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657 | -- --
-- package Copyright (c) Dmitry A. Kazakov --
-- GLib.Spawn_Alt.Asynchronous Luebeck --
-- Implementation Spring, 2009 --
-- --
-- Last revision : 21:51 06 Jun 2019 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, 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 --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- As a special exception, if other files instantiate generics from --
-- this unit, or you link this unit with other files to produce an --
-- executable, this unit does not by itself cause the resulting --
-- executable to be covered by the GNU General Public License. This --
-- exception does not however invalidate any other reasons why the --
-- executable file might be covered by the GNU Public License. --
--____________________________________________________________________--
with Ada.Calendar; use Ada.Calendar;
with Ada.Exceptions; use Ada.Exceptions;
with Ada.IO_Exceptions; use Ada.IO_Exceptions;
with Glib.Messages; use Glib.Messages;
with GNAT.OS_Lib; use GNAT.OS_Lib;
with Gtk.Missed; use Gtk.Missed;
with System; use System;
with GNAT.Traceback.Symbolic;
with Interfaces.C.Strings;
with System.Address_To_Access_Conversions;
package body GLib.Spawn_Alt.Asynchronous is
function Where (Text : String) return String is
begin
return " in GLib.Spawn_Alt.Asynchronous." & Text;
end Where;
procedure Free is
new Ada.Unchecked_Deallocation (Reader, Reader_Ptr);
procedure Free is
new Ada.Unchecked_Deallocation (Writer, Writer_Ptr);
procedure Free (List : in out Chars_Ptr_Array_Ptr);
procedure On_Exit
( PID : GPid;
Status : GInt;
Data : Address
);
pragma Convention (C, On_Exit);
package Conversions is
new System.Address_To_Access_Conversions
( Asynchronous_Process'Class
);
use Conversions;
procedure Completed
( Process : in out Asynchronous_Process;
Status : GInt
) is
begin
Free (Process.ArgV);
Free (Process.EnvP);
end Completed;
function Copy (List : Chars_Ptr_Array) return Chars_Ptr_Array_Ptr is
Result : constant Chars_Ptr_Array_Ptr :=
new Chars_Ptr_Array (List'First..List'Last + 1);
begin
for Index in Result'Range loop
Result (Index) := New_Char_Array (Value (List (Index)));
end loop;
Result (Result'Last) := Interfaces.C.Strings.Null_Ptr;
return Result;
end Copy;
function Copy
( Name : UTF8_String;
List : Chars_Ptr_Array
) return Chars_Ptr_Array_Ptr is
Result : constant Chars_Ptr_Array_Ptr :=
new Chars_Ptr_Array (List'First..List'Last + 2);
begin
Result (List'First) := New_String (Name);
for Index in List'Range loop
Result (Index + 1) := New_Char_Array (Value (List (Index)));
end loop;
Result (Result'Last) := Interfaces.C.Strings.Null_Ptr;
return Result;
end Copy;
function Copy (List : GList) return Chars_Ptr_Array_Ptr is
Ptr : GList := List;
Count : Natural := 0;
begin
while Ptr /= Null_List loop
Count := Count + 1;
Ptr := Next (Ptr);
end loop;
declare
Result : constant Chars_Ptr_Array_Ptr :=
new Chars_Ptr_Array (1..Count + 1);
begin
Ptr := List;
for Index in 1..Count loop
Result (Index) := New_String (Get_Data (Ptr));
Ptr := Next (Ptr);
end loop;
Result (Result'Last) := Interfaces.C.Strings.Null_Ptr;
return Result;
end;
end Copy;
function Copy
( Name : UTF8_String;
List : GList
) return Chars_Ptr_Array_Ptr is
Ptr : GList := List;
Count : Natural := 0;
begin
while Ptr /= Null_List loop
Count := Count + 1;
Ptr := Next (Ptr);
end loop;
declare
Result : constant Chars_Ptr_Array_Ptr :=
new Chars_Ptr_Array (1..Count + 2);
begin
Result (1) := New_String (Name);
Ptr := List;
for Index in 2..Count + 1 loop
Result (Index) := New_String (Get_Data (Ptr));
Ptr := Next (Ptr);
end loop;
Result (Result'Last) := Interfaces.C.Strings.Null_Ptr;
return Result;
end;
end Copy;
procedure Error
( Process : in out Asynchronous_Process;
Data : UTF8_String
) is
begin
null;
end Error;
procedure Failed
( Process : in out Asynchronous_Process;
Error : GError
) is
begin
null;
end Failed;
procedure Finalize (Process : in out Asynchronous_Process) is
