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 --                                                                          --
  10 --          Copyright (C) 1992-1998, Free Software Foundation, Inc.         --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
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  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
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  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University.       --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This package implements Calendar.Time delays using protected objects.
  36
  37 --  Note: the compiler generates direct calls to this interface, in the
  38 --  processing of time types.
  39
  40 package Ada.Calendar.Delays is
  41
  42    procedure Delay_For (D : Duration);
  43    --  Delay until an interval of length (at least) D seconds has passed,
  44    --  or the task is aborted to at least the current ATC nesting level.
  45    --  This is an abort completion point.
  46    --  The body of this procedure must perform all the processing
  47    --  required for an abortion point.
  48
  49    procedure Delay_Until (T : Time);
  50    --  Delay until Clock has reached (at least) time T,
  51    --  or the task is aborted to at least the current ATC nesting level.
  52    --  The body of this procedure must perform all the processing
  53    --  required for an abortion point.
  54
  55    function To_Duration (T : Time) return Duration;
  56
  57 end Ada.Calendar.Delays;