/usr/share/ada/adainclude/gtkada/glib-cancellable.adb is in libgtkada16.1.0-dev 17.0.2017-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2000-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- --
-- --
-- --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
------------------------------------------------------------------------------
pragma Style_Checks (Off);
pragma Warnings (Off, "*is already use-visible*");
with Ada.Unchecked_Conversion;
with Glib.Type_Conversion_Hooks; use Glib.Type_Conversion_Hooks;
with Glib.Values; use Glib.Values;
with Gtk.Arguments; use Gtk.Arguments;
with Gtkada.Bindings; use Gtkada.Bindings;
package body Glib.Cancellable is
function C_G_Cancellable_Connect
(Self : System.Address;
Callback : System.Address;
Data : System.Address;
Data_Destroy_Func : Glib.G_Destroy_Notify_Address) return Gulong;
pragma Import (C, C_G_Cancellable_Connect, "g_cancellable_connect");
-- Convenience function to connect to the
-- Glib.Cancellable.Gcancellable::cancelled signal. Also handles the race
-- condition that may happen if the cancellable is cancelled right before
-- connecting.
-- Callback is called at most once, either directly at the time of the
-- connect if Cancellable is already cancelled, or when Cancellable is
-- cancelled in some thread.
-- Data_Destroy_Func will be called when the handler is disconnected, or
-- immediately if the cancellable is already cancelled.
-- See Glib.Cancellable.Gcancellable::cancelled for details on how to use
-- this.
-- Since GLib 2.40, the lock protecting Cancellable is not held when
-- Callback is invoked. This lifts a restriction in place for earlier GLib
-- versions which now makes it easier to write cleanup code that
-- unconditionally invokes e.g. Glib.Cancellable.Cancel.
-- Since: gtk+ 2.22
-- "callback": The Gcallback to connect.
-- "data": Data to pass to Callback.
-- "data_destroy_func": Free function for Data or null.
function To_Gcallback is new Ada.Unchecked_Conversion
(System.Address, Gcallback);
function To_Address is new Ada.Unchecked_Conversion
(Gcallback, System.Address);
procedure Internal_Gcallback (Data : System.Address);
pragma Convention (C, Internal_Gcallback);
------------------------
-- Internal_Gcallback --
------------------------
procedure Internal_Gcallback (Data : System.Address) is
Func : constant Gcallback := To_Gcallback (Data);
begin
Func.all;
end Internal_Gcallback;
package Type_Conversion_Gcancellable is new Glib.Type_Conversion_Hooks.Hook_Registrator
(Get_Type'Access, Gcancellable_Record);
pragma Unreferenced (Type_Conversion_Gcancellable);
-----------
-- G_New --
-----------
procedure G_New (Self : out Gcancellable) is
begin
Self := new Gcancellable_Record;
Glib.Cancellable.Initialize (Self);
end G_New;
----------------------
-- Gcancellable_New --
----------------------
function Gcancellable_New return Gcancellable is
Self : constant Gcancellable := new Gcancellable_Record;
begin
Glib.Cancellable.Initialize (Self);
return Self;
end Gcancellable_New;
----------------
-- Initialize --
----------------
procedure Initialize (Self : not null access Gcancellable_Record'Class) is
function Internal return System.Address;
pragma Import (C, Internal, "g_cancellable_new");
begin
if not Self.Is_Created then
Set_Object (Self, Internal);
end if;
end Initialize;
------------
-- Cancel --
------------
procedure Cancel (Self : not null access Gcancellable_Record) is
procedure Internal (Self : System.Address);
pragma Import (C, Internal, "g_cancellable_cancel");
begin
Internal (Get_Object (Self));
end Cancel;
-------------
-- Connect --
-------------
function Connect
(Self : not null access Gcancellable_Record;
Callback : Gcallback;
Data_Destroy_Func : Glib.G_Destroy_Notify_Address) return Gulong
is
begin
if Callback = null then
return C_G_Cancellable_Connect (Get_Object (Self), System.Null_Address, System.Null_Address, Data_Destroy_Func);
else
return C_G_Cancellable_Connect (Get_Object (Self), Internal_Gcallback'Address, To_Address (Callback), Data_Destroy_Func);
end if;
end Connect;
package body Connect_User_Data is
package Users is new Glib.Object.User_Data_Closure
(User_Data_Type, Destroy);
function To_Gcallback is new Ada.Unchecked_Conversion
(System.Address, Gcallback);
function To_Address is new Ada.Unchecked_Conversion
(Gcallback, System.Address);
procedure Internal_Cb (Data : System.Address);
pragma Convention (C, Internal_Cb);
-- The type used for callback functions in structure definitions and
-- function signatures. This doesn't mean that all callback functions
-- must take no parameters and return void. The required signature of a
-- callback function is determined by the context in which is used (e.g.
