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262 | ------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- Localization, Internationalization, Globalization for Ada --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2013-2020, Vadim Godunko <vgodunko@gmail.com> --
-- All rights reserved. --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions --
-- are met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in the --
-- documentation and/or other materials provided with the distribution. --
-- --
-- * Neither the name of the Vadim Godunko, IE nor the names of its --
-- contributors may be used to endorse or promote products derived from --
-- this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR --
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING --
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS --
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
-- $Revision: 5915 $ $Date: 2020-01-11 12:59:04 +0300 (Сб, 11 янв 2020) $
------------------------------------------------------------------------------
with Ada.Unchecked_Deallocation;
package body Matreshka.JSON_Types is
-----------------
-- Dereference --
-----------------
procedure Dereference (Self : in out Shared_JSON_Array_Access) is
procedure Free is
new Ada.Unchecked_Deallocation
(Shared_JSON_Array, Shared_JSON_Array_Access);
begin
if Self /= Empty_Shared_JSON_Array'Access
and then Matreshka.Atomics.Counters.Decrement (Self.Counter)
then
for Value of Self.Values loop
Dereference (Value);
end loop;
Free (Self);
else
Self := null;
end if;
end Dereference;
-----------------
-- Dereference --
-----------------
procedure Dereference (Self : in out Shared_JSON_Object_Access) is
procedure Free is
new Ada.Unchecked_Deallocation
(Shared_JSON_Object, Shared_JSON_Object_Access);
begin
if Self /= Empty_Shared_JSON_Object'Access
and then Matreshka.Atomics.Counters.Decrement (Self.Counter)
then
for Value of Self.Values loop
Dereference (Value);
end loop;
Free (Self);
else
Self := null;
end if;
end Dereference;
-----------------
-- Dereference --
-----------------
procedure Dereference (Self : in out Shared_JSON_Value_Access) is
procedure Free is
new Ada.Unchecked_Deallocation
(Shared_JSON_Value, Shared_JSON_Value_Access);
begin
if Self /= Empty_Shared_JSON_Value'Access
and then Self /= Null_Shared_JSON_Value'Access
and then Matreshka.Atomics.Counters.Decrement (Self.Counter)
then
case Self.Value.Kind is
when Empty_Value =>
null;
when Boolean_Value =>
null;
when Integer_Value =>
null;
when Float_Value =>
null;
when String_Value =>
Matreshka.Internals.Strings.Dereference (Self.Value.String_Value);
when Array_Value =>
Dereference (Self.Value.Array_Value);
when Object_Value =>
Dereference (Self.Value.Object_Value);
when Null_Value =>
null;
end case;
Free (Self);
else
Self := null;
end if;
end Dereference;
------------
-- Mutate --
------------
procedure Mutate (Self : in out not null Shared_JSON_Array_Access) is
Source : Shared_JSON_Array_Access := Self;
begin
if Self = Empty_Shared_JSON_Array'Access
or else not Matreshka.Atomics.Counters.Is_One (Self.Counter)
then
Self :=
new Shared_JSON_Array'(Counter => <>, Values => Source.Values);
-- Update reference counters for values.
for Value of Self.Values loop
Reference (Value);
end loop;
-- Release source shared object.
Dereference (Source);
end if;
end Mutate;
------------
-- Mutate --
------------
procedure Mutate (Self : in out not null Shared_JSON_Object_Access) is
Source : Shared_JSON_Object_Access := Self;
begin
if Self = Empty_Shared_JSON_Object'Access
or else not Matreshka.Atomics.Counters.Is_One (Self.Counter)
then
Self :=
new Shared_JSON_Object'(Counter => <>, Values => Source.Values);
-- Update reference counters for values.
for Value of Self.Values loop
Reference (Value);
end loop;
-- Release source shared object.
Dereference (Source);
end if;
end Mutate;
------------
-- Mutate --
------------
procedure Mutate (Self : in out not null Shared_JSON_Value_Access) is
begin
-- Mutate object: new shared object is allocated when reference counter
-- is greater than one, reference counter of original object is
-- decremented and original value is copied. Otherwise, shared object is
-- unchanged.
null;
end Mutate;
------------
-- Mutate --
------------
procedure Mutate
(Self : in out not null Shared_JSON_Value_Access;
Kind : Value_Kinds) is
begin
-- Mutate object: allocate new shared then reference counter is greater
-- than one, and decrement reference counter of original object. Value
-- of the object is reset to default value of specifid kind.
null;
end Mutate;
---------------
-- Reference --
---------------
procedure Reference (Self : not null Shared_JSON_Array_Access) is
begin
if Self /= Empty_Shared_JSON_Array'Access then
Matreshka.Atomics.Counters.Increment (Self.Counter);
end if;
end Reference;
---------------
-- Reference --
---------------
procedure Reference (Self : not null Shared_JSON_Object_Access) is
begin
if Self /= Empty_Shared_JSON_Object'Access then
Matreshka.Atomics.Counters.Increment (Self.Counter);
end if;
end Reference;
---------------
-- Reference --
---------------
procedure Reference (Self : not null Shared_JSON_Value_Access) is
begin
if Self /= Empty_Shared_JSON_Value'Access
and Self /= Null_Shared_JSON_Value'Access
then
Matreshka.Atomics.Counters.Increment (Self.Counter);
end if;
end Reference;
end Matreshka.JSON_Types;
|