Reworking mkDebounce

.github/workflows/tests.yml

@@ -21,20 +21,17 @@ jobs:
           - "--resolver lts-21 --stack-yaml stack-lts-21.yaml"
           - "--resolver lts-20 --stack-yaml stack-lts-20.yaml"
           - "--resolver lts-19 --stack-yaml stack-lts-19.yaml"
-          - "--resolver lts-18 --stack-yaml stack-lts-18.yaml"
         exclude:
           - os: "macos-latest"
             args: "--resolver lts-19 --stack-yaml stack-lts-19.yaml"
-          - os: "macos-latest"
-            args: "--resolver lts-18 --stack-yaml stack-lts-18.yaml"
 
     steps:
       - name: Clone project
         uses: actions/checkout@v4
 
       # Not sure how to have GHC not setup twice
       # Something with settings "ghc-version"?
-      # ["9.8", "9.6", "9.4", "9.2", "9.0", "8.10"]
+      # ["9.8", "9.6", "9.4", "9.2", "9.0"]
       - uses: haskell-actions/setup@v2
         name: Setup Haskell Stack
         with:

auto-update/ChangeLog.md

@@ -1,5 +1,15 @@
 # ChangeLog for auto-update
 
+## 0.2.3
+
+* [#996](https://github.com/yesodweb/wai/pull/996):
+  Refactored the `Control.Debounce` logic to not leak threads.
+* [#996](https://github.com/yesodweb/wai/pull/996):
+  Added extra `DebounceEdge` options for different types of debouncing.
+  * `LeadingMute`: Action on first trigger, and ignore any triggers during cooldown
+  * `TrailingDelay`: First trigger starts cooldown, and
+    triggers during cooldown extend the cooldown. Action when cooldown expires.
+
 ## 0.2.2
 
 * NewAPI: updateThreadName, reaperThreadName, debounceThreadName:
@@ -14,19 +24,19 @@
 
 * Creating Reaper.Internal to export Reaper constructor.
 * Hiding Reaper constructor.
-* Add `reaperModify` to the `Reaper` API, allowing workload modification outside
+* [#985](https://github.com/yesodweb/wai/pull/985):
+  Add `reaperModify` to the `Reaper` API, allowing workload modification outside
   of the main `reaperAction` loop.
-  [#985](https://github.com/yesodweb/wai/pull/985)
 
 ## 0.1.6
 
-* Add control of activation on leading vs. trailing edges for Control.Debounce
-  [#756](https://github.com/yesodweb/wai/pull/756)
+* [#756](https://github.com/yesodweb/wai/pull/756):
+  Add control of activation on leading vs. trailing edges for Control.Debounce
 
 ## 0.1.5
 
-* Using the Strict and StrictData language extensions for GHC >8.
-  [#752](https://github.com/yesodweb/wai/pull/752)
+* [#752](https://github.com/yesodweb/wai/pull/752):
+  Using the Strict and StrictData language extensions for GHC >8.
 
 ## 0.1.4.1
 

auto-update/Control/AutoUpdate.hs

@@ -115,6 +115,11 @@ data UpdateSettings a = UpdateSettings
     --
     -- @since 0.1.0
     , updateThreadName :: String
+    -- ^ Label of the thread being forked.
+    --
+    -- Default: @"AutoUpdate"@
+    --
+    -- @since 0.2.2
     }
 
 -- | Generate an action which will either read from an automatically

auto-update/Control/Debounce.hs

@@ -23,23 +23,27 @@
 --
 -- @since 0.1.2
 module Control.Debounce (
-    -- * Type
+    -- * Creation
+    mkDebounce,
+
+    -- * Settings
     DI.DebounceSettings,
     defaultDebounceSettings,
 
-    -- * Accessors
+    -- ** Accessors
     DI.debounceFreq,
     DI.debounceAction,
     DI.debounceEdge,
     DI.debounceThreadName,
+
+    -- ** Edge types
     DI.leadingEdge,
+    DI.leadingMuteEdge,
     DI.trailingEdge,
-
-    -- * Creation
-    mkDebounce,
+    DI.trailingDelayEdge,
 ) where
 
-import Control.Concurrent (newEmptyMVar, threadDelay)
+import Control.Concurrent (newMVar, threadDelay)
 import qualified Control.Debounce.Internal as DI
 
 -- | Default value for creating a 'DebounceSettings'.
@@ -56,8 +60,11 @@ defaultDebounceSettings =
 
 -- | Generate an action which will trigger the debounced action to be performed.
 --
+-- /N.B. The generated action will always immediately return, regardless of the 'debounceFreq',/
+-- /as the debounced action (and the delay\/cooldown) is always performed in a separate thread./
+--
 -- @since 0.1.2
 mkDebounce :: DI.DebounceSettings -> IO (IO ())
 mkDebounce settings = do
-    baton <- newEmptyMVar
+    baton <- newMVar ()
     DI.mkDebounceInternal baton threadDelay settings