-- the signal to which it is connected). Use G_CALLBACK to cast the
-- callback function to a Gcallback.
-------------
-- Connect --
-------------
function Connect
(Self : not null access Glib.Cancellable.Gcancellable_Record'Class;
Callback : Gcallback;
Data : User_Data_Type;
Data_Destroy_Func : Glib.G_Destroy_Notify_Address) return Gulong
is
D : System.Address;
begin
if Callback = null then
return C_G_Cancellable_Connect (Get_Object (Self), System.Null_Address, System.Null_Address, Data_Destroy_Func);
else
D := Users.Build (To_Address (Callback), Data);
return C_G_Cancellable_Connect (Get_Object (Self), Internal_Cb'Address, D, Data_Destroy_Func);
end if;
end Connect;
-----------------
-- Internal_Cb --
-----------------
procedure Internal_Cb (Data : System.Address) is
D : constant Users.Internal_Data_Access := Users.Convert (Data);
begin
To_Gcallback (D.Func) (D.Data.all);
end Internal_Cb;
end Connect_User_Data;
----------------
-- Disconnect --
----------------
procedure Disconnect
(Self : not null access Gcancellable_Record;
Handler_Id : Gulong)
is
procedure Internal (Self : System.Address; Handler_Id : Gulong);
pragma Import (C, Internal, "g_cancellable_disconnect");
begin
Internal (Get_Object (Self), Handler_Id);
end Disconnect;
------------
-- Get_Fd --
------------
function Get_Fd (Self : not null access Gcancellable_Record) return Gint is
function Internal (Self : System.Address) return Gint;
pragma Import (C, Internal, "g_cancellable_get_fd");
begin
return Internal (Get_Object (Self));
end Get_Fd;
------------------
-- Is_Cancelled --
------------------
function Is_Cancelled
(Self : not null access Gcancellable_Record) return Boolean
is
function Internal (Self : System.Address) return Glib.Gboolean;
pragma Import (C, Internal, "g_cancellable_is_cancelled");
begin
return Internal (Get_Object (Self)) /= 0;
end Is_Cancelled;
-----------------
-- Pop_Current --
-----------------
procedure Pop_Current (Self : not null access Gcancellable_Record) is
procedure Internal (Self : System.Address);
pragma Import (C, Internal, "g_cancellable_pop_current");
begin
Internal (Get_Object (Self));
end Pop_Current;
------------------
-- Push_Current --
------------------
procedure Push_Current (Self : not null access Gcancellable_Record) is
procedure Internal (Self : System.Address);
pragma Import (C, Internal, "g_cancellable_push_current");
begin
Internal (Get_Object (Self));
end Push_Current;
----------------
-- Release_Fd --
----------------
procedure Release_Fd (Self : not null access Gcancellable_Record) is
procedure Internal (Self : System.Address);
pragma Import (C, Internal, "g_cancellable_release_fd");
begin
Internal (Get_Object (Self));
end Release_Fd;
-----------
-- Reset --
-----------
procedure Reset (Self : not null access Gcancellable_Record) is
procedure Internal (Self : System.Address);
pragma Import (C, Internal, "g_cancellable_reset");
begin
Internal (Get_Object (Self));
end Reset;
----------------------------
-- Set_Error_If_Cancelled --
----------------------------
function Set_Error_If_Cancelled
(Self : not null access Gcancellable_Record) return Boolean
is
function Internal (Self : System.Address) return Glib.Gboolean;
pragma Import (C, Internal, "g_cancellable_set_error_if_cancelled");
begin
return Internal (Get_Object (Self)) /= 0;
end Set_Error_If_Cancelled;
----------------
-- Source_New --
----------------
function Source_New
(Self : not null access Gcancellable_Record) return Glib.Main.G_Source
is
function Internal (Self : System.Address) return Glib.Main.G_Source;
pragma Import (C, Internal, "g_cancellable_source_new");
begin
return Internal (Get_Object (Self));
end Source_New;
-----------------
-- Get_Current --
-----------------
function Get_Current return Gcancellable is
function Internal return System.Address;
pragma Import (C, Internal, "g_cancellable_get_current");
Stub_Gcancellable : Gcancellable_Record;
begin
return Glib.Cancellable.Gcancellable (Get_User_Data (Internal, Stub_Gcancellable));
