diff options
Diffstat (limited to 'src/mbgl/util/throttler.cpp')
-rw-r--r-- | src/mbgl/util/throttler.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/mbgl/util/throttler.cpp b/src/mbgl/util/throttler.cpp new file mode 100644 index 0000000000..910810ce2f --- /dev/null +++ b/src/mbgl/util/throttler.cpp @@ -0,0 +1,36 @@ +#include <mbgl/util/throttler.hpp> + +namespace mbgl { +namespace util { + +Throttler::Throttler(Duration frequency_, std::function<void()>&& function_) + : frequency(frequency_) + , function(std::move(function_)) + , pendingInvocation(false) + , lastInvocation(TimePoint::min()) +{} + +void Throttler::invoke() { + if (pendingInvocation) { + return; + } + + Duration timeToNextInvocation = lastInvocation == TimePoint::min() + ? Duration::zero() + : (lastInvocation + frequency) - Clock::now(); + + if (timeToNextInvocation <= Duration::zero()) { + lastInvocation = Clock::now(); + function(); + } else { + pendingInvocation = true; + timer.start(timeToNextInvocation, Duration::zero(), [this]{ + pendingInvocation = false; + lastInvocation = Clock::now(); + function(); + }); + } +} + +} // namespace util +} // namespace mbgl |