| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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; |