I will probably need this again somewhere in the future: An exponential back-off implementation I used somewhere; probably room for improvement, but it works good enough.
It’s Delphi, but I’ve not seen practical implementations in C# either.
(the updated version thanks to Anders Melander).
–jeroen
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| function TryGetLocationLockWithExponentialBackOff: Boolean; | |
| const | |
| cBase = 2; | |
| cMaxWaitMilliSeconds = 1500; | |
| var | |
| lWaitMilliSeconds: integer; | |
| begin | |
| Result := True; | |
| lWaitMilliSeconds := cBase; | |
| while (not TryGetLocationLock) do | |
| begin | |
| if (lWaitMilliSeconds > cMaxWaitMilliSeconds) then | |
| Exit(False); | |
| Sleep(lWaitMilliSeconds); | |
| Inc(lWaitMilliSeconds, lWaitMilliSeconds); | |
| end; | |
| end; |
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| function TryGetLocationLockWithExponentialBackOff: Boolean; | |
| const | |
| cBase = 2; | |
| cMaxWaitMilliSeconds = 1500; | |
| var | |
| lIteration: Integer; | |
| lWaitMilliSeconds: Single; | |
| begin | |
| lIteration := 1; | |
| lWaitMilliSeconds := 0; | |
| while lWaitMilliSeconds < cMaxWaitMilliSeconds do | |
| begin | |
| Result := TryGetLocationLock; | |
| if Result then | |
| Exit; | |
| lWaitMilliSeconds := IntPower(cBase, lIteration); | |
| Inc(lIteration); | |
| Sleep(Round(lWaitMilliSeconds)); | |
| end; | |
| Result := TryGetLocationLock; | |
| end; |
The Wiert Corner - irregular stream of stuff 