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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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4 -- --
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5 -- A D A . C A L E N D A R . D E L A Y S --
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6 -- --
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7 -- S p e c --
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8 -- --
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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10 -- --
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11 -- GNARL is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNARL was developed by the GNARL team at Florida State University. --
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28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This package implements Calendar.Time delays using protected objects
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33
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34 -- Note: the compiler generates direct calls to this interface, in the
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35 -- processing of time types.
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36
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37 package Ada.Calendar.Delays is
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38
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39 procedure Delay_For (D : Duration);
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40 -- Delay until an interval of length (at least) D seconds has passed, or
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41 -- the task is aborted to at least the current ATC nesting level. This is
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42 -- an abort completion point. The body of this procedure must perform all
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43 -- the processing required for an abort point.
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44
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45 procedure Delay_Until (T : Time);
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46 -- Delay until Clock has reached (at least) time T, or the task is aborted
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47 -- to at least the current ATC nesting level. The body of this procedure
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48 -- must perform all the processing required for an abort point.
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49
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50 function To_Duration (T : Time) return Duration;
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51 -- Convert Time to Duration elapsed since UNIX epoch
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52
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53 end Ada.Calendar.Delays;
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