gcc/ada/a-caldel.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA 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) 1992-2005, 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- --
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  14 -- sion. GNARL 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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
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  20 -- MA 02111-1307, USA.                                                      --
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  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This package implements Calendar.Time delays using protected objects.
  35
  36 --  Note: the compiler generates direct calls to this interface, in the
  37 --  processing of time types.
  38
  39 package Ada.Calendar.Delays is
  40
  41    procedure Delay_For (D : Duration);
  42    --  Delay until an interval of length (at least) D seconds has passed, or
  43    --  the task is aborted to at least the current ATC nesting level. This is
  44    --  an abort completion point. The body of this procedure must perform all
  45    --  the processing required for an abort point.
  46
  47    procedure Delay_Until (T : Time);
  48    --  Delay until Clock has reached (at least) time T, or the task is aborted
  49    --  to at least the current ATC nesting level. The body of this procedure
  50    --  must perform all the processing required for an abort point.
  51
  52    function To_Duration (T : Time) return Duration;
  53    --  Convert Time to Duration
  54
  55 end Ada.Calendar.Delays;