Data.Metrics.Counter

Description

An incrementing and decrementing counter metric

import Data.Metrics.Counter

main :: IO ()
main = do
  c <- counter
  increment c
  x <- value c
  print $ x == 1

Synopsis

Documentation

A basic atomic counter.

Instances details

(MonadBase b m, PrimMonad b) => Clear b m (Counter b) Source #
Instance details Defined in Data.Metrics.Counter Methods clear :: Counter b -> m () Source #
(MonadBase b m, PrimMonad b) => Count b m (Counter b) Source #
Instance details Defined in Data.Metrics.Counter Methods count :: Counter b -> m Int Source #
(MonadBase b m, PrimMonad b) => Set b m (Counter b) Int Source #
Instance details Defined in Data.Metrics.Counter Methods set :: Counter b -> Int -> m () Source #
(MonadBase b m, PrimMonad b) => Value b m (Counter b) Int Source #
Instance details Defined in Data.Metrics.Counter Methods value :: Counter b -> m Int Source #
Register (Counter IO) Source #
Instance details Defined in Data.Metrics.Registry Methods register :: MetricRegistry IO -> Text -> IO (Counter IO) -> IO (Maybe (Counter IO)) Source #

counter :: forall (b :: Type -> Type) m. (MonadBase b m, PrimMonad b) => m (Counter b) Source #

Create a new counter.

Bump up a counter by 1.

Add an arbitrary amount to a counter.

Decrease the value of a counter by 1.

Subtract an arbitrary amount from a counter.