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-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs 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.
-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_19_sink-b.vhd,v 1.2 2001-10-26 16:29:36 paw Exp $
-- $Revision: 1.2 $
--
-- ---------------------------------------------------------------------
library math;
architecture behavior of sink is
begin
token_consumer : process is
variable number_of_tokens_consumed : natural := 0;
variable life_time : real; -- in time_unit
variable sum_of_life_times : real := 0.0; -- in time_unit
variable sum_of_squares_of_life_times : real := 0.0; --in time_unit**2
use std.textio.all;
file info_file : text;
variable L : line;
use math.math_real.sqrt;
procedure write_summary is
variable mean_life_time : real
:= sum_of_life_times / real(number_of_tokens_consumed);
variable std_dev_of_life_times : real
:= sqrt ( ( sum_of_squares_of_life_times
- sum_of_life_times**2 / real(number_of_tokens_consumed) )
/ real( number_of_tokens_consumed - 1 ) );
begin
write(L, string'("Summary information for sink "));
write(L, name);
write(L, string'(" up to time "));
write(L, now, unit => time_unit);
writeline(info_file, L);
write(L, string'(" Number of tokens consumed = "));
write(L, natural(number_of_tokens_consumed));
writeline(info_file, L);
write(L, string'(" Mean life_time = "));
write(L, mean_life_time * time_unit, unit => time_unit);
writeline(info_file, L);
write(L, string'(" Standard deviation of life_times = "));
write(L, std_dev_of_life_times * time_unit, unit => time_unit);
writeline(info_file, L);
writeline(info_file, L);
end procedure write_summary;
procedure write_trace is
begin
write(L, string'("Sink "));
write(L, name);
write(L, string'(": at "));
write(L, now, unit => time_unit);
write(L, string'(" consumed "));
write(L, in_arc.token, time_unit);
writeline(info_file, L);
end procedure write_trace;
begin
file_open(info_file, info_file_name, write_mode);
loop
wait on info_detail'transaction, in_arc;
if info_detail'active and info_detail = summary then
write_summary;
end if;
if in_arc'event then
number_of_tokens_consumed := number_of_tokens_consumed + 1;
life_time := real( (now - in_arc.token.creation_time) / time_unit );
sum_of_life_times := sum_of_life_times + life_time;
sum_of_squares_of_life_times := sum_of_squares_of_life_times + life_time ** 2;
if info_detail = trace then
write_trace;
end if;
end if;
end loop;
end process token_consumer;
end architecture behavior;
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