diff options
Diffstat (limited to 'platform/default/src/mbgl/util')
-rw-r--r-- | platform/default/src/mbgl/util/monotonic_timer.cpp | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/platform/default/src/mbgl/util/monotonic_timer.cpp b/platform/default/src/mbgl/util/monotonic_timer.cpp new file mode 100644 index 0000000000..43c2ce6717 --- /dev/null +++ b/platform/default/src/mbgl/util/monotonic_timer.cpp @@ -0,0 +1,24 @@ +#include <assert.h> +#include <chrono> +#include <mbgl/util/monotonic_timer.hpp> + +namespace mbgl { +namespace util { + +// Prefer high resolution timer if it is monotonic +template <typename T, std::enable_if_t<std::chrono::high_resolution_clock::is_steady, T>* = nullptr> +static T sample() { + return std::chrono::duration_cast<T>(std::chrono::high_resolution_clock::now().time_since_epoch()); +} + +template <typename T, std::enable_if_t<!std::chrono::high_resolution_clock::is_steady, T>* = nullptr> +static T sample() { + return std::chrono::duration_cast<T>(std::chrono::steady_clock::now().time_since_epoch()); +} + +std::chrono::duration<double> MonotonicTimer::now() { + return sample<std::chrono::duration<double>>(); +} + +} // namespace util +} // namespace mbgl
\ No newline at end of file |