export asyncdispatch handles (#15140)

* improve epoll docs * export handles * add comments and changelog
nim-lang · Aug 1, 2020 · 3ce32a7 · 3ce32a7
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diff --git a/changelog.md b/changelog.md
@@ -143,6 +143,8 @@
   `CountTable.inc` takes `val: int` again not `val: Positive`; I.e. it can "count down" again.
 - Removed deprecated symbols from `macros` module, deprecated as far back as `0.15`.
 
+- Export `asyncdispatch.PDispatcher.handles` so that an external library can register them.
+
 
 ## Language changes
 - The `=destroy` hook no longer has to reset its target, as the compiler now automatically inserts

diff --git a/lib/pure/asyncdispatch.nim b/lib/pure/asyncdispatch.nim
@@ -253,7 +253,7 @@ when defined(windows) or defined(nimdoc):
 
     PDispatcher* = ref object of PDispatcherBase
       ioPort: Handle
-      handles: HashSet[AsyncFD]
+      handles*: HashSet[AsyncFD] # Export handles so that an external library can register them.
 
     CustomObj = object of OVERLAPPED
       data*: CompletionData