begin
select
Process.Status.Wait_All;
or delay 1.0;
end select;
if Process.Error /= null then
Error_Free (Process.Error);
Process.Error := null;
end if;
end Finalize;
procedure Free (List : in out Chars_Ptr_Array_Ptr) is
procedure Release is
new Ada.Unchecked_Deallocation
( Chars_Ptr_Array,
Chars_Ptr_Array_Ptr
);
begin
if List /= null then
for Index in List'Range loop
Free (List (Index));
end loop;
Release (List);
end if;
end Free;
function Get_Error (Process : Asynchronous_Process) return GError is
begin
return Process.Error;
end Get_Error;
function Get_State (Process : Asynchronous_Process)
return Process_State is
begin
return Process.Status.Get;
end Get_State;
function Get_Exit_Status (Process : Asynchronous_Process)
return GInt is
begin
return Process.Status.Get;
end Get_Exit_Status;
procedure Input
( Process : in out Asynchronous_Process;
Data : out UTF8_String;
Count : out Natural
) is
begin
Count := 0;
end Input;
procedure On_Exit
( PID : GPid;
Status : GInt;
Data : Address
) is
begin
To_Pointer (Data).Status.Set (Process_Completed, Status);
end On_Exit;
procedure Output
( Process : in out Asynchronous_Process;
Data : UTF8_String
) is
begin
null;
end Output;
protected body Process_Status is
function Completed_Tasks_Count return Natural is
begin
return Count;
end Completed_Tasks_Count;
function Get return Process_State is
begin
return State;
end Get;
function Get return GInt is
begin
return Status;
end Get;
procedure Set (State : Process_State) is
begin
if ( Process_Status.State = Process_Running
and then
State = Process_Completed
and then
Count < 3
) then
Count := Count + 1;
else
Process_Status.State := State;
Count := 0;
end if;
end Set;
procedure Set (State : Process_State; Status : GInt) is
begin
Process_Status.Status := Status;
Set (State);
end Set;
entry Wait_IO when State = Process_Running and then Count = 3 is
begin
null;
end Wait_IO;
entry Wait_All when State /= Process_Running is
begin
null;
end Wait_All;
end Process_Status;
task body Reader is
Buffer : UTF8_String (1..1024);
Byte : aliased Character;
Count : Natural := 0;
begin
begin
while 0 < Read (File_Descriptor (Pipe), Byte'Address, 1) loop
Count := Count + 1;
Buffer (Count) := Byte;
if ( Count = Buffer'Length
or else
Buffer (Count) = Character'Val (10)
)
then
if Pipe = Process.Standard_Output then
Output (Process.all, Buffer (1..Count));
else
Error (Process.all, Buffer (1..Count));
end if;
Count := 0;
end if;
end loop;
if Count > 0 then
if Pipe = Process.Standard_Output then
Output (Process.all, Buffer (1..Count));
else
Error (Process.all, Buffer (1..Count));
end if;
end if;
exception
when Error : others =>
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
( Exception_Message (Error)
& Where ("task Reader")
) );
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
GNAT.Traceback.Symbolic.Symbolic_Traceback (Error)
);
end;
Process.Status.Set (Process_Completed);
end Reader;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
Working_Directory : UTF8_String;
ArgV : Chars_Ptr_Array;
EnvP : Chars_Ptr_Array
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Process.EnvP := Copy (EnvP);
Start
( Process,
Async_With_Pipes
( Working_Directory => Working_Directory,
ArgV => Process.ArgV (1)'Access,
EnvP => Process.EnvP (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
Working_Directory : UTF8_String;
ArgV : GList;
EnvP : GList
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Process.EnvP := Copy (EnvP);
Start
( Process,
Async_With_Pipes
( Working_Directory => Working_Directory,
ArgV => Process.ArgV (1)'Access,
EnvP => Process.EnvP (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
Working_Directory : UTF8_String;
ArgV : Chars_Ptr_Array
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Start
( Process,
Async_With_Pipes
( Working_Directory => Working_Directory,
ArgV => Process.ArgV (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
Working_Directory : UTF8_String;
ArgV : GList