end Get_Current;
use type System.Address;
function Cb_To_Address is new Ada.Unchecked_Conversion
(Cb_Gcancellable_Void, System.Address);
function Address_To_Cb is new Ada.Unchecked_Conversion
(System.Address, Cb_Gcancellable_Void);
function Cb_To_Address is new Ada.Unchecked_Conversion
(Cb_GObject_Void, System.Address);
function Address_To_Cb is new Ada.Unchecked_Conversion
(System.Address, Cb_GObject_Void);
procedure Connect
(Object : access Gcancellable_Record'Class;
C_Name : Glib.Signal_Name;
Handler : Cb_Gcancellable_Void;
After : Boolean);
procedure Connect_Slot
(Object : access Gcancellable_Record'Class;
C_Name : Glib.Signal_Name;
Handler : Cb_GObject_Void;
After : Boolean;
Slot : access Glib.Object.GObject_Record'Class := null);
procedure Marsh_GObject_Void
(Closure : GClosure;
Return_Value : Glib.Values.GValue;
N_Params : Glib.Guint;
Params : Glib.Values.C_GValues;
Invocation_Hint : System.Address;
User_Data : System.Address);
pragma Convention (C, Marsh_GObject_Void);
procedure Marsh_Gcancellable_Void
(Closure : GClosure;
Return_Value : Glib.Values.GValue;
N_Params : Glib.Guint;
Params : Glib.Values.C_GValues;
Invocation_Hint : System.Address;
User_Data : System.Address);
pragma Convention (C, Marsh_Gcancellable_Void);
-------------
-- Connect --
-------------
procedure Connect
(Object : access Gcancellable_Record'Class;
C_Name : Glib.Signal_Name;
Handler : Cb_Gcancellable_Void;
After : Boolean)
is
begin
Unchecked_Do_Signal_Connect
(Object => Object,
C_Name => C_Name,
Marshaller => Marsh_Gcancellable_Void'Access,
Handler => Cb_To_Address (Handler),-- Set in the closure
After => After);
end Connect;
------------------
-- Connect_Slot --
------------------
procedure Connect_Slot
(Object : access Gcancellable_Record'Class;
C_Name : Glib.Signal_Name;
Handler : Cb_GObject_Void;
After : Boolean;
Slot : access Glib.Object.GObject_Record'Class := null)
is
begin
Unchecked_Do_Signal_Connect
(Object => Object,
C_Name => C_Name,
Marshaller => Marsh_GObject_Void'Access,
Handler => Cb_To_Address (Handler),-- Set in the closure
Slot_Object => Slot,
After => After);
end Connect_Slot;
------------------------
-- Marsh_GObject_Void --
------------------------
procedure Marsh_GObject_Void
(Closure : GClosure;
Return_Value : Glib.Values.GValue;
N_Params : Glib.Guint;
Params : Glib.Values.C_GValues;
Invocation_Hint : System.Address;
User_Data : System.Address)
is
pragma Unreferenced (Return_Value, N_Params, Params, Invocation_Hint, User_Data);
H : constant Cb_GObject_Void := Address_To_Cb (Get_Callback (Closure));
Obj : constant Glib.Object.GObject := Glib.Object.Convert (Get_Data (Closure));
begin
H (Obj);
exception when E : others => Process_Exception (E);
end Marsh_GObject_Void;
-----------------------------
-- Marsh_Gcancellable_Void --
-----------------------------
procedure Marsh_Gcancellable_Void
(Closure : GClosure;
Return_Value : Glib.Values.GValue;
N_Params : Glib.Guint;
Params : Glib.Values.C_GValues;
Invocation_Hint : System.Address;
User_Data : System.Address)
is
pragma Unreferenced (Return_Value, N_Params, Invocation_Hint, User_Data);
H : constant Cb_Gcancellable_Void := Address_To_Cb (Get_Callback (Closure));
Obj : constant Gcancellable := Gcancellable (Unchecked_To_Object (Params, 0));
begin
H (Obj);
exception when E : others => Process_Exception (E);
end Marsh_Gcancellable_Void;
------------------
-- On_Cancelled --
------------------
procedure On_Cancelled
(Self : not null access Gcancellable_Record;
Call : Cb_Gcancellable_Void;
After : Boolean := False)
is
begin
Connect (Self, "cancelled" & ASCII.NUL, Call, After);
end On_Cancelled;
------------------
-- On_Cancelled --
------------------
procedure On_Cancelled
(Self : not null access Gcancellable_Record;
Call : Cb_GObject_Void;
Slot : not null access Glib.Object.GObject_Record'Class;
After : Boolean := False)
is
begin
Connect_Slot (Self, "cancelled" & ASCII.NUL, Call, After, Slot);
end On_Cancelled;
end Glib.Cancellable;
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