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Diffstat (limited to 'gcc-4.2.1/gcc/ada/a-retide.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/a-retide.adb | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/a-retide.adb b/gcc-4.2.1/gcc/ada/a-retide.adb new file mode 100644 index 000000000..1c8eabb87 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/a-retide.adb @@ -0,0 +1,85 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- A D A . R E A L _ T I M E . D E L A Y S -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2005, 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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. -- +-- -- +------------------------------------------------------------------------------ + +with Ada.Exceptions; +-- Used for Raise_Exception + +with System.Tasking; +-- Used for Task_Id + +with System.Task_Primitives.Operations; +-- Used for Timed_Delay +-- Self + +package body Ada.Real_Time.Delays is + + package STPO renames System.Task_Primitives.Operations; + + ---------------- + -- Local Data -- + ---------------- + + Absolute_RT : constant := 2; + + ----------------- + -- Delay_Until -- + ----------------- + + procedure Delay_Until (T : Time) is + Self_Id : constant System.Tasking.Task_Id := STPO.Self; + + begin + -- If pragma Detect_Blocking is active, Program_Error must be + -- raised if this potentially blocking operation is called from a + -- protected action. + + if System.Tasking.Detect_Blocking + and then Self_Id.Common.Protected_Action_Nesting > 0 + then + Ada.Exceptions.Raise_Exception + (Program_Error'Identity, "potentially blocking operation"); + else + STPO.Timed_Delay (Self_Id, To_Duration (T), Absolute_RT); + end if; + end Delay_Until; + + ----------------- + -- To_Duration -- + ----------------- + + function To_Duration (T : Time) return Duration is + begin + return To_Duration (Time_Span (T)); + end To_Duration; + +end Ada.Real_Time.Delays; |