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fbarresi / Sharp7

Nuget package for Sharp7
MIT License
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Environment.TickCount #15

Open loonwong opened 4 years ago

loonwong commented 4 years ago

Hello!

We are using an implementation for C# and I would like to draw your attention to the following code:

int Elapsed = Environment.TickCount;
...
Expired = Environment.TickCount - Elapsed > Timeout;

This is because Environment.TickCount returns values from Int32.MinValue to Int32.MaxValue. Therefore, if the system has been running for 24.9 days, the counter will turn negative and the expression Expired = Environment.TickCount-Elapsed > Timeout will return false for the next 24.9 days. ​ Instead of Environment.TickCount, I would suggest using a static instance of Stopwatch (which is run once) to get uptime milliseconds.

fbarresi commented 4 years ago

Hi!

I guess, you are referring to this line, right?

This method would cause a single transmission error if the TickCount overflows exactly while waiting for data and I think any application resilient enough will keep working anyway. Honestly I use sharp7 in many application that runs in high frequency polling over many years and I didn't get any problem at this point.

I understand the problem, I will fix it. Thank you for your suggestion.

Best regards,

Federico

Peter-B- commented 3 years ago

I don't think that this will cause an issue due to the way .net handles integer arithmetic.