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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT LIBRARY COMPONENTS --
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4 -- --
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5 -- ADA.CONTAINERS.BOUNDED_SYNCHRONIZED_QUEUES --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 2011-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- This specification is derived from the Ada Reference Manual for use with --
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12 -- GNAT. The copyright notice above, and the license provisions that follow --
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13 -- apply solely to the contents of the part following the private keyword. --
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14 -- --
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15 -- GNAT is free software; you can redistribute it and/or modify it under --
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16 -- terms of the GNU General Public License as published by the Free Soft- --
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17 -- ware Foundation; either version 3, or (at your option) any later ver- --
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18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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21 -- --
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22 -- As a special exception under Section 7 of GPL version 3, you are granted --
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23 -- additional permissions described in the GCC Runtime Library Exception, --
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24 -- version 3.1, as published by the Free Software Foundation. --
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25 -- --
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26 -- You should have received a copy of the GNU General Public License and --
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27 -- a copy of the GCC Runtime Library Exception along with this program; --
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28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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29 -- <http://www.gnu.org/licenses/>. --
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30 -- --
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31 -- This unit was originally developed by Matthew J Heaney. --
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32 ------------------------------------------------------------------------------
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33
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34 with System;
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35 with Ada.Containers.Synchronized_Queue_Interfaces;
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36
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37 generic
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38 with package Queue_Interfaces is
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39 new Ada.Containers.Synchronized_Queue_Interfaces (<>);
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40
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41 Default_Capacity : Count_Type;
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42 Default_Ceiling : System.Any_Priority := System.Priority'Last;
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43
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44 package Ada.Containers.Bounded_Synchronized_Queues is
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45 pragma Annotate (CodePeer, Skip_Analysis);
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46 pragma Preelaborate;
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47
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48 package Implementation is
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49
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50 -- All identifiers in this unit are implementation defined
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51
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52 pragma Implementation_Defined;
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53
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54 type List_Type (Capacity : Count_Type) is tagged limited private;
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55
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56 procedure Enqueue
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57 (List : in out List_Type;
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58 New_Item : Queue_Interfaces.Element_Type);
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59
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60 procedure Dequeue
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61 (List : in out List_Type;
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62 Element : out Queue_Interfaces.Element_Type);
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63
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64 function Length (List : List_Type) return Count_Type;
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65
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66 function Max_Length (List : List_Type) return Count_Type;
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67
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68 private
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69
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70 -- Need proper heap data structure here ???
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71
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72 type Element_Array is
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73 array (Count_Type range <>) of Queue_Interfaces.Element_Type;
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74
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75 type List_Type (Capacity : Count_Type) is tagged limited record
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76 First, Last : Count_Type := 0;
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77 Length : Count_Type := 0;
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78 Max_Length : Count_Type := 0;
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79 Elements : Element_Array (1 .. Capacity) := (others => <>);
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80 end record;
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81
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82 end Implementation;
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83
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84 protected type Queue
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85 (Capacity : Count_Type := Default_Capacity;
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86 Ceiling : System.Any_Priority := Default_Ceiling)
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87 with
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88 Priority => Ceiling
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89 is new Queue_Interfaces.Queue with
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90
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91 overriding entry Enqueue (New_Item : Queue_Interfaces.Element_Type);
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92
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93 overriding entry Dequeue (Element : out Queue_Interfaces.Element_Type);
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94
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95 overriding function Current_Use return Count_Type;
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96
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97 overriding function Peak_Use return Count_Type;
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98
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99 private
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100 List : Implementation.List_Type (Capacity);
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101 end Queue;
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102
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103 end Ada.Containers.Bounded_Synchronized_Queues;
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