Silence signedness change through implicit conversion error

AnthonyLatsis · AnthonyLatsis · commit b7634b740a8b · 2025-06-09T19:47:41.000+01:00
The error pops up when using the rebranch Clang (stable/20250402):

```
/home/build-user/swift-corelibs-libdispatch/src/event/event_epoll.c:92:27: error: implicit conversion changes signedness: 'int' to 'uint32_t' (aka 'unsigned int') [-Werror,-Wsign-conversion]
92 |         return dmn-&gt;dmn_events &amp; ~dmn-&gt;dmn_disarmed_events;
   |                                ~ ^~~~~~~~~~~~~~~~~~~~~~~~~
```
diff --git a/src/event/event_epoll.c b/src/event/event_epoll.c
@@ -89,7 +89,7 @@ DISPATCH_ALWAYS_INLINE
 static inline uint32_t
 _dispatch_muxnote_armed_events(dispatch_muxnote_t dmn)
 {
-	return dmn->dmn_events & ~dmn->dmn_disarmed_events;
+	return dmn->dmn_events & ~(uint32_t)(dmn->dmn_disarmed_events);
 }
 
 DISPATCH_ALWAYS_INLINE

Original file line number	Diff line number	Diff line change
`@@ -89,7 +89,7 @@ DISPATCH_ALWAYS_INLINE`
`89`	`89`	`static inline uint32_t`
`90`	`90`	`_dispatch_muxnote_armed_events(dispatch_muxnote_t dmn)`
`91`	`91`	`{`
`92`		`- return dmn->dmn_events & ~dmn->dmn_disarmed_events;`
	`92`	`+ return dmn->dmn_events & ~(uint32_t)(dmn->dmn_disarmed_events);`
`93`	`93`	`}`
`94`	`94`
`95`	`95`	`DISPATCH_ALWAYS_INLINE`