Changeset 618d02a in mainline

Timestamp:

2012-11-19T21:11:00Z (11 years ago)

Author:

Adam Hraska <adam.hraska+hos@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

657ddbd

Parents:

fbe6b65

Message:

Added architecture independent local cpu atomic exchange operation (it is atomic only wrt to interrupts and not other cpus).

File:

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

kernel/generic/include/atomic.h

@@ -53 +53 @@
 }
 
+
+/*
+ * If the architecture does not provide operations that are atomic
+ * only with respect to the local cpu (eg exception handlers) and
+ * not other cpus, implement these cpu local atomic operations with
+ * full blown smp-safe atomics.
+ */
+#ifndef local_atomic_exchange
+#define local_atomic_exchange(var_addr, new_val) \
+        __atomic_exchange_n((var_addr), (new_val), __ATOMIC_RELAXED)
+#endif
+
+
+
 #endif