diff options
| author |  Abseil Team <absl-team@google.com> | 2022-09-26 18:43:11 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2022-09-26 18:44:06 -0700 |
| commit | df19c209961b44299aa047d7db0d3972d94a2d0b (patch) | |
| tree | 5289010d9a0f1afd914c7e0a22657acb573e1772 /absl/base/internal/cycleclock.h | |
| parent | 1cd889767e518d1bbb1bf8b226ee2c4dd3e85390 (diff) | |
Split configuration related to cycle clock into separate headers
PiperOrigin-RevId: 477043101
Change-Id: I009ea39ad61e7e78cdac51afc57a8ad5b4d8aa2d
Diffstat (limited to 'absl/base/internal/cycleclock.h')
| -rw-r--r-- | absl/base/internal/cycleclock.h | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/absl/base/internal/cycleclock.h b/absl/base/internal/cycleclock.h index 9704e388..cbfdf579 100644 --- a/absl/base/internal/cycleclock.h +++ b/absl/base/internal/cycleclock.h @@ -47,6 +47,7 @@ #include "absl/base/attributes.h" #include "absl/base/config.h" +#include "absl/base/internal/cycleclock_config.h" #include "absl/base/internal/unscaledcycleclock.h" namespace absl { @@ -76,25 +77,9 @@ class CycleClock { #if ABSL_USE_UNSCALED_CYCLECLOCK static CycleClockSourceFunc LoadCycleClockSource(); -#ifdef NDEBUG -#ifdef ABSL_INTERNAL_UNSCALED_CYCLECLOCK_FREQUENCY_IS_CPU_FREQUENCY - // Not debug mode and the UnscaledCycleClock frequency is the CPU - // frequency. Scale the CycleClock to prevent overflow if someone - // tries to represent the time as cycles since the Unix epoch. - static constexpr int32_t kShift = 1; -#else - // Not debug mode and the UnscaledCycleClock isn't operating at the - // raw CPU frequency. There is no need to do any scaling, so don't - // needlessly sacrifice precision. - static constexpr int32_t kShift = 0; -#endif -#else // NDEBUG - // In debug mode use a different shift to discourage depending on a - // particular shift value. - static constexpr int32_t kShift = 2; -#endif // NDEBUG + static constexpr int32_t kShift = kCycleClockShift; + static constexpr double kFrequencyScale = kCycleClockFrequencyScale; - static constexpr double kFrequencyScale = 1.0 / (1 << kShift); ABSL_CONST_INIT static std::atomic<CycleClockSourceFunc> cycle_clock_source_; #endif // ABSL_USE_UNSCALED_CYCLECLOC |