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core_timing: Make GetGlobalTimeUs() return std::chrono::microseconds

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Enforces the time unit being returned and also allows using the standard
time utilities to manipulate it.
This commit is contained in:
Lioncash 2018-08-05 22:07:28 -04:00
parent c8e5c74092
commit a0c3a46aa9
4 changed files with 14 additions and 14 deletions
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13
src/core/perf_stats.cpp
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@ -40,22 +40,21 @@ void PerfStats::EndGameFrame() {
game_frames += 1;
}
PerfStats::Results PerfStats::GetAndResetStats(u64 current_system_time_us) {
PerfStats::Results PerfStats::GetAndResetStats(microseconds current_system_time_us) {
std::lock_guard<std::mutex> lock(object_mutex);
auto now = Clock::now();
const auto now = Clock::now();
// Walltime elapsed since stats were reset
auto interval = duration_cast<DoubleSecs>(now - reset_point).count();
const auto interval = duration_cast<DoubleSecs>(now - reset_point).count();
auto system_us_per_second =
static_cast<double>(current_system_time_us - reset_point_system_us) / interval;
const auto system_us_per_second = (current_system_time_us - reset_point_system_us) / interval;
Results results{};
results.system_fps = static_cast<double>(system_frames) / interval;
results.game_fps = static_cast<double>(game_frames) / interval;
results.frametime = duration_cast<DoubleSecs>(accumulated_frametime).count() /
static_cast<double>(system_frames);
results.emulation_speed = system_us_per_second / 1'000'000.0;
results.emulation_speed = system_us_per_second.count() / 1'000'000.0;
// Reset counters
reset_point = now;
@ -74,7 +73,7 @@ double PerfStats::GetLastFrameTimeScale() {
return duration_cast<DoubleSecs>(previous_frame_length).count() / FRAME_LENGTH;
}
void FrameLimiter::DoFrameLimiting(u64 current_system_time_us) {
void FrameLimiter::DoFrameLimiting(microseconds current_system_time_us) {
// Max lag caused by slow frames. Can be adjusted to compensate for too many slow frames. Higher
// values increase the time needed to recover and limit framerate again after spikes.
constexpr microseconds MAX_LAG_TIME_US = 25ms;