Floating point time is being stored as a float here, we can prevent precision loss by changing some of these to double during the lifetime of the function to get a more accurate result.
- Use fast data types where possible so the compiler can optimize for speed based on platform
- for example, 128 bits might be fastest on ARM
- good future-proofing
- Refactor GetTimeSinceStart() to be a bit faster
- multiplication is much faster than division
- Implement a RageTimer method to get the seconds value as a plain int, for the places which cast the seconds value to an int
- Changing from GetTimeSinceStartFast() to GetTimeSinceStart() where accuracy is important
- Changing from GetTimeSinceStart() to GetUsecsSinceStart() for timestamp diffs
- Adjust RageThreads to accomodate an unsigned timestamp value
- a constant for the maximum value of `uint_fast64_t` replaces `-1` to accommodate the change from signed to unsigned for the `locked_at` variable
- i have separate constants for `std::numeric_limits<std::uint_fast64_t>::max()` and `static_cast<std::uint_fast64_t>(-1)`, so the reader understands -1 represents an error code, though they evaluate to the same value, so i could remove one of the two
- Add two methods to calculate the MMSSMsMs / MMSSMsMsMs time value from usecs directly instead of inferring it from a seconds value, in RageUtil
- Use a similar counter/modulo based method for WheelNotifyIcon, similar to what i did for text_glow in NoteField in 2eeee03
- Make `g_iStartTime` static const for safety
Rename two timer functions:
GetUsecsSinceStart -> GetTimeSinceStartMicroseconds
GetMicrosecondsSinceStart -> GetSystemTimeAsMicroseconds
Remove std prefix from uint_fast64_t
- Remove checking for standard functions from the build system
- Prefix all invocations with std::
- Replace suffixed functions with unprefixed versions
- Include <cmath> in all files that use it and remove the global include
e.g. floorf(x) -> std::floor(x)
sukibaby