy use + (SCHED_FIFO => 1, + SCHED_RR => 2, + SCHED_TS => 3); + + function SCHED_OTHER return Thread_Scheduling_Policy renames SCHED_TS; + + No_Specified_Priority : constant := -1; + + subtype Thread_Scheduling_Priority is Integer range + No_Specified_Priority .. 255; + + function Min (Policy : Interfaces.C.int) return Interfaces.C.int + renames OSI.sched_get_priority_min; + + function Max (Policy : Interfaces.C.int) return Interfaces.C.int + renames OSI.sched_get_priority_max; + + subtype FIFO_Priority is Thread_Scheduling_Priority range + Thread_Scheduling_Priority (Min (OSI.SCHED_FIFO)) .. + Thread_Scheduling_Priority (Max (OSI.SCHED_FIFO)); + + subtype RR_Priority is Thread_Scheduling_Priority range + Thread_Scheduling_Priority (Min (OSI.SCHED_RR)) .. + Thread_Scheduling_Priority (Max (OSI.SCHED_RR)); + + subtype TS_Priority is Thread_Scheduling_Priority range + Thread_Scheduling_Priority (Min (OSI.SCHED_TS)) .. + Thread_Scheduling_Priority (Max (OSI.SCHED_TS)); + + subtype OTHER_Priority is Thread_Scheduling_Priority range + Thread_Scheduling_Priority (Min (OSI.SCHED_OTHER)) .. + Thread_Scheduling_Priority (Max (OSI.SCHED_OTHER)); + + subtype CPU_Number is Integer range -1 .. Integer'Last; + ANY_CPU : constant CPU_Number := CPU_Number'First; + + type Thread_Attributes is record + Scope : Thread_Scheduling_Scope := PTHREAD_SCOPE_PROCESS; + Inheritance : Thread_Scheduling_Inheritance := PTHREAD_EXPLICIT_SCHED; + Policy : Thread_Scheduling_Policy := SCHED_RR; + Priority : Thread_Scheduling_Priority := No_Specified_Priority; + Runon_CPU : CPU_Number := ANY_CPU; + end record; + + Default_Thread_Attributes : constant Thread_Attributes := + (PTHREAD_SCOPE_PROCESS, PTHREAD_EXPLICIT_SCHED, SCHED_RR, + No_Specified_Priority, ANY_CPU); + + type Task_Info_Type is access all Thread_Attributes; + + type Task_Image_Type is access String; + -- Used to generate a meaningful identifier for tasks that are variables + -- and components of variables. + + procedure Free_Task_Image is new + Unchecked_Deallocation (String, Task_Image_Type); + + Unspecified_Task_Info : constant Task_Info_Type := null; + -- Value passed to task in the absence of a Task_Info pragma + +end System.Task_Info; |