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197 | with Ada.Exceptions;
with GNAT.IO; use GNAT.IO;
with Workers.Mutexes;
package body Workers.Once is
---------
-- Add --
---------
procedure Add (This : in out Pool; Job : Input) is
begin
This.Jobs.Add (Job);
end Add;
-----------------
-- Set_Parents --
-----------------
procedure Set_Parents (This : in out Pool) is
begin
for Worker of This.Workers loop
Worker.Set_Parent (This'Unchecked_Access);
-- No risks as the parent will wait for all tasks terminated to go
-- out of scope.
end loop;
end Set_Parents;
------------------
-- No_More_Jobs --
------------------
procedure No_More_Jobs (This : in out Pool) is
begin
This.Jobs.No_More_Jobs;
This.Jobs.Wait_For_All;
end No_More_Jobs;
-----------
-- Store --
-----------
protected body Store is
---------
-- Add --
---------
procedure Add (Job : Input) is
begin
if Done then
raise Program_Error with "Adding job after marking done";
end if;
Jobs.Append (Job);
Jobs_Created := Jobs_Created + 1;
end Add;
---------
-- Get --
---------
entry Get (Job : out Input_Lists.List)
when not Jobs.Is_Empty or else Done
is
begin
Busy := Busy + 1;
if Done and then Jobs.Is_Empty then
raise Die_Now;
elsif Early_Abort and then Exception_Identity (Error) /= Null_Id then
raise Die_Now;
end if;
Job.Clear;
Job.Append (Jobs.First_Element);
Jobs.Delete_First;
end Get;
-----------
-- Ready --
-----------
procedure Ready is
begin
Busy := Busy - 1;
end Ready;
----------------
-- Completion --
----------------
function Completion return Rate
is (Rate ((Float (Jobs_Created) - Float (Jobs.Length)) / Float (Jobs_Created)));
-------------
-- Is_Done --
-------------
function Is_Done return Boolean is (Done);
----------
-- Load --
----------
function Load return Rate is (Rate (Float (Busy) / Float (Size)));
------------------
-- No_More_Jobs --
------------------
procedure No_More_Jobs is
begin
Done := True;
end No_More_Jobs;
--------------
-- Checkout --
--------------
procedure Checkout is
begin
Ended := Ended + 1;
end Checkout;
------------------
-- Wait_For_All --
------------------
entry Wait_For_All when Ended = Size is
begin
if Exception_Identity (Error) /= Null_Id then
Reraise_Occurrence (Error);
end if;
end Wait_For_All;
-----------------
-- Store_Error --
-----------------
procedure Store_Error (E : Exception_Occurrence) is
begin
if Exception_Identity (Error) = Null_Id then
Save_Occurrence (Error, E);
end if;
end Store_Error;
end Store;
---------------
-- Activator --
---------------
task body Activator is
begin
for Worker of Parent.Workers loop
Worker.Set_Parent (Parent);
end loop;
end Activator;
------------
-- Worker --
------------
task body Worker is
Parent : Pool_Access;
Job : Input_Lists.List;
begin
accept Set_Parent (Parent : Pool_Access) do
Worker.Parent := Parent;
end;
loop
begin
Parent.Jobs.Get (Job);
Process (Job.Constant_Reference (Job.First));
Parent.Jobs.Ready;
exception
when Die_Now =>
Parent.Jobs.Ready;
exit;
when E : others =>
Parent.Jobs.Ready;
Parent.Jobs.Store_Error (E);
end;
end loop;
Parent.Jobs.Checkout;
exception
when E : others =>
Put_Line ("Worker: "
& Ada.Exceptions.Exception_Name (E) & ": "
& Ada.Exceptions.Exception_Message (E));
raise;
end Worker;
end Workers.Once;
|