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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S Y S T E M . P O O L _ G L O B A L --
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6 -- --
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7 -- S p e c --
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8 -- --
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145
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT 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 -- GNAT was originally developed by the GNAT team at New York 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 -- Storage pool corresponding to default global storage pool used for types
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33 -- for which no storage pool is specified.
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34
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35 with System;
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36 with System.Storage_Pools;
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37 with System.Storage_Elements;
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38
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39 package System.Pool_Global is
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40 pragma Elaborate_Body;
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41 -- Needed to ensure that library routines can execute allocators
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42
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43 -- Allocation strategy:
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44
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45 -- Call to malloc/free for each Allocate/Deallocate
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46 -- No user specifiable size
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47 -- No automatic reclaim
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48 -- Minimal overhead
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49
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50 -- Pool simulating the allocation/deallocation strategy used by the
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51 -- compiler for access types globally declared.
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52
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53 type Unbounded_No_Reclaim_Pool is new
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54 System.Storage_Pools.Root_Storage_Pool with null record;
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55
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56 overriding function Storage_Size
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57 (Pool : Unbounded_No_Reclaim_Pool)
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58 return System.Storage_Elements.Storage_Count;
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59
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60 overriding procedure Allocate
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61 (Pool : in out Unbounded_No_Reclaim_Pool;
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62 Address : out System.Address;
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63 Storage_Size : System.Storage_Elements.Storage_Count;
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64 Alignment : System.Storage_Elements.Storage_Count);
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65
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66 overriding procedure Deallocate
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67 (Pool : in out Unbounded_No_Reclaim_Pool;
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68 Address : System.Address;
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69 Storage_Size : System.Storage_Elements.Storage_Count;
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70 Alignment : System.Storage_Elements.Storage_Count);
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71
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72 -- Pool object used by the compiler when implicit Storage Pool objects are
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73 -- explicitly referred to. For instance when writing something like:
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74 -- for T'Storage_Pool use Q'Storage_Pool;
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75 -- and Q'Storage_Pool hasn't been defined explicitly.
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76
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77 Global_Pool_Object : aliased Unbounded_No_Reclaim_Pool;
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78
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79 end System.Pool_Global;
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