diff options
Diffstat (limited to 'src/mongo/util/system_tick_source.h')
| -rw-r--r-- | src/mongo/util/system_tick_source.h | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/src/mongo/util/system_tick_source.h b/src/mongo/util/system_tick_source.h index df59541fcee..360b38616f0 100644 --- a/src/mongo/util/system_tick_source.h +++ b/src/mongo/util/system_tick_source.h @@ -31,25 +31,14 @@ #include "mongo/util/tick_source.h" +#include <memory> + namespace mongo { -/** - * Tick source based on platform specific clock ticks. Should be of reasonably high - * performance. The maximum span measurable by the counter and convertible to microseconds - * is about 10 trillion ticks. As long as there are fewer than 100 ticks per nanosecond, - * timer durations of 2.5 years will be supported. Since a typical tick duration will be - * under 10 per nanosecond, if not below 1 per nanosecond, this should not be an issue. - */ -class SystemTickSource final : public TickSource { -public: - TickSource::Tick getTicks() override; +/** Tick source based on `std:::chrono::steady_clock`. Monotonic, cheap, and high-precision. */ +std::unique_ptr<TickSource> makeSystemTickSource(); - TickSource::Tick getTicksPerSecond() override; +/** Accesses a singleton instance made by `makeSystemTickSource`. Safe to call at any time. */ +TickSource* globalSystemTickSource(); - /** - * Gets the singleton instance of SystemTickSource. Should not be called before - * the global initializers are done. - */ - static SystemTickSource* get(); -}; } // namespace mongo |