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-rw-r--r--rts/win32/IOManager.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/rts/win32/IOManager.c b/rts/win32/IOManager.c
index e5da32b982..47bcf4bcf4 100644
--- a/rts/win32/IOManager.c
+++ b/rts/win32/IOManager.c
@@ -3,6 +3,9 @@
* Non-blocking / asynchronous I/O for Win32.
*
* (c) sof, 2002-2003.
+ *
+ * NOTE: This is the MIO manager, only used for --io-manager=posix.
+ * For the WINIO manager see base in the GHC.Event modules.
*/
#if !defined(THREADED_RTS)