public static Action StartUpAPollingLoop(Func <TimeSpan> drawTimeSpanDesired, DDoit doit) => StartUpAPollingLoopWithForceUpdateCapability(drawTimeSpanDesired, doit).KillTheLoop;
public static PollingLoopAccess StartUpAPollingLoopWithForceUpdateCapability(Func <TimeSpan> drawTimeSpanDesired, DDoit doit)
{
var l = NewLockWithControl();
bool wantOut = false;
bool wantForceUpdate = false;
new Thread(
() =>
{
DDoit current = doit; // only one thread will muck with this.
while (true)
{
var timeStart = DateTime.Now;
if (
With(
l,
c =>
wantOut))
{
return;
}
var timeSpanDesired = drawTimeSpanDesired();
current = current();
for (; ;)
{
var timeEnd = DateTime.Now;
var timeSpanSoFar = timeEnd - timeStart;
if (wantForceUpdate)
{
wantForceUpdate = false;
break;
}
else if (timeSpanSoFar < timeSpanDesired)
{
l(c => c.Wait(timeSpanDesired - timeSpanSoFar));
}
else
{
break;
}
}
}
}).Start();
return
(new PollingLoopAccess(
killTheLoop:
() => l(
c =>
{
wantOut = true;
c.PulseAll();
}),
forceLoopUpdateAsap:
() => l(
c =>
{
wantForceUpdate = true;
c.PulseAll();
})));
}
