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authorAuke Kok <sofar@foo-projects.org>2016-01-23 23:06:26 -0800
committerShadowNinja <shadowninja@minetest.net>2016-01-29 00:58:08 -0500
commit4ac1e9bccbd0222ab779b3fc4d2144d60e1f2b49 (patch)
tree4c509943cda1bb0473961bcf58adf366e32bd2f6 /build/android/res/drawable-hdpi/irr_icon.png
parent860d70bd0e228ee542e3e559961bfc7e56888d77 (diff)
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Clocksource: use a better clock if available.
clock_gettime() is a far better clock than gettimeofday(). Even better than clock_gettime() is that you can select either CLOCK_MONOTONIC, or even CLOCK_MONOTONIC_RAW. These clocks offer high precision time. And the _RAW variant will never roll back due to NTP drift or daylight savings, or otherwise. I've adjusted this code to select the right clock method auto- matically based on what's available in the OS. This means that if you're running a very old linux version, MacOS or other, you will automatically get the best clocksource available. I've tested all Linux clocksources by selectively compiling and running a 10k+ timer test suite. In all cases I confirmed that the 3 POSIX Linux clocksources worked properly, and were selected properly. I've modified the OS X compile path to use the high-res clock source for all time functions, but I can't confirm it works or that it compiles. As for WIN32, I confirmed that the used clocksource is indeed a Monotonic clocksource, so good news: that code section appears to be exactly what it should be.
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