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player-interfaces.ads
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player-interfaces.ads
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-- Root class for interfaces.
-- When extending these, each interface should provide its own Subscribe and
-- Unsubscribe. These should call, as a final step, this root implementation.
with Player.Client;
with Player.Types;
with Ada.Finalization;
with Interfaces;
use Interfaces;
package Player.Interfaces is
pragma Linker_Options ("-lm");
pragma Linker_Options ("-lplayerc");
pragma Elaborate_Body;
type Object is abstract tagged limited private;
procedure Create
(This : in out Object;
Conn : in Client.Connection_Type;
Index : in Natural := 0);
-- This must call the C native constructor.
-- Must, as first step, call this Create.
procedure Destroy (This : in out Object)
is abstract;
-- This must call the C native destructor.
-- Must also ensure that the handle is set to null.
-- Failure to do so will cause destructor misbehavior.
procedure Clear_Handle (This : in out Object);
function Get_Handle (This : in Object) return Types.Handle;
function "-" (This : in Object) return Types.Handle
renames Get_Handle;
procedure Set_Handle (This : in out Object; Handle : in Types.Handle);
procedure Subscribe (This : in out Object; Mode : in Access_Modes);
procedure Unsubscribe (This : in out Object);
function Get_Fresh (This : in Object) return C.Int;
procedure Set_Fresh (This : in out Object; Fresh : in C.Int);
private
type Object is abstract new Ada.Finalization.Limited_Controlled with record
Handle : Types.Handle;
Subscribed : Boolean := False;
end record;
procedure Finalize (This : in out Object);
pragma Inline (Clear_Handle,
Get_Handle,
Set_Handle,
Subscribe,
Unsubscribe);
end Player.Interfaces;