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327 | with
Shell.Commands.Unsafe.Privy,
Ada.Containers.Indefinite_Vectors,
Ada.Containers.Hashed_Maps,
Ada.Exceptions;
procedure Shell.Commands.Spawn_Server
is
package Server_Action_Vectors is new Ada.Containers.Indefinite_Vectors (Positive, Server_Action);
protected New_Actions
is
procedure Add (Action : in Server_Action);
procedure Get (Action : out Server_Action);
private
Actions : Server_Action_Vectors.Vector;
end New_Actions;
protected
body New_Actions
is
procedure Add (Action : in Server_Action)
is
begin
Actions.Append (Action);
end Add;
procedure Get (Action : out Server_Action)
is
begin
if not Actions.Is_Empty
then
Action := Actions.First_Element;
Actions.Delete_First;
else
Action := (Nil, Null_Id);
end if;
end Get;
end New_Actions;
task New_Action_Fetcher
is
entry Start;
end New_Action_Fetcher;
task body New_Action_Fetcher
is
Input_Stream : aliased Pipe_Stream := Stream (Shell.Standard_Input);
begin
accept Start;
loop
declare
Action : constant Server_Action := Server_Action'Input (Input_Stream'Access);
begin
New_Actions.Add (Action);
exit when Action.Kind = Stop;
end;
end loop;
exception
when E : others =>
Log ("Unhandled error in New_Action_Fetcher.");
Log (Ada.Exceptions.Exception_Information (E));
end New_Action_Fetcher;
begin
Open_Log ("aShell_spawn_Server.log");
declare
use type Unsafe.Command;
package Id_Maps_of_Command is new Ada.Containers.Hashed_Maps (Key_Type => Command_Id,
Element_Type => Unsafe.Command,
Hash => Hash,
Equivalent_Keys => "=");
Command_Map : Id_Maps_of_Command.Map;
Output_Stream : aliased Pipe_Stream := Stream (Shell.Standard_Output);
Shutting_Down : Boolean := False;
begin
Log ("Starting Spawn Server");
New_Action_Fetcher.Start;
loop
Log ("");
Log ("looping");
begin
declare
use Shell.Commands.Unsafe;
Action : Server_Action;
begin
New_Actions.Get (Action);
case Action.Kind
is
when Nil =>
delay 0.02;
when New_Command =>
Log ("New_Command action.");
declare
The_Command : Unsafe.Command := Privy.To_Command (+Action.Command_Line);
begin
The_Command.Start (Input => Action.Command_Input.Element,
Accepts_Input => Action.Accepts_Input);
Log ("New Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Insert (Action.Id, The_Command);
end;
when New_Pipeline =>
Log ("New_Pipeline action.");
declare
use Shell.Commands.Unsafe.Privy;
The_Commands : Unsafe.Command_Array := Forge.To_Commands (+Action.Pipeline);
begin
Start (The_Commands,
Input => Action.Pipeline_Input.Element,
Pipeline => True);
Log ("New Pipeline: First command Id =>" & Action.Id'Image & " '" & (+Action.Pipeline) & "'");
for i in The_Commands'Range
loop
if i /= The_Commands'Last
then
Is_Within_A_Pipeline (The_Commands (i));
end if;
Command_Map.Insert (Action.Id, The_Commands (i));
Action.Id := Action.Id + 1;
end loop;
end;
when New_Input =>
Log ("New_Input action.");
declare
The_Command : constant Unsafe.Command := Command_Map.Element (Action.Id);
begin
The_Command.Send (Action.Data.Element);
Log ("New Input sent to Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
end;
when Kill =>
Log ("Kill action.");
declare
The_Command : Unsafe.Command := Command_Map.Element (Action.Id);
begin
The_Command.Kill;
Log ("Killed Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Replace (Action.Id, The_Command);
end;
when Interrupt =>
Log ("Interrupt action.");
declare
The_Command : Unsafe.Command := Command_Map.Element (Action.Id);
begin
The_Command.Interrupt;
Log ("Interrupted Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Replace (Action.Id, The_Command);
end;
when Pause =>
Log ("Pause action.");
declare
The_Command : Unsafe.Command := Command_Map.Element (Action.Id);
begin
The_Command.Pause;
Log ("Paused Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Replace (Action.Id, The_Command);
end;
when Resume =>
Log ("Resume action.");
declare
The_Command : Unsafe.Command := Command_Map.Element (Action.Id);
begin
The_Command.Resume;
Log ("Resumes Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Replace (Action.Id, The_Command);
end;
when Stop =>
Log ("Stop action.");
declare
use Shell.Commands.Unsafe.Privy;
The_Command : Unsafe.Command := Command_Map.Element (Action.Id);
begin
Stop (The_Command);
Log ("Stop Command:" & Action.Id'Image & " '" & Image (The_Command) & "'");
Command_Map.Replace (Action.Id, The_Command);
end;
when Shutdown =>
Log ("Shutdown action.");
Shutting_Down := True;
end case;
end;
declare
use Id_Maps_of_Command;
package Command_Id_Vectors is new Ada.Containers.Vectors (Positive, Command_Id);
Done_Commands : Command_Id_Vectors.Vector;
Cursor : Id_Maps_of_Command.Cursor := Command_Map.First;
begin
-- Send ongoing command results to the client.
--
while Has_Element (Cursor)
loop
declare
use Data_Holders,
Shell.Commands.Unsafe.Privy,
Shell.Commands.Unsafe;
Id : constant Command_Id := Key (Cursor);
The_Command : Unsafe.Command := Element (Cursor);
procedure Send_New_Results
is
begin
if not Is_Within_A_Pipeline (The_Command)
then
-- log ("Send new results for command: " & Image (The_Command));
declare
Output : constant Data := Privy.Output_Of (The_Command.Output_Pipe);
Errors : constant Data := Privy.Output_Of (The_Command. Error_Pipe);
begin
if not ( Output'Length = 0
and Errors'Length = 0)
then
Client_Action'Output (Output_Stream'Access,
(New_Outputs,
Id,
To_Holder (Output),
To_Holder (Errors)));
end if;
end;
end if;
end Send_New_Results;
begin
Send_New_Results; -- Send ongoing results.
if The_Command.Has_Terminated
then
Log ("Command: " & Id'Image & " has terminated. Normal exit: " & The_Command.Normal_Exit'Image);
Send_New_Results; -- Send any final results.
declare
Act : constant Client_Action := (Command_Done,
Id,
Normal_Exit => The_Command.Normal_Exit);
begin
Client_Action'Output (Output_Stream'Access, Act);
end;
Done_Commands.Append (Id);
end if;
end;
Next (Cursor);
end loop;
-- Rid completed commands.
--
for Each of Done_Commands
loop
Command_Map.Delete (Each);
end loop;
end;
exit when Shutting_Down
and Command_Map.Is_Empty;
if Command_Map.Is_Empty
then
delay 0.1;
end if;
end;
end loop;
declare
Act : constant Client_Action := (Server_Done, Null_Id);
begin
Client_Action'Output (Output_Stream'Access, Act);
end;
Log ("Ending Spawn Server");
end;
Close_Log;
exception
when E : others =>
Log ("Unhandled error in aShell_Spawn_Server.");
Log (Ada.Exceptions.Exception_Information (E));
Close_Log;
end Shell.Commands.Spawn_Server;
|