Changeset f2cb80a in mainline for kernel/generic/include/atomic.h

Timestamp:

2024-02-23T17:57:23Z (15 months ago)

Author:

GitHub <noreply@…>

Children:

192019f

Parents:

86f862c (diff), 90ba06c (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

git-author:

boba-buba <120932204+boba-buba@…> (2024-02-23 17:57:23)

git-committer:

GitHub <noreply@…> (2024-02-23 17:57:23)

Message:

Merge branch 'HelenOS:master' into topic/packet-capture

File:

• kernel/generic/include/atomic.h (modified) (1 diff)

kernel/generic/include/atomic.h

@@ -39 +39 @@
 #include <typedefs.h>
 #include <stdatomic.h>
+
+/*
+ * Shorthand for relaxed atomic read/write, something that's needed to formally
+ * avoid undefined behavior in cases where we need to read a variable in
+ * different threads and we don't particularly care about ordering
+ * (e.g. statistic printouts). This is most likely translated into the same
+ * assembly instructions as regular read/writes.
+ */
+#define atomic_set_unordered(var, val) atomic_store_explicit((var), (val), memory_order_relaxed)
+#define atomic_get_unordered(var) atomic_load_explicit((var), memory_order_relaxed)
 
 #define atomic_predec(val) \