- 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
Summary of changes
1) Fix issues in RageTimer and RageSoundPosMap
2) Calculate seconds from microseconds more accurately
3) Replace lrint(x) with static_cast<int>(x+0.5) for better performance
4) Replace C style casting with C++ style casting
5) Make important values 64-bit wide
6) Update RageUtil.cpp (timer conversion RStrings had some math which needed to be fixed after fixing RageTimer's math)
7) Ensure floating point math is done as floating point
8) Improve code commentary all around
9) Improve clarity and efficiency of RageSoundPosMap "return closest position" error logging
- 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