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Start
( Process,
Async_With_Pipes
( Working_Directory => Working_Directory,
ArgV => Process.ArgV (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
ArgV : Chars_Ptr_Array;
EnvP : Chars_Ptr_Array
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Process.EnvP := Copy (EnvP);
Start
( Process,
Async_With_Pipes
( ArgV => Process.ArgV (1)'Access,
EnvP => Process.EnvP (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
ArgV : GList;
EnvP : GList
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Process.EnvP := Copy (EnvP);
Start
( Process,
Async_With_Pipes
( ArgV => Process.ArgV (1)'Access,
EnvP => Process.EnvP (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
ArgV : Chars_Ptr_Array
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Start
( Process,
Async_With_Pipes
( ArgV => Process.ArgV (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Run
( Process : in out Asynchronous_Process;
Name : UTF8_String;
ArgV : GList
) is
begin
if Process.Status.Get = Process_Running then
raise Use_Error;
end if;
if Process.Error /= null then
Process.Status.Set (Process_Completed);
Error_Free (Process.Error);
Process.Error := null;
end if;
Process.ArgV := Copy (Name, ArgV);
Start
( Process,
Async_With_Pipes
( ArgV => Process.ArgV (1)'Access,
Flags => SPAWN_DO_NOT_REAP_CHILD or SPAWN_SEARCH_PATH
) );
end Run;
procedure Service_Exit (Process : in out Asynchronous_Process_Ptr) is
begin
Free (Process.Input_Writer);
Free (Process.Output_Reader);
Free (Process.Error_Reader);
Close (File_Descriptor (Process.Standard_Error));
Close (File_Descriptor (Process.Standard_Input));
Close (File_Descriptor (Process.Standard_Output));
Free (Process.ArgV);
Free (Process.EnvP);
Close_PID (Process.PID);
begin
Completed (Process.all, Process.Status.Get);
exception
when Error : others =>
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
( Exception_Message (Error)
& Where ("Service_Exit")
) );
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
GNAT.Traceback.Symbolic.Symbolic_Traceback (Error)
);
end;
Process.Status.Set (Process_Completed);
end Service_Exit;
procedure Start
( Process : in out Asynchronous_Process'Class;
Result : Async_Result
) is
begin
if Result.Running then
Process.Status.Set (Process_Running);
Process.PID := Result.PID;
Process.Standard_Input := Result.Standard_Input;
Process.Standard_Output := Result.Standard_Output;
Process.Standard_Error := Result.Standard_Error;
Process.Input_Writer :=
new Writer
( Process'Unchecked_Access,
Process.Standard_Input
);
Process.Output_Reader :=
new Reader
( Process'Unchecked_Access,
Process.Standard_Output
);
Process.Error_Reader :=
new Reader
( Process'Unchecked_Access,
Process.Standard_Error
);
Child_Watch_Add
( Process.PID,
On_Exit'Access,
Process'Address
);
else
Process.Error := Result.Error;
Process.Status.Set (Process_Failed_To_Start);
Free (Process.ArgV);
Free (Process.EnvP);
Failed (Process, Process.Error);
end if;
end Start;
procedure Wait
( Process : in out Asynchronous_Process;
Time_Out : Duration := Duration'Last
) is
begin
if Time_Out = Duration'Last then
Process.Status.Wait_All;
else
select
Process.Status.Wait_All;
or delay Time_Out;
raise Time_Error;
end select;
end if;
end Wait;
task body Writer is
Bytes : Integer;
Buffer : UTF8_String (1..1024*10);
Count : Natural;
begin
begin
loop
Input (Process.all, Buffer, Count);
exit when Count = 0;
Bytes :=
Write
( File_Descriptor (Pipe),
Buffer'Address,
Integer (Count)
);
exit when Bytes /= Integer (Count);
end loop;
exception
when Error : others =>
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
( Exception_Message (Error)
& Where ("task Writer")
) );
Log
( GtkAda_Contributions_Domain,
Log_Level_Critical,
GNAT.Traceback.Symbolic.Symbolic_Traceback (Error)
);
end;
Process.Status.Wait_IO;
Send (Service_Exit'Access, Process.all'Unchecked_Access);
end Writer;
end GLib.Spawn_Alt.Asynchronous;
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