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Diffstat (limited to 'gcc-4.9/gcc/ada/s-tadeca.adb')
| -rw-r--r-- | gcc-4.9/gcc/ada/s-tadeca.adb | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/ada/s-tadeca.adb b/gcc-4.9/gcc/ada/s-tadeca.adb new file mode 100644 index 000000000..6faf4d04d --- /dev/null +++ b/gcc-4.9/gcc/ada/s-tadeca.adb @@ -0,0 +1,76 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- SYSTEM.TASKING.ASYNC_DELAYS.ENQUEUE_CALENDAR -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1998-2013, 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 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/>. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +with Ada.Calendar.Delays; + +with System.OS_Constants; +with System.OS_Primitives; +with System.Task_Primitives.Operations; +with System.Tasking.Initialization; + +function System.Tasking.Async_Delays.Enqueue_Calendar + (T : Ada.Calendar.Time; + D : Delay_Block_Access) return Boolean +is + use type Ada.Calendar.Time; + + package SOSC renames System.OS_Constants; + package STPO renames System.Task_Primitives.Operations; + + RT_T : Duration := Ada.Calendar.Delays.To_Duration (T); + +begin + if T <= Ada.Calendar.Clock then + D.Timed_Out := True; + System.Task_Primitives.Operations.Yield; + return False; + end if; + + -- T is expressed as a duration elapsed since the UNIX epoch, whereas + -- Time_Enqueue expects duration elapsed since the epoch of the Ada real- + -- time clock: compensate if necessary. + + -- Comparison "SOSC.CLOCK_RT_Ada = SOSC.CLOCK_REALTIME" is compile + -- time known, so turn warnings off. + + pragma Warnings (Off); + + if SOSC.CLOCK_RT_Ada /= SOSC.CLOCK_REALTIME then + pragma Warnings (On); + + RT_T := RT_T - OS_Primitives.Monotonic_Clock + STPO.Monotonic_Clock; + end if; + + System.Tasking.Initialization.Defer_Abort + (System.Task_Primitives.Operations.Self); + Time_Enqueue (RT_T, D); + return True; +end System.Tasking.Async_Delays.Enqueue_Calendar; |