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I'm looking to implement a simple timer mechanism in C++. The code should work in Windows and Linux. The resolution should be as precise as possible (at least millisecond accuracy). This will be used to simply track the passage of time, not to implement any kind of event-driven design. What is the best tool to accomplish this?
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I have seen this implemented a few times as closed-source in-house solutions .... which all resorted to
#ifdefsolutions around native Windows hi-res timers on the one hand and Linux kernel timers usingstruct timeval(seeman timeradd) on the other hand.You can abstract this and a few Open Source projects have done it -- the last one I looked at was the CoinOR class CoinTimer but there are surely more of them.
SDL2 has an excellent cross-platform high-resolution timer. If however you need sub-millisecond accuracy, I wrote a very small cross-platform timer library here. It is compatible with both C++03 and C++11/higher versions of C++.