gcc/ada/a-caldel.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --                   A D A . C A L E N D A R . D E L A Y S                  --
   6 --                                                                          --
   7 --                                  S p e c                                 --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2013, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNARL was developed by the GNARL team at Florida State University.       --
  28 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package implements Calendar.Time delays using protected objects
  33
  34 --  Note: the compiler generates direct calls to this interface, in the
  35 --  processing of time types.
  36
  37 package Ada.Calendar.Delays is
  38
  39    procedure Delay_For (D : Duration);
  40    --  Delay until an interval of length (at least) D seconds has passed, or
  41    --  the task is aborted to at least the current ATC nesting level. This is
  42    --  an abort completion point. The body of this procedure must perform all
  43    --  the processing required for an abort point.
  44
  45    procedure Delay_Until (T : Time);
  46    --  Delay until Clock has reached (at least) time T, or the task is aborted
  47    --  to at least the current ATC nesting level. The body of this procedure
  48    --  must perform all the processing required for an abort point.
  49
  50    function To_Duration (T : Time) return Duration;
  51    --  Convert Time to Duration elapsed since UNIX epoch
  52
  53 end Ada.Calendar.Delays;