Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-spsufi.adb @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | |
| children | 84e7813d76e9 |
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| 68:561a7518be6b | 111:04ced10e8804 |
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| 1 ------------------------------------------------------------------------------ | |
| 2 -- -- | |
| 3 -- GNAT COMPILER COMPONENTS -- | |
| 4 -- -- | |
| 5 -- SYSTEM.STORAGE_POOLS.SUBPOOLS.FINALIZATION -- | |
| 6 -- -- | |
| 7 -- B o d y -- | |
| 8 -- -- | |
| 9 -- Copyright (C) 2011-2017, Free Software Foundation, Inc. -- | |
| 10 -- -- | |
| 11 -- GNAT 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- -- | |
| 13 -- ware Foundation; either version 3, or (at your option) any later ver- -- | |
| 14 -- sion. GNAT 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. -- | |
| 17 -- -- | |
| 18 -- As a special exception under Section 7 of GPL version 3, you are granted -- | |
| 19 -- additional permissions described in the GCC Runtime Library Exception, -- | |
| 20 -- version 3.1, as published by the Free Software Foundation. -- | |
| 21 -- -- | |
| 22 -- You should have received a copy of the GNU General Public License and -- | |
| 23 -- a copy of the GCC Runtime Library Exception along with this program; -- | |
| 24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- | |
| 25 -- <http://www.gnu.org/licenses/>. -- | |
| 26 -- -- | |
| 27 -- GNAT was originally developed by the GNAT team at New York University. -- | |
| 28 -- Extensive contributions were provided by Ada Core Technologies Inc. -- | |
| 29 -- -- | |
| 30 ------------------------------------------------------------------------------ | |
| 31 | |
| 32 with Ada.Unchecked_Deallocation; | |
| 33 | |
| 34 with System.Finalization_Masters; use System.Finalization_Masters; | |
| 35 | |
| 36 package body System.Storage_Pools.Subpools.Finalization is | |
| 37 | |
| 38 ----------------------------- | |
| 39 -- Finalize_And_Deallocate -- | |
| 40 ----------------------------- | |
| 41 | |
| 42 procedure Finalize_And_Deallocate (Subpool : in out Subpool_Handle) is | |
| 43 procedure Free is new Ada.Unchecked_Deallocation (SP_Node, SP_Node_Ptr); | |
| 44 | |
| 45 begin | |
| 46 -- Do nothing if the subpool was never created or never used. The latter | |
| 47 -- case may arise with an array of subpool implementations. | |
| 48 | |
| 49 if Subpool = null | |
| 50 or else Subpool.Owner = null | |
| 51 or else Subpool.Node = null | |
| 52 then | |
| 53 return; | |
| 54 end if; | |
| 55 | |
| 56 -- Clean up all controlled objects chained on the subpool's master | |
| 57 | |
| 58 Finalize (Subpool.Master); | |
| 59 | |
| 60 -- Remove the subpool from its owner's list of subpools | |
| 61 | |
| 62 Detach (Subpool.Node); | |
| 63 | |
| 64 -- Destroy the associated doubly linked list node which was created in | |
| 65 -- Set_Pool_Of_Subpools. | |
| 66 | |
| 67 Free (Subpool.Node); | |
| 68 | |
| 69 -- Dispatch to the user-defined implementation of Deallocate_Subpool. It | |
| 70 -- is important to first set Subpool.Owner to null, because RM-13.11.5 | |
| 71 -- requires that "The subpool no longer belongs to any pool" BEFORE | |
| 72 -- calling Deallocate_Subpool. The actual dispatching call required is: | |
| 73 -- | |
| 74 -- Deallocate_Subpool(Pool_of_Subpool(Subpool).all, Subpool); | |
| 75 -- | |
| 76 -- but that can't be taken literally, because Pool_of_Subpool will | |
| 77 -- return null. | |
| 78 | |
| 79 declare | |
| 80 Owner : constant Any_Storage_Pool_With_Subpools_Ptr := Subpool.Owner; | |
| 81 begin | |
| 82 Subpool.Owner := null; | |
| 83 Deallocate_Subpool (Owner.all, Subpool); | |
| 84 end; | |
| 85 | |
| 86 Subpool := null; | |
| 87 end Finalize_And_Deallocate; | |
| 88 | |
| 89 end System.Storage_Pools.Subpools.Finalization; |