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(* Copyright (C) 1999-2006 Henry Cejtin, Matthew Fluet, Suresh
* Jagannathan, and Stephen Weeks.
* Copyright (C) 1997-2000 NEC Research Institute.
*
* MLton is released under a HPND-style license.
* See the file MLton-LICENSE for details.
*)
structure Timer: TIMER =
struct
structure SysUsr =
struct
datatype t = T of {sys: Time.time, usr: Time.time}
fun export (T r) = r
fun (T {sys, usr}) - (T {sys = s', usr = u'}) =
T {sys = Time.- (sys, s'),
usr = Time.- (usr, u')}
end
type cpu_timer = {gc: SysUsr.t, self: SysUsr.t}
fun startCPUTimer (): cpu_timer =
let
val {gc = {utime = gcu, stime = gcs, ...},
self = {utime = selfu, stime = selfs}, ...} =
MLtonRusage.rusage ()
in
{gc = SysUsr.T {sys = gcs, usr = gcu},
self = SysUsr.T {sys = selfs, usr = selfu}}
end
fun checkCPUTimes {gc, self} =
let
val {gc = g', self = s'} = startCPUTimer ()
val gc = SysUsr.- (g', gc)
val self = SysUsr.- (s', self)
in
{gc = SysUsr.export gc,
nongc = SysUsr.export (SysUsr.- (self, gc))}
end
fun checkCPUTimer timer =
let
val {nongc, gc} = checkCPUTimes timer
in
{sys = Time.+ (#sys gc, #sys nongc),
usr = Time.+ (#usr gc, #usr nongc)}
end
val totalCPUTimer =
let
val t = startCPUTimer ()
in
fn () => t
end
val checkGCTime = #usr o #gc o checkCPUTimes
type real_timer = Time.time
fun startRealTimer (): real_timer = Time.now ()
fun checkRealTimer (t: real_timer): Time.time =
Time.- (startRealTimer (), t)
val totalRealTimer =
let
val t = startRealTimer ()
in
fn () => t
end
end
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