From 9ec581009f4790a6874d7703d996d084e08e3c76 Mon Sep 17 00:00:00 2001
From: Andreas Fankhauser hiddenalpha.ch
Date: Wed, 7 Jan 2026 12:12:58 +0100
Subject: Add `err` param for Scheduler tasks so they can be cancelled

---
 include/qntan/Qntan.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'include/qntan')

diff --git a/include/qntan/Qntan.h b/include/qntan/Qntan.h
index b7e9d72..50abf24 100644
--- a/include/qntan/Qntan.h
+++ b/include/qntan/Qntan.h
@@ -250,8 +250,10 @@ struct Qntan_Executor {
 struct Qntan_Scheduler {
 	/**/
 	void (*onceAfterMs)(
-		struct Qntan_Scheduler**, int delayMs, void(*fn)(Qntan_Cls), Qntan_Cls );
+		struct Qntan_Scheduler**, int delayMs, void(*fn)(int err,Qntan_Cls), Qntan_Cls );
 	/* Schedule 'fn' to be called after 'delayMs' milliseconds.
+	 * `err` holds negative values on error. For example it could be
+	 * `-ECANCELED` if the scheduled task got canceled.
 	 * TODO: Specify if time refers to wall-clock, monotonic, etc. For now this
 	 * behavior is implementation-defined, BUT MAY IT WILL BE SPECIFIED HERE IN
 	 * FUTURE!
-- 
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