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\documentclass{article}
\usepackage{open-axiom}
\begin{document}
\title{\$SPAD/src/algebra axtimer.as}
\author{The Axiom Team}
\maketitle
\begin{abstract}
\end{abstract}
\eject
\tableofcontents
\eject
\section{License}
<<license>>=
--Copyright (c) 1991-2002, The Numerical ALgorithms Group Ltd.
--All rights reserved.
--
--Redistribution and use in source and binary forms, with or without
--modification, are permitted provided that the following conditions are
--met:
--
-- - Redistributions of source code must retain the above copyright
-- notice, this list of conditions and the following disclaimer.
--
-- - Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in
-- the documentation and/or other materials provided with the
-- distribution.
--
-- - Neither the name of The Numerical ALgorithms Group Ltd. nor the
-- names of its contributors may be used to endorse or promote products
-- derived from this software without specific prior written permission.
--
--THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
--IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
--TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
--PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
--OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
--EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
--PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
--PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
--LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
--NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
--SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
@
<<*>>=
<<license>>
--------------------------------------------------------------------------------
--
-- BasicMath: timer.as --- Objects for tracking time
--
--------------------------------------------------------------------------------
--
-- ToDo: Write so that start!(x) ; start!(x) ; stop!(x); stop!(x) works.
#include "axiom.as"
Z ==> Integer;
Duration ==> Record(hours: Z, mins: Z, seconds: Z, milliseconds: Z);
+++ Timer
+++ History: 22/5/94 Original version by MB.
+++ 9/4/97 [Peter Broadbery] incorporated into Basicmath.
+++ 7/8/97 [PAB] Hacked into axiom.
+++ Timer is a type whose elements are stopwatch timers, which can be used
+++ to time precisely various sections of code.
+++ The precision can be up to 1 millisecond but depends on the operating system.
+++ The times returned are CPU times used by the process that created the timer.
Timer: BasicType with {
HMS: Z -> Duration;
++ Returns (h, m, s, u) where n milliseconds is equal
++ to h hours, m minutes, s seconds and u milliseconds.
read: % -> Z;
++ Reads the timer t without stopping it.
++ Returns the total accumulated time in milliseconds by all
++ the start/stop cycles since t was created or last reset.
++ If t is running, the time since the last start is added in,
++ and t is not stopped or affected.
reset!: % -> %;
++ Resets the timer t to 0 and stops it if it is running.
++Returns the timer t after it is reset.
start!: % -> Z;
++ Starts or restarts t, without resetting it to 0,
++ It has no effect on t if it is already running.
++ Returns 0 if t was already running, the absolute time at which
++ the start/restart was done otherwise.
stop!: % -> Z;
++ Stops t without resetting it to 0.
++ It has no effect on t if it is not running.
++ Returns the elapsed time in milliseconds since the last time t
++ was restarted, 0 if t was not running.
timer: () -> %;
++ Creates a timer, set to 0 and stopped.
++ Returns the timer that has been created.
coerce: % -> OutputForm;
#if 0
gcTimer: () -> %;
++ Returns the system garbage collection timer.
++ Do not use for other purposes!
#endif
} == add {
-- time = total accumulated time since created or reset
-- start = absolute time of last start
-- running? = true if currently running, false if currently stopped
Rep ==> Record(time:Z, start:Z, running?:Boolean);
import {
BOOT_:_:GET_-INTERNAL_-RUN_-TIME: () -> Integer;
} from Foreign Lisp;
cpuTime(): Integer == BOOT_:_:GET_-INTERNAL_-RUN_-TIME();
import from Rep, Z, Boolean;
timer():% == per [0, 0, false];
read(t:%):Z == {
rec := rep t;
ans := rec.time;
if rec.running? then ans := ans + cpuTime() - rec.start;
ans
}
stop!(t:%):Z == {
local ans:Z;
rec := rep t;
if rec.running? then {
ans := cpuTime() - rec.start;
rec.time := rec.time + ans;
rec.running? := false
}
else ans := 0;
ans
}
start!(t:%):Z == {
local ans:Z;
rec := rep t;
if not(rec.running?) then {
rec.start := ans := cpuTime();
rec.running? := true;
}
else ans := 0;
ans
}
reset!(t:%):% == {
rec := rep t;
rec.time := rec.start := 0;
rec.running? := false;
t
}
HMS(m:Z): Duration == {
import from Record(quotient: Integer, remainder: Integer);
(h, m) := explode divide(m, 3600000);
(m, s) := explode divide(m, 60000);
(s, l) := explode divide(s, 1000);
[h, m, s, l]
}
#if 0
import {
gcTimer: () -> Pointer;
} from Foreign C;
gcTimer(): % == (gcTimer())@Pointer pretend %;
#endif
coerce(x: %): OutputForm == {
import from List OutputForm;
assign(name: String, val: OutputForm): OutputForm == {
import from Symbol;
blankSeparate [outputForm(name::Symbol), outputForm("="::Symbol), val];
}
state: Symbol := coerce(if rep(x).running? then "on" else "off");
bracket [outputForm("Timer:"::Symbol),
commaSeparate [assign("state", outputForm state),
assign("value", (read x)::OutputForm)]];
}
(a: %) = (b: %): Boolean == error "No equality for Timers";
}
@
\eject
\begin{thebibliography}{99}
\bibitem{1} nothing
\end{thebibliography}
\end{document}
|
